Unnamed: 0 int64 0 2.34M | titles stringlengths 5 21.5M | abst stringlengths 1 21.5M |
|---|---|---|
1,400 | Antiarrhythmic Drugs. | Both supraventricular and ventricular arrhythmias are associated with increased mortality and morbidity. Numerous antiarrhythmics have been developed in an attempt to decrease the frequency of these arrhythmias, hoping to improve survival and improve quality of life. Antiarrhythmic agents are a diverse group of drugs t... |
1,401 | Atrial fibrillation in cats: 50 cases (1979-2002). | To determine signalment, clinical signs, diagnostic findings, treatment, and outcome for cats with atrial fibrillation (AF).</AbstractText>Retrospective study.</AbstractText>50 cats.</AbstractText>Medical records of cats that met criteria for a diagnosis of AF (ECG consisting of at least 2 leads, clear absence of P wav... |
1,402 | [Perspectives and limitations in the treatment of vagus-induced atrial fibrillation. Insights from cellular pharmacology]. | Pharmacological treatment of atrial fibrillation (AF) is limited by induction of malignant ventricular arrhythmias. Developing new drugs, a promising strategy is a more specific treatment of the atria. Muscarinic potassium current (IK[ACh]) is predominantly expressed in supraventricular tissue and mediates the inductio... |
1,403 | Suppression of paroxysmal atrial tachyarrhythmias--results of the SOPAT trial. | The indication to treat paroxysmal atrial fibrillation (PAF) is controversial. The Suppression of Paroxysmal Atrial Tachyarrhythmias (SOPAT) trial was designed to answer the following questions: (1) What is the average rate of spontaneous events of symptomatic PAF with and without anti-arrhythmic medication? (2) what i... |
1,404 | The anaesthetic management of a parturient with polymorphic catecholamine-sensitive ventricular tachycardia. | Polymorphic catecholamine-sensitive ventricular tachycardia is an uncommon but potentially life-threatening condition. There are few reports of this condition in pregnancy. It is one of five types of polymorphic ventricular arrhythmia, the others being long-QT syndrome, short coupled variant of torsade de point maligna... |
1,405 | Accelerated idioventricular rhythm during spinal anesthesia for cesarean section. | During cesarean section under regional anesthesia various anomalies of the electrocardiogram are reported such as bradycardia, supraventricular and ventricular premature beats, supraventricular paroxysmal tachicardia, S-T depression non-significant for myocardial ischemia and second degree atrioventricular block. We de... |
1,406 | Pregnancy and Kawasaki disease. | The management of a pregnant mother at 20 weeks' gestation presenting with ventricular fibrillation and her subsequent elective caesarean section at 38 weeks' gestation are described. Investigation showed the presence of coronary artery aneurysms due to Kawasaki disease. The pregnancy was further complicated by placent... |
1,407 | Effects of endothelins on cardiac and vascular cells: new therapeutic target for the future? | The predominant isoform of the endothelin peptide family. endothelin-1 (ET-1) exerts various biological effects. These include effects on arterial smooth muscle cells causing intense vasoconstriction and stimulation of cardiac cells. ET-1 promotes changes in cardiomyocytes that are consistent with electrical remodellin... |
1,408 | Diabetic cardiomyopathy: electromechanical cellular alterations. | Diabetic patients show a higher incidence of cardiac arrhythmias, including ventricular fibrillation and sudden death. However, although diabetic cardiomyopathy is a frequent and important complication of diabetes mellitus, its physiological basis is not completely known. The electrocardiogram of diabetic patients show... |
1,409 | Recent developments in cardiovascular drug therapy: treatment of atrial arrhythmias with new class III drugs and beyond. | Despite recent advances in non-pharmacologic approaches antiarrhythmic drugs still play a dominant role in the treatment of cardiac arrhythmias. Large randomized controlled clinical trials have pointed out the importance of a proper benefit to risk evaluation in various patient subsets. This led to a continuous decline... |
1,410 | Cardiac sarcolemmal ion channels and transporters as possible targets for antiarrhythmic and positive inotropic drugs: strategies of the past--perspectives of the future. | In this article we overview the most important antiarrhythmic and positive inotropic mechanisms based on pharmacological modification of an ion channel or a transport protein in the surface membrane of cardiac myocytes. First we briefly characterize the ion currents mediated by these proteins in atrial and ventricular ... |
1,411 | Protection against ventricular arrhythmias and cardiac death using adenosine and lidocaine during regional ischemia in the in vivo rat. | Despite decades of research, there are few effective ways to treat ventricular fibrillation (VF), ventricular tachycardia (VT), or cardiac ischemia that show a significant survival benefit. Our aim was to investigate the combined therapeutic effect of two common antiarrhythmic compounds, adenosine and lidocaine (AL), o... |
1,412 | Anaesthesia in patients with Brugada syndrome. | Brugada syndrome is characterized by right bundle branch block, ST segment elevation in the precordial leads and sudden death caused by ventricular fibrillation. We present two successful anaesthetic management cases in patients with Brugada syndrome. |
