Unnamed: 0 int64 0 2.34M | titles stringlengths 5 21.5M | abst stringlengths 1 21.5M |
|---|---|---|
1,100 | Clinical assessment and management of patients with implanted cardioverter-defibrillators presenting to nonelectrophysiologists. | All physicians increasingly will encounter patients who have implanted cardioverter-defibrillators (ICDs) for protection from ventricular arrhythmias. This advisory provides a concise summary relevant to the assessment and management of patients with ICDs, including those who present to primary care or emergency depart... |
1,101 | Cardioprotection by epsilon-protein kinase C activation from ischemia: continuous delivery and antiarrhythmic effect of an epsilon-protein kinase C-activating peptide. | We previously showed that a selective activator peptide of epsilon-protein kinase C (PKC), psi(epsilon)RACK, conferred cardioprotection against ischemia-reperfusion when delivered ex vivo before the ischemic event. Here, we tested whether in vivo continuous systemic delivery of psi(epsilon)RACK confers sustained cardio... |
1,102 | Azd7009: a new antiarrhythmic drug with predominant effects on the atria effectively terminates and prevents reinduction of atrial fibrillation and flutter in the sterile pericarditis model. | We tested the hypothesis that AZD7009 terminates induced atrial fibrillation (AF) and flutter (AFL) and prevents their reinduction, and that effects on refractoriness, conduction, and excitability are predominantly on the atria.</AbstractText>Thirty-eight electrophysiologic studies were performed during AZD7009 infusio... |
1,103 | Coexistence of two types of ventricular fibrillation during acute regional ischemia in rabbit ventricle. | We previously reported that a normal ventricle can demonstrate two types of ventricular fibrillation (VF), depending on the underlying electrophysiologic characteristics at the time of VF induction. We hypothesize that the two types of VF can coexist in acutely ischemic ventricles.</AbstractText>Optical mapping studies... |
1,104 | Preoperative electrocardiographic risk assessment of atrial fibrillation after coronary artery bypass grafting. | This study evaluated the role of surface ECG in assessment of risk of new-onset atrial fibrillation (AF) after coronary artery bypass grafting surgery (CABG).</AbstractText>One hundred fifty-one patients (126 men and 25 women; age 65 +/- 10 years) without a history of AF undergoing primary elective and isolated CABG we... |
1,105 | Spatial dispersion of action potential duration restitution kinetics is associated with induction of ventricular tachycardia/fibrillation in humans. | Action potential duration restitution (APDR) plays a role in initiation and maintenance of ventricular tachycardia (VT)/ventricular fibrillation (VF). We hypothesized that the steeply sloped APDR and its spatial heterogeneity contribute to VT/VF inducibility in patients with ventricular arrhythmia.</AbstractText>After ... |
1,106 | [Value of memory functions in implantable prostheses]. | The development of memory functions with memorised electrogrammes is one of the most important technical advances in cardiac pacemakers and defibrillators. These memory functions are very useful in the management of patients with implanted prostheses. In the case of defibrillators, the memory allows evaluation and vali... |
1,107 | [Implantable defibrillator and ventricular resynchronisation]. | Ventricular resynchronisation by pacing, introduced at the end of the 1990s, has revolutionised the management of advanced chronic cardiac failure. Its value in the reduction of haemodynamic mortality has been demonstrated in the latest studies. However, despite these decisive advances, patients with cardiac failure co... |
1,108 | [Role of cardiac resynchronisation in the treatment of cardiac failure]. | For 10 years cardiac resynchronisation has seen considerable development, as much on the technological side as at the level of its scientific validation. Several prospective studies have shown the functional benefits of cardiac resynchronisation in a selected population of refractory cardiac failure patients with impro... |
1,109 | [The role of cardiac pacing in the treatment of atrial arrhythmias]. | The role of cardiac pacing in the treatment of atrial arrhythmias can be analysed from the angle of prevention or treatment in a strategy of rhythm control or heart rate control. From the heart rate control viewpoint, "ablate and place" is a validated method, especially in terms of mortality based on the results of lar... |
1,110 | [New anti-arrhythmics--hope or disappointment?]. | The new anti-arrhythmic agents studied in the last decade have mostly come from research orientated towards determining the compounds which block the electrical currents implicated in the process of repolarisation (class III action). To this must be added dronedarone, which is related to amiodarone and as such displays... |
1,111 | New indications for the use of therapeutic hypothermia. | Randomised, controlled trials of therapeutic hypothermia have demonstrated improved outcomes after out-of-hospital cardiac arrest, where the initial cardiac rhythm was ventricular fibrillation. This therapy is now endorsed by the International Liaison Committee on Resuscitation. The role of therapeutic hypothermia in p... |
1,112 | Transplantation using hearts from primary pulmonary hypertensive donors for recipients with a high pulmonary vascular resistance. | Transplantation for patients with a high pulmonary vascular resistance (PVR) carries an increased risk of mortality and right heart failure following heart transplantation and continues to be a major problem. We evaluated the use of hearts from patients who underwent heart and lung transplantation for primary pulmonary... |
1,113 | Prevention of inappropriate therapy in implantable cardioverter-defibrillators: results of a prospective, randomized study of tachyarrhythmia detection algorithms. | The purpose of this randomized study was to investigate the performance of single- and dual-chamber tachyarrhythmia detection algorithms.</AbstractText>A proposed benefit of dual-chamber implantable cardioverter-defibrillators (ICDs) is improved specificity of tachyarrhythmia detection.</AbstractText>All ICD candidates... |
1,114 | Natriuretic peptides and the prevalence of congestive heart failure in patients with pacemakers. | The aim of the study was to investigate the diagnostic potential of natriuretic cardiac peptide measurement in the context of left ventricular dysfunction and comorbidities in a pacemaker population.</AbstractText>Ninety-five consecutive patients with pacemakers were included in the study. All patients underwent echoca... |
1,115 | [Comparison of the anti-arrhythmic effects of matrine and berbamine with amiodarone and RP58866]. | To clarify mechanisms that the antiarrhythmic effects of matrine and berbamine are weaker than those of amiodarone and RP58866.</AbstractText>Experimental arrhythmic models were induced by aconitine, coronary artery ligation and electric stimulation in rats and rabbits. Whole-cell patch-clamp techniques were used to re... |
1,116 | [Out-of-hospital resuscitation in Israel 2000]. | The aim of the study was to evaluate the impact of pre-hospital cardio-pulmonary resuscitation, performed by mobile intensive cardiac care units of Magen David Adom (MDA) teams in the framework of a national survey conducted in the period February and March 2000. During the survey, MDA performed 539 resuscitations, 485... |
1,117 | Do positive health expectations and optimism relate to quality-of-life outcomes for the patient with an implantable cardioverter defibrillator? | Clinical trials with the implantable cardioverter defibrillator (ICD) have demonstrated desirable outcomes in terms of mortality and morbidity among patients with potentially lethal arrhythmias. This study examined the "resilience factors" of positive health expectations and global optimism prospectively using the gene... |
1,118 | Effects of late regain of sinus rhythm on pulmonary artery pressure and functional status in patients with mitral valve replacement surgery and atrial fibrillation. | The study aim was to evaluate the effects of regaining sinus rhythm (SR) on pulmonary artery pressure (PAP) and NYHA class in patients undergoing mitral valve replacement (MVR) surgery and in atrial fibrillation (AF).</AbstractText>Forty patients (mean age 50.7+/-8.2 years) with previous MVRS and chronic AF were includ... |
1,119 | Determinants of health-related quality of life after aortic valve replacement in six-month survivors of intervention. | Although several determinants of survival after aortic valve replacement (AVR) have been identified, current knowledge regarding factors influencing the postoperative quality of life (QoL) is poor. The study aim was to evaluate health-related QoL (using Medical Outcome Study Short Form-36) in six-month survivors after ... |
1,120 | Minimally invasive close-chest method for creating reperfused or occlusive myocardial infarction in swine. | We sought to evaluate a closed-chest model for reperfused and occlusive myocardial infarction (MI) in pigs and to report experiences and pitfalls.</AbstractText>In 44 pigs, a balloon catheter was advanced into the left descending coronary artery (LAD) under fluoroscopic guidance. The balloon was inflated and occlusion ... |
1,121 | Role of the renin-angiotensin-aldosterone system in atrial fibrillation and cardiac remodeling. | This review summarizes recent clinical trial evidence showing a reduction in the development and recurrence of atrial fibrillation with angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor-blocking agents (ARBs). It then explores the possible mechanisms for this effect based on current animal models ... |
1,122 | Update on advanced life support and resuscitation techniques. | This article is a review of the most recent findings in resuscitation techniques in advanced cardiac life support. The article focuses particularly on the period after July 1, 2003, but relevant new findings before this period are also included.</AbstractText>Randomized clinical trial results suggest that the current c... |
1,123 | A prospective, randomized trial to determine the early and late reactions after the use of iopamidol 340 (Niopam) and iobitridol 350 (Xenetix) in cardiac catheterization. | Intravascular contrast agents presently used in modern digital catheter laboratories during cardiac catheterization are superior to older agents as regards patient tolerance. There are, however, significant differences between these agents.</AbstractText>The aim of this study was to determine the incidence of early (&l... |
1,124 | Genome-wide linkage scan identifies a novel genetic locus on chromosome 5p13 for neonatal atrial fibrillation associated with sudden death and variable cardiomyopathy. | Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, and patients with AF have a significantly increased risk for ischemic stroke. Approximately 15% of all strokes are caused by AF. The molecular basis and underlying mechanisms and pathophysiology of AF remain largely unknown.</AbstractText>We have... |