1,413 | Use of ibutilide in cardioversion of patients with atrial fibrillation or atrial flutter treated with class IC agents. | We sought to assess the efficacy and safety of ibutilide cardioversion for those with atrial fibrillation (AF) or atrial flutter (AFL) receiving long-term treatmentwith class IC agents.</AbstractText>Attenuation of ibutilide-induced QT prolongation has been observed in a small number of patients pretreated with class I... |
1,414 | Ibutilide added to propafenone for the conversion of atrial fibrillation and atrial flutter. | We evaluated the safety and efficacy of ibutilide when added to propafenone in treating both paroxysmal and chronic atrial fibrillation (AF) and atrial flutter (AFL).</AbstractText>The effects of ibutilide in patients with paroxysmal or chronic AF/AFL who were pre-treated with propafenone have not been previously evalu... |
1,415 | A program encouraging early defibrillation results in improved in-hospital resuscitation efficacy. | The purpose of this study was to determine whether survival to discharge after in-hospital cardiopulmonary arrest could be improved by a program encouraging early defibrillation that included switching from monophasic to biphasic devices.</AbstractText>In-hospital resuscitation continues to have a low success rate. Bip... |
1,416 | Severe frequent ventricular ectopy after exercise as a predictor of death in patients with heart failure. | The study was done to determine the prognostic importance of frequent ventricular ectopy in recovery after exercise among patients with systolic heart failure (HF).</AbstractText>Although ventricular ectopy during recovery after exercise predicts death in patients without HF, its prognostic importance in patients with ... |
1,417 | Effect of mitral valve repair/replacement surgery on atrial arrhythmia behavior. | Few data have been published on the effects of mitral valve surgery on atrial rhythm. The study aims were to determine the effects of surgery on: (i) persistence of atrial fibrillation (AF); (ii) measures of left atrial and ventricular dimensions; and (iii) ECG P-wave duration.</AbstractText>A retrospective case-note r... |
1,418 | Risk factors and survival after aortic valve replacement in octogenarians. | The study aim was to determine if aortic valve replacement in octogenarians is still rewarding.</AbstractText>Between 1986 and 2000, 500 patients received a Carpentier-Edwards pericardial valve in the aortic position. Of these patients, 348 also underwent coronary artery bypass grafting (CABG). Sixty patients were aged... |
1,419 | The impact of arrhythmias in acute heart failure. | Arrhythmias are common in chronic heart failure and affect outcomes. The incidence and significance of new arrhythmias in acute heart failure, however, are largely unknown.</AbstractText>The Outcomes of a Prospective Trial of Intravenous Milrinone for Exacerbations study randomized 949 patients with decompensated heart... |
1,420 | Control of heart rate versus rhythm in rheumatic atrial fibrillation: a randomized study. | Patients with rheumatic heart disease with atrial fibrillation incur significant morbidity and mortality. Which approach, ventricular rate control or maintenance of sinus rhythm, in this setting might be superior is not known. The role of amiodarone in this patient population for maintaining sinus rhythm has not been e... |
1,421 | A rationale for the use of anticoagulation in heart failure management. | Heart failure is a major public health concern for which treatment options have continued to evolve. While specific therapies such as beta blockers and angiotensin converting enzyme inhibitors have been shown to decrease hospitalizations and improve survival, the benefits of anticoagulation are less clear. Clinical gui... |
1,422 | Mutational screening of SCN5A linked disorders in Polish patients and their family members. | Mutations in SCN5A lead to a broad spectrum of phenotypes, including the Long QT syndrome, Brugada syndrome, Idiopathic ventricular fibrillation (IVF), Sudden infant death syndrome (SIDS) (probably regarded as a form of LQT3), Sudden unexplained nocturnal death syndrome (SUNDS) and isolated progressive cardiac conducti... |
1,423 | Dynamic and not static change in ventricular repolarization is a substrate of ventricular arrhythmia on chronic ischemic myocardium. | The restitution mechanism has been the focus of attention as the possible mechanism behind ventricular fibrillation (VF). However, its contribution in chronic ischemic heart has not been established.</AbstractText>We investigated chronic ischemic dogs with occlusion of left anterior descending artery. Sixty unipolar el... |
1,424 | Enhanced specificity of a dual chamber ICD arrhythmia detection algorithm by rate stability criteria. | Inappropriate therapy remains an important limitation of implantable cardioverter defibrillators (ICD). PARAD+ was developed to increase the specificity conferred by the original PARAD detection algorithm in the detection of atrial fibrillation (AF). To compare the performances of the two different algorithms, we retro... |
1,425 | Immediate and 1-year survival of out-of-hospital cardiac arrest victims in southern New Jersey: 1995-2000. | Most studies report the out-of-hospital cardiac arrest (OHCA) survival to hospital discharge. One-year survival and neurological outcomes in southern New Jersey in 1996-2000 were analyzed using a retrospective data review. There were 1,597 cases of OHCA. Initial survival ranged between 15% in 2000 and 19% in 1997. Surv... |