1,125 | Indications for and long-term survival in patients with automatic implantable cardioverter-defibrillators. | Automatic implantable cardioverter-defibrillators (AICDs) were implanted in 378 men and 95 women, mean age 69 +/- 12 years. At 3.6-year follow up, survival was 76% in patients who had an AICD because of cardiac arrest as a result of ventricular fibrillation or ventricular tachycardia not resulting from a transient or r... |
1,126 | Stability of the ECG features of complete right bundle branch block over time: a methodological study for implementation in research and clinical practice. | Since research is concentrated to a large extent on patients with left bundle branch block, we aimed at evaluating the hypothesis that measurements of certain intervals and other characteristics of the ECG may change over time in patients with right bundle branch block (RBBB), and to design a model, which could be impl... |
1,127 | Preventing stroke in people with atrial fibrillation: a cross-sectional study. | The annual stroke rate in atrial fibrillation is around 5 per cent with increased risk in those with hypertension, diabetes, left ventricular dysfunction and other cardiovascular risk factors. This study set out to identify the patients with atrial fibrillation and modifiable risk factors for stroke.</AbstractText>Anal... |
1,128 | Perioperative approach to a patient with Brugada syndrome. | Brugada syndrome is a recently described cardiac anomaly that may be responsible for up to one half of all sudden cardiac deaths in young adults without structural heart disease. It may also be worsened by beta-blockers, and it is almost unreported in the English language anesthesia literature. |
1,129 | Surgery for arrhythmias in children. | Transcatheter radiofrequency ablation to treat supraventricular and ventricular arrhythmias has supplanted routine surgical ablative therapy and redefined its role. A small population of arrhythmia patients now requires surgical ablation: those who have failed catheter ablation, patients with concomitant congenital hea... |
1,130 | Comparison of response to cardiac resynchronization therapy in patients with sinus rhythm versus chronic atrial fibrillation. | Cardiac resynchronization therapy (CRT) is a new therapeutic option for patients who have drug-refractory end-stage heart failure. Much information has been obtained from patients who have sinus rhythm, but the use of CRT in patients who have chronic atrial fibrillation (AF) has not been studied extensively. Accordingl... |
1,131 | Frequency of arrhythmic events during head-up tilt testing in patients with suspected neurocardiogenic syncope or presyncope. | Head-up tilt testing (HUT) is a useful diagnostic tool for evaluating suspected neurocardiogenic syncope. Although arrhythmic events during HUT have been occasionally reported, their incidence in a large number of patients is unknown. We aimed to assess the incidence and clinical significance of arrhythmic events in pa... |
1,132 | Effects of Y-27632, a selective Rho-kinase inhibitor, on myocardial preconditioning in anesthetized rats. | The objective of this study was to examine the effects of Y-27632, a selective Rho-kinase inhibitor, on ischemic preconditioning (IP) and carbachol preconditioning (CP) in anesthetized rats. Administration of Y-27632 (0.1 mg/kg) produced slight, but not significant, reduction in mean arterial blood pressure and suppres... |
1,133 | Nonlinear modeling of the atrioventricular node physiology in atrial fibrillation. | A nonlinear model of the atrioventricular (AV) node physiology in atrial fibrillation (AF) is proposed based on three assumptions: (1) normal distribution of atrial impulses, (2) right-skewed distribution of R-R intervals, (3) increase in the refractory period of the AV node due to rapid bombardment from the atria. Sim... |
1,134 | Myocardial infarct size-limiting effect of chronic hypoxia persists for five weeks of normoxic recovery. | We examined cardioprotective effect of chronic hypoxia and the time course of its recovery under normoxic conditions. Adult male Wistar rats were exposed to intermittent hypobaric hypoxia (7000 m, 8 h/day, 35 exposures) and susceptibility of their hearts to ischemia-induced ventricular arrhythmias and myocardial infarc... |
1,135 | Atrial fibrillation in a multiethnic inpatient population of a large public hospital. | Atrial fibrillation (AF) has not been well-studied in minority and underserved populations. We report a one-year inpatient experience of AF among 80,021 total ECG records in a multiethnic population of a large public hospital.</AbstractText>ECG parameters, demographic data, discharge diagnoses, and discharge status wer... |
1,136 | Complications of reperfusion in acute aortic artery occlusion following saddle embolization originating from an atrial myxoma. | A 58-year-old man presented to the hospital with an 8-hour history of acute-onset bilateral lower limb ischemia. A large saddle embolus had occluded the aorta and could not be removed by balloon endarterectomy through the femoral arteries. Successful open aortic and femoral thromboembolectomy followed by extensive fasc... |
1,137 | Long-term clinical course of patients after termination of ventricular tachyarrhythmia by an implanted defibrillator. | The implanted cardioverter defibrillator (ICD) improves survival in high-risk cardiac patients. This analysis from the MADIT-II trial database examines the long-term clinical course and subsequent mortality risk of patients after termination of life-threatening ventricular tachyarrhythmias by an ICD.</AbstractText>Life... |
1,138 | Stroke reduction in hypertensive adults with cardiac hypertrophy randomized to losartan versus atenolol: the Losartan Intervention For Endpoint reduction in hypertension study. | The Losartan Intervention For Endpoint reduction in hypertension (LIFE) study showed that treatment with the angiotensin II type-1 receptor antagonist losartan reduces overall stroke risk compared with conventional therapy with the beta-blocker atenolol. We conducted secondary analyses in LIFE to determine the extent t... |
1,139 | Teaching public access defibrillation to lay volunteers--a professional health care provider is not a more effective instructor than a trained lay person. | Survival improves in witnessed out-of-hospital cardiac arrest if the victim receives bystander-initiated cardiopulmonary resuscitation and rapid defibrillation (BLS/AED). The European Resuscitation Council has a simple programme to teach these life-saving skills that require no previous experience of automated external... |
1,140 | Outcome of out-of-hospital cardiac arrest--why do physicians withhold resuscitation attempts? | To describe the outcome of out-of-hospital cardiac arrest (OHCA) with a focus on why physicians withhold resuscitation attempts.</AbstractText>Prospective collection of data during 12 months by the anaesthesiologists from the Advanced Life Support unit (ALS) of the Emergency Medical Service (EMS) according to the Utste... |
1,141 | Vasopressin administered with epinephrine is associated with a return of a pulse in out-of-hospital cardiac arrest. | Recent data suggest that using vasopressin in combination with epinephrine (adrenaline) may improve treatment of out-of-hospital cardiac arrest. This study examined local experience with the combination of epinephrine and vasopressin administration.</AbstractText>Data were obtained from an urban, municipal emergency me... |
1,142 | Improved prediction of defibrillation success for out-of-hospital VF cardiac arrest using wavelet transform methods. | We report an improved method for the estimation of shock outcome prediction based on novel wavelet transform-based time-frequency methods. Wavelet-based peak frequency, energy, mean frequency, spectral flatness and a new entropy measure were studied to predict shock outcome. Of these, the entropy measure provided optim... |
1,143 | Cardiopulmonary resuscitation with a novel chest compression device in a porcine model of cardiac arrest: improved hemodynamics and mechanisms. | The goal of this study was to determine the magnitude and mechanisms of hemodynamic improvement of an automated, load-distributing band device (AutoPulse, Revivant Corp., Sunnyvale, California) compared with conventional cardiopulmonary resuscitation (C-CPR).</AbstractText>Improved blood flow during cardiopulmonary res... |
1,144 | Use of intravenous flecainide in horses with naturally-occurring atrial fibrillation. | It has been reported that i.v. flecainide has a high efficacy for the treatment of experimentally-induced acute atrial fibrillation (AF) in horses and that its use is associated with minimal toxic side effects.</AbstractText>The objectives were to study the efficacy of i.v. flecainide as a treatment for atrial fibrilla... |
1,145 | Sudden suffocation by surgical sponge retained after a 23-year-old thoracic surgery. | A 70-year-old male patient with a 23-year-old history of right lower lung lobectomy for primary pulmonary adenocarcinoma (T1 N0 M0) presented with recurrent bronchopneumonia and purulent sputum. Pleural callus, lung abscess, bronchopleural fistula, and stitch granulomas were confirmed by chest x-ray, computed tomograph... |
1,146 | Late onset of Wolff-Parkinson-White syndrome in a 72-year-old man. | We encountered a case of wide QRS tachycardia with chronic atrial fibrillation in Wolff-Parkinson-White syndrome. Unique features were late onset of syncope attacks associated with this tachycardia at an advanced age of 72 years old without previous documentation of Wolff-Parkinson-White syndrome on electrocardiogram. ... |
1,147 | Outpatient treatment of recent-onset atrial fibrillation with the "pill-in-the-pocket" approach. | In-hospital administration of flecainide and propafenone in a single oral loading dose has been shown to be effective and superior to placebo in terminating atrial fibrillation. We evaluated the feasibility and the safety of self-administered oral loading of flecainide and propafenone in terminating atrial fibrillation... |
1,148 | Catheter ablation for atrial fibrillation in congestive heart failure. | Congestive heart failure and atrial fibrillation often coexist, and each adversely affects the other with respect to management and prognosis. We prospectively evaluated the effect of catheter ablation for atrial fibrillation on left ventricular function in patients with heart failure.</AbstractText>We studied 58 conse... |
1,149 | Manifestation of Brugada syndrome after pacemaker implantation in a patient with sick sinus syndrome. | A 49-year-old woman experienced syncope 10 months after DDD pacemaker implantation for sick sinus syndrome. ECG revealed abnormal ST elevation in leads V1 to V3 during a paced rhythm. Multifocal premature ventricular contractions followed by ventricular fibrillation were documented. Saddleback-type ST elevation was con... |