1,426 | Mortality analysis in patients with atrial fibrillation and implantable permanent pacemaker after ablation of the atrioventricular node. | Atrial fibrillation is associated with excess mortality. This analysis was performed to determine the magnitude of the excess mortality risk.</AbstractText>Life table analysis of a published study of 350 patients undergoing radiofrequency ablation of the atrioventricular node and permanent pacemaker implantation for sy... |
1,427 | Cardiac function-related gene expression profiles in human atrial myocytes. | To obtain insights into the molecular pathogenesis of heart failure in humans, we have analyzed the expression profiles of>12,000 genes in a total of 17 human specimens of right atrial myocytes. From this large data set, we here tried to identify gene clusters, expression level of which is correlated precisely with ... |
1,428 | Phase 2 reentry as a trigger to initiate ventricular fibrillation during early acute myocardial ischemia. | Phase 2 reentry caused by heterogeneous loss of the transient outward potassium current (I(to))-mediated epicardial action potential (AP) dome can produce a closely coupled R-on-T extrasystole leading to ventricular fibrillation (VF) under conditions of ST-segment elevation unrelated to ischemia. The present study exam... |
1,429 | Rate control vs rhythm control in patients with nonvalvular persistent atrial fibrillation: the results of the Polish How to Treat Chronic Atrial Fibrillation (HOT CAFE) Study. | The relative risks and benefits of strategies of rate control vs rhythm control in patients with atrial fibrillation (AF) remain to be fully explored.</AbstractText>The How to Treat Chronic Atrial Fibrillation (HOT CAFE) Polish trial was designed to evaluate in a randomized, multicenter, and prospective manner the feas... |
1,430 | Early assessment of heart rate variability is predictive of in-hospital death and major complications after acute myocardial infarction. | Depressed heart rate variability at acute myocardial infarction discharge is associated with poor long-term prognosis. However, its early (<48 h) predictive value has not been extensively investigated. Aim of this Multicenter Italian Study was to investigate, during acute myocardial infarction, in-hospital prognosti... |
1,431 | P wave dispersion and left atrial appendage function for predicting recurrence after conversion of atrial fibrillation and relation of p wave dispersion to appendage function. | We investigated P wave dispersion and left atrial appendage (LAA) function for predicting atrial fibrillation (AF) relapse, and the relationship between P wave dispersion and LAA function.</AbstractText>Sixty-four consecutive patients with AF lasting </=3 months were evaluated to predict the recurrence after success... |
1,432 | [Recovery from fatal ventricular fibrillation after immediate application of percutaneous cardiopulmonary support]. | We present a patient who recovered from refractory ventricular fibrillation after immediate application of percutaneous cardiopulmonary support (PCPS). On the postoperative day (POD) 3 after the Y-grafting surgery for abdominal aortic aneurysm, circulation collapsed due to sudden onset of ventricular fibrillation. Beca... |
1,433 | [Successful management of a patient for cardiac surgery with difficulty in weaning from cardiopulmonary bypass by using both isosorbide dinitrate and olprinone hydrochloride]. | A 57-year-old man with mitral stenosis underwent mitral valve plasty under general anesthesia. He had a history of cerebral infarction. Although he was with atrial fibrillation, his left ventricular function was good. Preoperative coronary angiography revealed no significant coronary stenosis. Induction of anesthesia a... |
1,434 | Transthoracic echocardiography for precardioversion screening during atrial flutter/fibrillation in young patients. | Transthoracic echocardiography (TTE) is reliable for detection of thrombi in the left ventricle and right atrium, but not in the left atrial appendage. Therefore, transesophageal echocardiography (TEE) is routinely performed in adults prior to electric cardioversion for atrial flutter/fibrillation (AFF). Whether young ... |
1,435 | Left ventricular assist device (LVAD) enables survival during 7 h of sustained ventricular fibrillation. | We describe the case of a patient implanted with a DeBakey left ventricular assist device (LVAD) as bridge to transplant who survived 7 h of ventricular fibrillation. He was successfully converted into a stable sinus rhythm. |
1,436 | Efficacy of lower-energy biphasic shocks for transthoracic defibrillation: a follow-up clinical study. | This clinical study prospectively evaluated the first-shock defibrillation efficacy of 150-joule impedance-compensated, 200-microF biphasic truncated exponential (BTE) shocks in patients with electrically-induced ventricular fibrillation (VF), and compared it with a historical control group treated with 200-J monophasi... |
1,437 | Effects of vasopressin on left anterior descending coronary artery blood flow during extremely low cardiac output. | Because of the possibility of vasopressin-mediated coronary vasospasm, this study was designed to assess effects of vasopressin compared to saline placebo on left anterior descending (LAD) coronary artery blood flow. Twelve anaesthetized domestic swine were prepared for LAD coronary artery blood flow measurement with u... |
1,438 | Continuous intratracheal insufflation of oxygen improves the efficacy of mechanical chest compression-active decompression CPR. | The aim of the present study was to compare the efficacy of intratracheal continuous insufflation of oxygen (CIO) with intermittent positive pressure ventilation (IPPV) regarding gas exchange and haemodynamics during mechanical chest compression-active decompression cardiopulmonary resuscitation (mCPR) provided by the ... |
1,439 | Assessment of upgrading to biventricular pacing in patients with right ventricular pacing and congestive heart failure after atrioventricular junctional ablation for chronic atrial fibrillation. | Effects of cardiac resynchronization therapy (CRT) in patients with right ventricular pacing and congestive heart failure (CHF) have only been reported in limited series. CRT in patients with atrial fibrillation remains controversial. Patients with AV junctional ablation offer a unique opportunity to study the effects ... |
1,440 | The role of implantable cardioverter defibrillator for primary vs secondary prevention of sudden death in patients with idiopathic dilated cardiomyopathy. | To analyse the characteristics and outcome of patients with idiopathic dilated cardiomyopathy (DC) considered at high risk of sudden death (SD) and treated with implantable cardioverter defibrillators (ICD) for primary prevention (Group A) in comparison with patients treated with ICDs because of previous sustained vent... |
1,441 | Evaluation of KCB-328, a new IKr blocking antiarrhythmic agent in pacing induced canine atrial fibrillation. | KCB-328 is a new potassium channel blocker, which prolongs action potential duration with exhibition of minimal reverse use dependence. We tested the efficacy and proarrhythmic potential of KCB-328, dofetilide and propafenone in the pacing induced canine model of atrial fibrillation (AF).</AbstractText>Mongrel dogs in ... |
1,442 | Atrial pacing for prevention of atrial fibrillation: assessment of simultaneously implemented algorithms.<Pagination><StartPage>371</StartPage><EndPage>379</EndPage><MedlinePgn>371-9</MedlinePgn></Pagination><Abstract><AbstractText Label="AIMS" NlmCategory="OBJECTIVE">Several preliminary studies indicated that right at... | Comparative assessments of the efficiency and noise immunity of the algorithms detecting the shock cardiac rhythms (SCR) are described in the paper. It is suggested to use the rejection filter of ventricular fibrillation as the principle algorithm for the SCR detection in an automated external defibrillator. The use of... |
1,443 | [Heart arrest: which reality and which training for the practitioner?]. | Sudden death related to out-of hospital cardiac arrest is an important cause of mortality, which is mainly caused by ventricular fibrillation, a potentially reversible condition. The prognosis of out-of-hospital cardiac arrest remains dismal despite well developed emergency medical services. Witnessed arrest, ventricul... |
1,444 | Acute thrombus formation in the left atrium after the termination of warfarin. | We report a case of acute thrombosis formation in the left atrium 3 days after the discontinuation of warfarin therapy prior to mitral valve replacement in a patient with mitral stenosis and atrial fibrillation. A 58-year-old Asian female patient was scheduled for mitral valve replacement for mitral stenosis. She had r... |
1,445 | Anesthetic management of a patient undergoing cardioverter defibrillator implantation: usefulness of transesophageal echocardiography and near infrared spectroscopy. | A case of a patient with sustained ventricular tachycardia (VT) undergoing implantable cardiovertor defibrillator (ICD) implantation, using transesophageal echocardiography (TEE) and near infrared spectroscopy (NIR) is described. A 67-year-old man with sustained VT associated with old myocardial infarction underwent IC... |
1,446 | KB-R9032, newly developed Na(+)/H(+) exchange inhibitor, attenuates reperfusion-induced arrhythmias in isolated perfused rat heart. | This study was conducted to elucidate the effects of KB-R9032, a newly developed Na(+)-H(+) exchange inhibitor, on reperfusion-induced ventricular arrhythmia in the isolated perfused rat heart.</AbstractText>Male Wistar rat hearts ( n = 48; 12 for each group) were perfused with modified Krebs-Ringer's solution equilibr... |
1,447 | Can local ventricular fibrillation interval predict ventricular refractory period in human hearts? | Assessment of the spatial dispersion of ventricular refractory periods has become an important part of electrophysiological study in both experimental and clinical settings, because inhomogeneity of ventricular refractoriness is associated with an increased risk of life-threatening ventricular arrhythmias. Previous ani... |
1,448 | Flecainide versus ibutilide for immediate cardioversion of atrial fibrillation of recent onset. | This study compared the efficacy and safety of intravenous flecainide and ibutilide for immediate cardioversion of atrial fibrillation (AF).</AbstractText>We conducted a prospective, randomised trial, including 207 patients with AF of recent onset (< or = 48 h). Flecainide was given over 20 min at a dose of 2 mg/kg ... |