1,150 | Fever as a precipitant of idiopathic ventricular fibrillation in patients with normal hearts. | Ventricular fibrillation (VF) is the main mechanism of sudden cardiac death. The clinical precipitants of sudden cardiac death due to idiopathic VF are poorly characterized. Emerging evidence implicates triggers originating predominantly from the distal Purkinje arborization and the right ventricular outflow tract.</Ab... |
1,151 | Prevalence, predictors, and mortality significance of the causative arrhythmia in patients with electrical storm. | Electrical storm (ES) is characterized by either refractory ventricular tachycardia (VT) or ventricular fibrillation (VF). However, little is known about the prevalence, predictors, and mortality implications of the causative arrhythmia in ES. We sought to assess the prevalence, predictors, and survival significance of... |
1,152 | Case reports. 1. An autopsy case of fatal arrhythmia induced by injuries of the atrioventricular conduction system: a case report. | A 65-year-old woman died three days after being involved in a traffic accident, following an episode of ventricular fibrillation. She was diagnosed as having suffered cardiac contusion, liver contusion, mediastinal hematoma and rib fracture on admission. Her electrocardiogram showed complete right bundle branch block, ... |
1,153 | Supraventricular tachyarrhythmias in Ebstein anomaly: management and outcome. | This study was undertaken to review the role of electrophysiology testing and to determine the early and late results of medical and surgical management of supraventricular tachyarrhythmias in Ebstein anomaly.</AbstractText>We reviewed 130 patients between 1990 and 2001 with Ebstein anomaly and history of tachyarrhythm... |
1,154 | Oral arsenic trioxide poisoning and secondary hazard from gastric content. | In a suicide attempt, a 54-year-old man ingested arsenic trioxide. Gastric lavage was performed, but most of the poison remained as a mass in his stomach. A total gastrectomy was also performed to avoid intestinal perforation and arsenic poisoning. After the operation, he developed ventricular fibrillation. At one poin... |
1,155 | Predictors of gastrointestinal complications after conventional and beating heart coronary surgery. | Gastrointestinal complications after cardiac surgery remain a significant problem despite improvements in pre-operative, operative and post-operative care. The pathophysiology is uncertain, and their prevention remains suboptimal. This prospective, randomised study was designed to define the role of cardiopulmonary byp... |
1,156 | Dietary flaxseed protects against ventricular fibrillation induced by ischemia-reperfusion in normal and hypercholesterolemic Rabbits. | Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), the (n-3) PUFA found in fish oils, exert antiarrhythmic effects during ischemia. Flaxseed is the richest plant source of another (n-3) PUFA, alpha-linolenic acid (ALA), yet its effects remain largely unknown. Our objective was to determine whether a flaxseed-r... |
1,157 | Amplified transmural dispersion of repolarization as the basis for arrhythmogenesis in a canine ventricular-wedge model of short-QT syndrome. | The short-QT syndrome is a new clinical entity characterized by corrected QT intervals <300 ms and a high incidence of ventricular tachycardia (VT) and fibrillation (VF). Gain-of-function mutations in the gene for outward potassium currents have been shown to underlie the congenital syndrome. The present study exami... |
1,158 | Heart-directed expression of a human cardiac isoform of cAMP-response element modulator in transgenic mice. | The transcriptional activation mediated by cAMP-response element (CRE) and transcription factors of the CRE-binding protein (CREB)/CRE modulator (CREM) family represents an important mechanism of cAMP-dependent gene regulation possibly implicated in detrimental effects of chronic beta-adrenergic stimulation in end-stag... |
1,159 | Short-term complications and resource utilization in matched subjects after on-pump or off-pump primary isolated coronary artery bypass. | Studies suggest that patients who undergo off-pump coronary artery bypass grafting (OPCABG) have fewer short-term complications and use fewer inpatient resources than do patients who undergo standard coronary artery bypass grafting (CABG) with extracorporeal circulation. However, dissimilarity between groups in risk fa... |
1,160 | Equivalence of the bioimpedance and thermodilution methods in measuring cardiac output in hospitalized patients with advanced, decompensated chronic heart failure. | An accurate and reliable noninvasive method for determining cardiac output/cardiac index would be valuable for patients with acutely decompensated advanced systolic heart failure.</AbstractText>To determine whether a correlation exists for cardiac output and index determined by using bioimpedance and thermodilution in ... |
1,161 | Transvenous cardioverter-defibrillator implantation with a double coil lead via persistent left superior vena cava. | A dual-coil defibrillation lead was inserted in a 64-year-old male through a persistent left superior vena cava draining into the coronary sinus. The lead, connected to a cardioverter-defibrillator (ICD) implanted in the left pectoral area, was looped in the right atrium positioning the proximal and distal lead coils i... |
1,162 | Effect of desflurane-induced preconditioning following ischemia-reperfusion on nitric oxide release in rabbits. | Nitric oxide (NO) is the mediator of ischemic preconditioning against myocardial infarction. Desflurane produces anesthetic preconditioning to protect the myocardium against infarction. In the model of myocardial ischemia-reperfusion injury in rabbits, we evaluated desflurane-induced ischemic preconditioning and studie... |