1,449 | Arrhythmias of a sudden traumatic death. | A 73-year-old man was treated because of his paroxysmal palpitations became persistent. At the time of hospital admission atrial flutter was found. Antiarrhythmic drug treatment was unsuccessful therefore electrical cardioversion was indicated which restored his sinus rhythm. After one year of uneventful follow up Holt... |
1,450 | Different features of ventricular arrhythmias and the RR-interval dynamics in atrial fibrillation related to the patient's clinical characteristics: an analysis using RR-interval plotting. | The clinical features of ventricular arrhythmia and RR-interval dynamics in AF-patients remain unresolved. We successively plotted points on an X-Y plain as (X, Y) = (RRn, RRn + 1) from the consecutive RR-intervals of Holter ECGs. Eighty of 175 AF-patients were thus diagnosed to have ventricular arrhythmia based on the... |
1,451 | Transmural dispersion of repolarization and ventricular tachyarrhythmias. | Myocardial transmural dispersion of repolarization (TDR) has been associated with reentrant arrhythmias in animal studies but a clinical association has not yet to been demonstrated. The present study examines the relationship between TDR and ventricular tachyarrhythmias in human subjects.</AbstractText>This study cons... |
1,452 | [Risk and prevention of atrial fibrillation of non-valvular origin]. | Atrial fibrillation (AF) is an independent risk factor for ischemic stroke. In patients with AF, cardioembolias present about 10% of ischemic strokes. Transesophageal echocardiography is an ideal instrument for diagnostics of intracardiac thrombi. An aim of the study was to find the high risk markers for stroke in pati... |
1,453 | Cardiac and electrocardiographical manifestations of acute organophosphate poisoning. | To study the extent, frequency and pathogenesis of the cardiac and electrocardiographical manifestations of acute organophosphate poisoning.</AbstractText>37 adult patients admitted over a three-year period with a diagnosis of acute organophosphate or carbamate poisoning were studied prospectively. The clinical feature... |
1,454 | Coupled pacing improves cardiac efficiency during acute atrial fibrillation with or without cardiac dysfunction. | Coupled pacing (CP), a method for controlling ventricular rate during atrial fibrillation (AF), consists of a single electrical stimulation applied to the ventricles after each spontaneous activation. CP results in a mechanical contraction rate approximately one-half the rate during AF. Paired stimulation in which two ... |
1,455 | [Brugada syndrome and supraventricular arrhythmias]. | The author reports the case of a 46-year old patient diagnosed with idiopathic ventricular fibrillation (Brugada syndrome) further to induction of class Ic antiarrhythmic therapy for the management of paroxystic ventricular fibrillation. It would appear that this diagnosis is increasingly frequent in young patients wit... |
1,456 | The pseudorestrictive pattern of transmitral Doppler flow pattern after conversion of atrial fibrillation to sinus rhythm: is atrial or ventricular dysfunction to blame? | Patients with paroxysmal atrial fibrillation (AF) who have recently converted from AF to sinus rhythm often exhibit a restrictive Doppler pattern in the transmitral flow (TMF) velocity. However, the mechanism of this phenomenon has not been well defined. We evaluated the temporal change of TMF pattern and hemodynamics ... |
1,457 | Late incidence and predictors of persistent or recurrent heart failure in patients with mitral prosthetic valves. | The study's objective was to examine factors associated with persistent or recurrent congestive heart failure after mitral valve replacement.</AbstractText>Patients who underwent mitral valve replacement with contemporary prostheses (N = 708) were followed with annual clinical assessment and echocardiography. Cox propo... |
1,458 | Angiogenic growth factors and/or cellular therapy for myocardial regeneration: a comparative study. | Locally delivered angiogenic growth factors and cell implantation have been proposed for patients with myocardial infarcts without a possibility of percutaneous or surgical revascularization. The goal of this study was to compare the effects of these techniques in an experimental model of myocardial infarct.</AbstractT... |
1,459 | [Risk stratification and prevention of sudden death in patients with heart failure]. | Patients with heart failure can die of progressive refractory heart failure or sudden cardiac death. This article reviews the major clinical predictors of sudden death in patients with heart failure due to left ventricular systolic dysfunction. Although earlier studies have identified many independent univariate predic... |
1,460 | Changes in hematologic markers in patients with mitral stenosis after successful percutaneous balloon mitral valvuloplasty. | Systemic embolism is a major complication of mitral stenosis which is usually related to a presence of left atrial thrombus. Percutaneous balloon mitral valvuloplasty (PBMV) was previously reported to reduce the incidence of this complication. However, the mechanisms of this beneficial procedure was under investigated.... |
1,461 | Dobutamine stress MRI. Part I. Safety and feasibility of dobutamine cardiovascular magnetic resonance in patients suspected of myocardial ischemia. | The aim of the study was to evaluate safety and feasibility of dobutamine cardiovascular magnetic resonance (CMR) in patients with proven or suspected coronary artery disease. Dobutamine CMR was evaluated retrospectively in 400 consecutive patients with suspicion of myocardial ischemia. Dobutamine was infused using an ... |
1,462 | Genetic analysis of Brugada syndrome in Western Japan: two novel mutations. | Brugada syndrome is a form of idiopathic ventricular fibrillation characterized by right bundle-branch block pattern and ST elevation in the right precordial leads of the ECG. The SCN5A gene encodes the alpha-subunit of the human heart sodium channel, which plays a critical role in cardiac excitability, and mutations o... |
1,463 | Long-term prognosis of patients with paroxysmal atrial fibrillation depends on their response to antiarrhythmic therapy. | The rhythm control treatment strategy for persistent atrial fibrillation (AF) has been shown not to improve quality of life or prognosis any more than rate control. It is unclear whether the prognosis of the patients with paroxysmal AF (PAF) is influenced by the response to antiarrhythmic drug therapy (AAT).</AbstractT... |
1,464 | Is there a correlation between ventricular fibrillation cycle length and electrophysiological and anatomic properties of the canine left ventricle? | We hypothesized that myocardial infarction-related alterations in ventricular fibrillation (VF) cycle length (VFCL) would correlate with changes in local cardiac electrophysiological and anatomic properties. An electrophysiological study was performed in normal, subacute, and chronic infarction mongrel dogs. VF was ind... |
1,465 | First robotic endoscopic epicardial isolation of the pulmonary veins with microwave energy in a patient in chronic atrial fibrillation. | The pulmonary veins have been demonstrated to play an important role in generating atrial fibrillation. We report the first successful endoscopic epicardial isolation of the pulmonary veins in a patient with permanent atrial fibrillation, along with a 1-year follow-up. The procedure consisted of making a conduction blo... |
1,466 | Postoperative assessment of the univentricular repair by dynamic radionuclide studies. | The purpose of this investigation was to determine the role of radionuclide studies in evaluating postoperative Fontan hemodynamics and to quantify its diagnostic accuracy.</AbstractText>One hundred five patients (105), aged 11 months to 35 years old, who had undergone univentricular repair, underwent first-pass and mu... |
1,467 | Impact of intraoperative transesophageal echocardiography in patients undergoing valve replacement. | The role of intraoperative transesophageal echocardiography (IOTEE) in valve replacement surgery is not well established. The aim of this study was to explore the impact of immediate postpump IOTEE in valve replacement surgery at a single tertiary medical center.</AbstractText>The departmental database was screened for... |
1,468 | Efficacy of distinct energy delivery protocols comparing two biphasic defibrillators for cardiac arrest. | Limited data have been published on the use of external defibrillators that deliver impedance compensated biphasic (ICB) waveforms in patients. We compared 2 ICB defibrillators, the Heartstream XL (150-150-150 J protocol) and Heartsine Samaritan (100-150-200 J protocol) in 78 consecutive patients in cardiac arrest. The... |
1,469 | [Semiautomatic defibrillation in children]. | The main survival factor in cardiac arrest secondary to ventricular fibrillation (VF) is the interval between collapse and defibrillation; consequently, this treatment constitutes one of the most important links in the survival chain in adults. Although VF is a rare cause of out-of-hospital cardiac arrest in children, ... |
1,470 | Inappropriate single chamber ICD discharges due to supraventricular tachycardia with high degree atrioventricular block. | Supraventricular tachycardia with rapid ventricular response is well recognized as the more frequent cause of single chamber ICD inappropriate therapies. We report here a 18-year-old-woman with surgically corrected transposition of the great arteries who received repetitive inappropriate discharges from an ICD implante... |
1,471 | [Anatomy of the atria for rhythmologists]. | The anatomy of the atria is always in the mind of interventional rhythmologists. There is a mental superposition of the anatomical structures and the references obtained by different incidences of fluoroscopy and the endocavitary electrocardiogram. But understanding the anatomy also requires a certain knowledge of diss... |
1,472 | [Bidirectional ventricular tachycardias]. | Bidirectional tachycardias are rare arrhythmias. Nevertheless in the sixties and seventies these arrhythmias prompted much work relating to their mechanism. Discussions about the supposed supra-ventricular origin of certain bidirectional tachycardias essentially rested on presumptive arguments based on electrocardiogra... |
1,473 | [Arrhythmias of primary hypertrophic cardiomyopathy]. | Primary hypertrophic cardiomyopathy is a genetic disease causing sarcomere dysfunction. The structural and functional myocardial changes combine to produce cardiac arrhythmias related to reentry phenomena and to triggered automatic activity. The commonest arrhythmias are atrial fibrillation and ventricular arrhythmias;... |
1,474 | Transgenic upregulation of IK1 in the mouse heart leads to multiple abnormalities of cardiac excitability. | To assess the functional significance of upregulation of the cardiac current (IK1), we have produced and characterized the first transgenic (TG) mouse model of IK1 upregulation. To increase IK1 density, a pore-forming subunit of the Kir2.1 (green fluorescent protein-tagged) channel was expressed in the heart under cont... |