1,163 | Upper limit of vulnerability determination during implantable cardioverter-defibrillator placement to minimize ventricular fibrillation inductions. | The defibrillation threshold (DFT) and upper limit of vulnerability (ULV) were determined using step-down protocols in 50 patients who underwent implantable cardioverter-defibrillator placement or testing. The sensitivity and specificity of each ULV energy level was assessed for detecting an increased DFT, correlation ... |
1,164 | Left ventricular outflow tract obstruction due to anomalous insertion of papillary muscle. | A 56-year-old man who complained of quadrantic hemianopsia was admitted to determine its etiology. Cerebral angiography revealed no organic stenosis. Echocardiography showed clear direct continuity between a hypertrophied anterolateral papillary muscle and the anterior mitral leaflet, and the left ventricular (LV) outf... |
1,165 | Is the ratio of transmitral peak E-wave velocity to color flow propagation velocity useful for evaluating the severity of heart failure in atrial fibrillation? | Although analysis of the transmitral inflow (TMF) pattern is widely used for evaluating left ventricular diastolic function and provides valuable information for the management of heart failure (HF) in sinus rhythm, its utility in patients with atrial fibrillation (AF) has not been established. The aim of this study wa... |
1,166 | Psychological traits and emotion-triggering of ICD shock-terminated arrhythmias. | We have previously reported on the triggering of arrhythmia and hence, implanted cardioverter-defibrillators (ICD) shock by strong emotion. The purpose of the present study was to examine whether concordant psychological traits distinguish patients who experience emotion-triggered ICD shock.</AbstractText>Two hundred f... |
1,167 | Heart rate recovery after exercise: a predictor of ventricular fibrillation susceptibility after myocardial infarction. | Heart rate recovery after exercise, thought to be related to cardiac parasympathetic tone, has been shown to be a prognostic tool for all-cause mortality. However, the relationship between this variable and confirmed susceptibility to ventricular fibrillation (VF) has not been established. Therefore, myocardial ischemi... |
1,168 | Recent topics on the surgical treatment for atrial fibrillation. | After the introduction of endocardial radiofrequency catheter, only two arrhythmias, atrial fibrillation and ischemic ventricular tachycardia require surgical procedures. In this review, we describe recent advancements and problems of surgical treatment for atrial fibrillation. On the basis of multiple-circuit re-entry... |
1,169 | Pharmacological cardioversion of atrial fibrillation: current management and treatment options. | Atrial fibrillation (AF) is the most common form of arrhythmia, carrying high social costs. It is usually first seen by general practitioners or in emergency departments. Despite the availability of consensus guidelines, considerable variations exist in treatment practice, especially outside specialised cardiological s... |
1,170 | Clinical and pathological aspects of experimental oleander (Nerium oleander) toxicosis in sheep. | Dried Nerium oleander leaves at single lethal dose of 110 mg/kg body weight were administered orally to six native male sheep. Clinical signs of toxicosis in sheep began to appear about 30 min after receiving the oleander and included decrease of the heart rate followed by cardiac pauses and tachyarrhythmias; ruminal a... |
1,171 | Obesity and the risk of new-onset atrial fibrillation. | Obesity is associated with atrial enlargement and ventricular diastolic dysfunction, both known predictors of atrial fibrillation (AF). However, it is unclear whether obesity is a risk factor for AF.</AbstractText>To examine the association between body mass index (BMI) and the risk of developing AF.</AbstractText><Abs... |
1,172 | Ventricular fibrillation median frequency may not be useful for monitoring during cardiac arrest treated with endothelin-1 or epinephrine. | In this study, we evaluated whether median fibrillation frequency (MF) and mean fibrillation amplitude (AMP) reflect coronary perfusion pressure (CoPP) and predict successful defibrillation. MF, AMP, and CoPP were measured during prolonged ventricular fibrillation (VF) cardiac arrest and resuscitation in pigs. After 5 ... |
1,173 | Genetic disruption of Kir6.2, the pore-forming subunit of ATP-sensitive K+ channel, predisposes to catecholamine-induced ventricular dysrhythmia. | Metabolic-sensing ATP-sensitive K+ channels (KATP channels) adjust membrane excitability to match cellular energetic demand. In the heart, KATP channel activity has been linked to homeostatic shortening of the action potential under stress, yet the requirement of channel function in securing cardiac electrical stabilit... |
1,174 | Prevalence of right ventricular dysplasia-cardiomyopathy in a non-referral hospital. | In a cardiological department of a non-referral hospital responsible for 80,000 inhabitants with 2500 in-hospital patients and 1500 out-hospital patients per year, the prevalence, symptoms and prognosis of arrhythmogenic right ventricular dysplasia-cardiomyopathy (ARVD/C) were examined retrospectively. From 1997 to 200... |
1,175 | Utility of event loop recorders for the management of arrhythmias in young ambulatory patients. | We evaluated the diagnostic yield of event loop recorders in ambulatory patients referred for palpitations, dizziness or syncopal events and in whom a previous Holter recording was not diagnostic. A total of 96 patients were studied, 50 (52%) were men and 46 (48%) were women with a mean age of 37+/-10 years. Mean durat... |
1,176 | [Myocardial ischemic postconditioning: a brief ischemia causes conversion of resistent reperfusion-induced ventricular fibrillation into the normal rhythm]. | Brief episodes of myocardial ischemia-reperfusion were shown to be protective against reperfusion injury when used during early reperfusion after a prolonged ischemic episode. This phenomenon has been termed myocardial ischemic postconditioning. In this study, an effect of ischemic postconditioning on persistent reperf... |
1,177 | Reversible left ventricular dysfunction "takotsubo" cardiomyopathy associated with hyperthyroidism. | Myocardial stunning with hyperthyroidism is rare. A 79-year old woman with hyperthyroidism was admitted to our hospital complaining of palpitations due to paroxysmal atrial fibrillation. An echocardiogram showed akinesis of the apical wall which was not observed 2 weeks before admission. Cardiac catheterization perform... |
1,178 | Severe cardiac arrhythmias in young patients with myotonic dystrophy type 1. | Cardiac tachyarrhythmias have rarely been studied in young patients with myotonic dystrophy type 1 (DM1). The authors observed major cardiac rhythm disturbances in 11 patients aged 10 to 18 years. Tachyarrhythmic events were more frequent than impulse conduction disorders. Wide variations in CTG expansion were observed... |
1,179 | Short-term effects of right-left heart sequential cardiac resynchronization in patients with heart failure, chronic atrial fibrillation, and atrioventricular nodal block. | Single-site ventricular pacing in patients with heart failure, atrial fibrillation, and severe atrioventricular (AV) nodal block risks the generation of discoordinate contraction. Whether altering the site of stimulation can offset this detrimental effect and what role sequential right ventricular-left ventricular (RV-... |
1,180 | The ALPHA study (T-wave alternans in patients with heart failure): rationale, design and endpoints. | Sudden death and pump failure are the main causes of death in patients with heart failure. Patients with ischemic and non-ischemic cardiomyopathy are at similar risk of arrhythmic mortality; however, standard non-invasive and invasive tests are not routinely available for non-ischemic patients. T-wave alternans (TWA) h... |
1,181 | [Implantable cardioverter-defibrillator in the treatment of two patients with an increased risk of sudden cardiac death]. | A 23-year-old female with familial long-QT syndrome and a 48-year-old male with familial dilated cardiomyopathy were given an implantable cardioverter-defibrillator (ICD) as prophylaxis. About half a year after the implantation, there was an appropriate and successful ICD-discharge in both patients in connection with v... |
1,182 | [The implantable cardioverter-defibrillator: sometimes necessary]. | The implantable cardioverter-defibrillator (ICD) is used in patients who are at risk for ventricular fibrillation after having suffered from a myocardial infarction. Initially, patient selection was limited to survivors of impending sudden death with coronary artery disease. Later, ICD implantation in high-risk coronar... |
1,183 | Women and the implantable cardioverter defibrillator: a lifespan perspective on key psychosocial issues. | The clinical success of the implantable cardioverter defibrillator (ICD) in reducing mortality suggests that more women will be receiving ICDs in the future. The impact of ICD therapy in women is unique in western societies; the ICDs scar and lump in the pectoral area can lead to body image concerns due to the emphasis... |
1,184 | [Beating heart coronary artery bypass grafting for acute myocardial infarction]. | We consider that off-pump coronary artery bypass grafting (CABG) [OPCAB], which results in local myocardial ischemia, is more effective for patients with acute myocardial infarction (AMI) than conventional CABG under cardiac arrest with global myocardial ischemia. Twenty-one patients (15 males, 6 females) received OPCA... |
1,185 | Normal distribution of ventricular pressure-volume area of arrhythmic beats under atrial fibrillation in canine heart. | We previously found the frequency distribution of the left ventricular (LV) effective afterload elastance (E(a)) of arrhythmic beats to be nonnormal or non-Gaussian in contrast to the normal distribution of the LV end-systolic elastance (E(max)) in canine in situ LVs during electrically induced atrial fibrillation (AF)... |
1,186 | Conversion of atrial fibrillation to sinus rhythm during landiolol infusion. | A 71-year-old woman with a history of persistent atrial fibrillation underwent clipping of a ruptured cerebral artery aneurysm. During the surgery her cardiac rhythm was atrial fibrillation and the ventricular rate increased to 130 beats.min(-1). Administration of landiolol was started with 1-min loading infusion at 0.... |
1,187 | Radiofrequency ablation of ventricular fibrillation and multiple right and left atrial tachycardia in a patient with Brugada syndrome. | Brugada syndrome is a well-known form of idiopathic ventricular fibrillation (VF). Few data suggest that this arrhythmia may be triggered by ventricular premature beats (VPBs), and an association with other arrhythmia such as monomorphic ventricular tachycardia (VT) or supraventricular tachycardia (SVT) has been report... |