1,475 | Analysis of clinical outcomes following in-hospital adult cardiac arrest. | The outcome of in-hospital resuscitation following cardiac arrest depends on many factors related to the patient, the environment and the extent of resuscitation efforts. The aim of the present study was to determine predictors of successful resuscitation and survival to -hospital discharge following in-hospital cardia... |
1,476 | Magnetic resonance imaging-based biventricular pacemaker upgrade. | This report describes a patient with drug refractory severe chronic ischemic heart failure, atrial fibrillation with bradycardia, and left bundle branch block who had a failed implantation of a biventricular pacemaker because of a high left ventricular pacing threshold. VVI pacemaker implantation had not improved the p... |
1,477 | Complete loss of ICD programmability after magnetic resonance imaging. | The purpose of this case report is to describe the effects of an MRI performed on a patient without realizing that an ICD has been previously implanted. After a few seconds of imaging the adversity was recognized and the examination was stopped immediately. The patient was not pacemaker dependent and had neither physic... |
1,478 | Accuracy of atrial tachyarrhythmia detection in implantable devices with arrhythmia therapies. | The clinical application of atrial tachyarrhythmia (AT) episode data stored by implantable devices is presently limited by the high proportion of inappropriate detection. We quantified the percentage of inappropriate AT detection in two implantable devices with AT diagnostics and therapies via meta-analysis of stored A... |
1,479 | Surgical open-chest ventricular defibrillation: triphasic waveforms are superior to biphasic waveforms. | Triphasic shocks have been evaluated for endocardial defibrillation but not for open-chest epicardial defibrillation. The purpose of this study was to compare the efficacy and safety of biphasic versus triphasic shocks for epicardial defibrillation in a porcine model. Twenty-two adult swine (18-28 kg) were deeply anest... |
1,480 | High incidence of appropriate and inappropriate ICD therapies in children and adolescents with implantable cardioverter defibrillator. | Appropriate and inappropriate therapies of implantable cardioverter defibrillators have a major impact on morbidity and quality of life in ICD recipients, but have not been systematically studied in children and young adults during long-term follow-up. ICD implantation was performed in 20 patients at the mean age of 16... |
1,481 | Excessive increase in QT interval and dispersion of repolarization predict recurrent ventricular tachyarrhythmia after amiodarone. | Although chronic amiodarone has been proven to be effective to suppress ventricular tachycardia (VT) and ventricular fibrillation (VF), how we predict the recurrence of VT/VF after chronic amiodarone remains unknown. This study evaluated the predictive value of the QT interval, spatial, and transmural dispersions of re... |
1,482 | Effects of sinus rhythm restoration in patients with persistent atrial fibrillation: a clinical, echocardiographic and hormonal study. | The hemodynamic consequences of atrial fibrillation (AF) may lead to impairment of the left ventricular function and a reduction in exercise capacity. Studies on mechanical and neurohormonal remodelling in patients with AF are becoming increasingly important. The results could possibly enhance treatment strategies of t... |
1,483 | Acute effects of direct cell implantation into the heart: a pressure-volume study to analyze cardiac function. | To safely implant cells into the myocardium, we must establish a volume that prevents compromising cardiac performance. We studied pressure-volume (PV) to investigate the adverse effects of direct cell implantation in the acute phase.</AbstractText>We used 21 minipigs. In the normal heart model, we studied PV by measur... |
1,484 | L-thyroxine increases susceptibility of adult rats to low K+-induced ventricular fibrillation, and sinus rhythm restoration in old rats. | Hypokalaemia increases the risk for life-threatening arrhythmias; however, data about interaction with thyroid status are lacking. The aim of this study was to investigate vulnerability of l-thyroxine (T(4))-treated adult and old rats to low K(+)-induced ventricular fibrillation (VF) as well as the ability of the heart... |
1,485 | Troponin I in atrial fibrillation with no coronary atherosclerosis. | A number of reports have raised the possibility that myocardial strain could be associated to increased plasma levels of troponin I. A 69-year-old, male, Caucasian, patient was admitted with prolonged chest pain and dyspnoea. The electrocardiogram showed atrial fibrillation with a ventricular rate of about 120 to 150/m... |
1,486 | Thrombi in left ventricular hypertrabeculation/noncompaction--review of the literature. | Left ventricular hypertrabeculation/noncompaction (LVHT) is diagnosed when numerous, excessively prominent trabeculations and deep interventricular recesses are found in the left ventricle. Although it is assumed that the intertrabecular recesses are a location prone to thrombus formation, the prevalence of thrombi in ... |
1,487 | Thyroid storm and ventricular tachycardia. | A 34-year-old woman was brought to our emergency department because of sudden loss of consciousness. Ventricular tachycardia and fibrillation were noted on electrocardiographic monitoring and reverted to sinus rhythm after repeated defibrillation. She was treated as a case of thyroid storm. Although tachycardia and fev... |
1,488 | Rapid access arrhythmia clinic for the diagnosis and management of new arrhythmias presenting in the community: a prospective, descriptive study. | To investigate whether a rapid access approach is useful for the evaluation of patients with symptoms suggestive of a new cardiac arrhythmia.</AbstractText>Prospective, descriptive study.</AbstractText>Secondary care based rapid access arrhythmia clinic in West London, UK.</AbstractText>Patients referred by their gener... |
1,489 | Identification and ablation of atypical atrial flutter. Entrainment pacing combined with electroanatomic mapping. | Differentiation between typical and atypical atrial flutter solely based upon surface ECG pattern may be limited. However, successful ablation of atrial flutter depends on the exact identification of the responsible re-entrant circuit and its critical isthmus. Between August 2001 and June 2003, we performed conventiona... |
1,490 | [Cardiac arrhythmias and sudden cardiac death in women]. | Gender specific cardiac arrhythmias have been recognized for more than 80 years. The impact of gonadal steroids on the autonomic system and on the cellular electrophysiology of the cardiac autonomic system are discussed as is a direct genetic disposition on a cellular, functional or metabolic level. We nevertheless hav... |
1,491 | Cardiac consequences of hypertension in hemodialysis patients. | Hypertension in end-stage renal disease (ESRD) is an important risk factor for left ventricular hypertrophy (LVH), cardiac failure, coronary artery disease (CAD), and arrhythmia. LVH is generally considered an integrator of the long-term effects of hypertension and other cardiovascular (CV) risk factors and represents ... |
1,492 | Electrophysiologic effects of nicorandil on the guinea pig long QT1 syndrome model. | The slow component of the delayed rectifier K+ current IKs modulates repolarization of the cardiac action potential (AP), and the loss of IKs is known to cause long QT1 (LQT1) syndrome by prolonging action potential duration (APD). In this study, we generated a guinea pig LQT1 syndrome model using the IKs blocker chrom... |
1,493 | Effect of rapid biphasic shock subpulse switching on ventricular defibrillation thresholds. | The aim of this study was to demonstrate that significant reductions in defibrillation threshold (DFT) can be achieved by rapidly switching defibrillation pulses within an overall biphasic envelope between multiple endovascular electrode sets.</AbstractText>Defibrillation electrodes were implanted in four locations in ... |
1,494 | Optimization of atrial defibrillation with a dual-coil, active pectoral lead system. | Atrial defibrillation can be achieved with standard implantable cardioverter defibrillator (ICD) leads, but the optimal shocking configuration is unknown. The objective of this prospective study was to compare atrial defibrillation thresholds (DFTs) with three shocking configurations that are available with standard IC... |
1,495 | Association of anti-heat shock protein 65 antibodies with development of postoperative atrial fibrillation. | Atrial fibrillation (AF) is a frequently encountered arrhythmia after cardiac surgery, but its underlying mechanisms are still unclear. We hypothesize that autoimmune and inflammatory responses against heat shock protein 65 (HSP65) may be involved and hence examined the relationship between HSP65 autoantibodies and occ... |
1,496 | Atrial activity extraction for atrial fibrillation analysis using blind source separation. | This contribution addresses the extraction of atrial activity (AA) from real electrocardiogram (ECG) recordings of atrial fibrillation (AF). We show the appropriateness of independent component analysis (ICA) to tackle this biomedical challenge when regarded as a blind source separation (BSS) problem. ICA is a statisti... |
1,497 | [Psychiatric complication of an implanted automatic defibrillator]. | The implantable automatic defibrillator has completely changed the prognosis of potentially fatal ventricular arrhythmias by the delivery of an electric shock in the event of ventricular tachycardia or fibrillation. This vital device is sometimes poorly accepted from the psychological point of view by patients having b... |
1,498 | [Risk factors for cardiac mortality in cases of syncope with previous history of myocardial infarction]. | Syncope is considered to be a clinical sign predictive of sudden death in patients with a previous history of myocardial infarction. The aim of this study was to determine the prognostic factors in this population. The study population included 228 patients with myocardial infarction over one month old and who had no d... |
1,499 | Low serum triiodothyronine in acute myocardial infarction indicates major heart injury. | In patients with acute myocardial infarction (MI), low serum triiodothyronine (T3) concentration is commonly associated with a severe clinical course. The aim of this prospective study was to investigate whether a severe clinical course in patients with low T3 is related to the magnitude of myocardial injury assessed b... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.