1,188 | Outcome of right ventricular bifocal pacing in patients with permanent atrial fibrillation and severe dilated cardiomiopathy due to Chagas disease: three years of follow-up. | Several studies have shown that heart failure may benefit from cardiac resynchronization therapy (CRT). Studies have demonstrated a beneficial effect of right ventricular (RV) bifocal pacing, using two leads at different positions, in similar patient populations. The aim was to evaluate this approach in Chagas disease ... |
1,189 | Reverse remodelling of systolic left ventricular contraction pattern by long term cardiac resynchronisation therapy: colour Doppler shows resynchronisation. | To quantify long term effects of cardiac resynchronisation therapy (CRT) by biventricular pacing in patients with heart failure (HF).</AbstractText>Regional changes in left ventricular (LV) contraction patterns effected by CRT in 19 patients with HF (12 with ischaemia; mean (SD) age 66 (9) years) with bundle branch blo... |
1,190 | Postprandial variations in ST-segment in a patient with Brugada syndrome and partial gastrectomy. | A 74-year-old man with a history of partial gastrectomy presented with an electrocardiogram consistent with Brugada syndrome and marked meal related fluctuations in the ST segment. ST-segment elevation was prominently attenuated at 30 minutes and increased at 120 minutes after meals. Analysis of heart rate variability ... |
1,191 | Direct comparison of a contractility and activity pacemaker sensor during treadmill exercise testing. | There are limited data about the chronotropic capacity of the peak endocardial acceleration (PEA) sensor. This study directly compared the chronotropic function from the PEA and the activity (ACT) sensor. The study included 18 patients (age 73 +/- 7 years) with > or = 75% pacemaker-driven heart rate (HR) and a PEA s... |
1,192 | Torsadogenic cardiotoxicity of antipsychotic drugs: a structural feature, potentially involved in the interaction with cardiac HERG potassium channels. | Many non-cardiovascular drugs of common clinical use cause, as an unwanted accessory property, the prolongation of the cardiac repolarisation process, due to the block of the HERG (Human Ether-a-go-go Related Gene) potassium channel, responsible for the repolarising I(Kr) current. This delayed cardiac repolarisation pr... |
1,193 | Aetiology, comorbidity and drug therapy of chronic heart failure in the real world: the EPICA substudy. | Chronic heart failure (CHF) is common and is frequently managed by primary care physicians (PCPs). Despite the European Society of Cardiology (ESC) Guidelines, standard treatments for CHF are frequently underutilised, particularly in primary care.</AbstractText>To evaluate current drug therapy for CHF in adults with HF... |
1,194 | Atrial fibrillation after surgical revascularization: is there any difference between on-pump and off-pump? | Postoperative atrial fibrillation (AF) is still frequent complication after cardiac surgery in spite of the improvements in the surgical procedures. There is still controversy whether or not, the absence of cardiopulmonary bypass results in a lower incidence of AF.</AbstractText>Six hundred and seventy patients that un... |
1,195 | Effects of pre-, peri-, and postmyocardial infarction treatment with losartan in rats: effect of dose on survival, ventricular arrhythmias, function, and remodeling. | Angiotensin receptor blockers (ARBs) reduce adverse left ventricular (LV) remodeling and improve LV function and survival when started postmyocardial infarction (MI). ARBs also reduce ventricular arrhythmias during ischemia-reperfusion injury when started pre-MI. No information exists regarding their efficacy and safet... |
1,196 | High-resolution optical mapping of intramural virtual electrodes in porcine left ventricular wall. | It is believed that shock-induced intramural virtual electrodes (IVE) play a critical role in defibrillation. IVE were recently demonstrated in the porcine left ventricle (LV), but their origin remains unknown. Macroscopic optical mapping showed that strong shocks induce IVE of only one polarity, which contradicts theo... |
1,197 | Defibrillation shock success estimation by a set of six parameters derived from the electrocardiogram. | It is well known that in some cases defibrillator shocks cannot terminate ventricular fibrillation (VF). Repeated failed shocks often may worsen subsequent response to therapy. This study assesses the ability of six parameters derived from the surface electrocardiogram (ECG) to predict defibrillation shock outcome. Usi... |
1,198 | Real time detection of ventricular fibrillation and tachycardia. | The automatic external defibrillator (AED) is a lifesaving device, which processes and analyses the electrocardiogram (ECG) and delivers a defibrillation shock to terminate ventricular fibrillation or tachycardia above 180 bpm. The built-in algorithm for ECG analysis has to discriminate between shockable and non-shocka... |
1,199 | Surface ECG vector characteristics of organized and disorganized atrial activity during atrial fibrillation. | The aim of this study was to examine atrial organization from vectorcardiograms (VCGs) derived from the surface ECG of atrial fibrillatory waves.</AbstractText>We retrieved ECGs recorded during ventricular asystole from 22 patients with AF undergoing ablation of the AV junction. The synthesized VCG of each f-wave cycle... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.