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9,000 | Commotio cordis--sudden cardiac death with chest wall impact. | Commotio cordis (CC), sudden death as a result of a blunt, often innocent-appearing chest wall blow, is being reported with increasing frequency. The clinical spectrum is diverse; however, a substantial number of cases occur in youth athletics. In events that occur during sport, victims are struck by projectiles regard... |
9,001 | Bradykinin is a mediator, but unlikely a trigger, of antiarrhythmic effects of ischemic preconditioning. | Brief reversible ischemic episodes (ischemic preconditioning, IPC) protect the heart against arrhythmias during a subsequent prolonged low-flow ischemia. We have recently shown that this protection involves release of bradykinin, activation of bradykinin B2 receptors followed by opening of sarcolemmal, but not mitochon... |
9,002 | Cardiac arrests at the Cenotaph. | This report describes the case histories of three veterans who suffered cardiac arrests at the 2005 Cenotaph Remembrance Parade. All three were successfully resuscitated and admitted to the St Thomas' Hospital Coronary Care Unit. They had internal cardioverter defibrillators (ICDs) inserted and remain well. All three p... |
9,003 | Is sensible use being made of an inpatient Holter monitoring and transthoracic echocardiogram service within acute medicine? | Transthoracic echocardiograms (TTE) and 24-hour Holter recordings are commonly requested investigations for patients presenting with symptoms thought to be due to underlying cardiac pathology. The objective of this study was to audit the use of inpatient TTE and Holter monitors in acute medical patients under the care ... |
9,004 | Survival after out-of-hospital cardiac arrest in Sydney, Australia. | Out-of-hospital cardiac arrest (OHCA) is a significant cause of death, but there is little published information on its incidence and outcomes in Australia.</AbstractText>This study was undertaken to determine the incidence and survival from OHCA in Sydney, New South Wales.</AbstractText>Patients listed on the Ambulanc... |
9,005 | Model-dependent effects of the gap junction conduction-enhancing antiarrhythmic peptide rotigaptide (ZP123) on experimental atrial fibrillation in dogs. | Abnormal intercellular communication caused by connexin dysfunction may be involved in atrial fibrillation (AF). The present study assessed the effect of the gap junctional conduction-enhancing peptide rotigaptide on AF maintenance in substrates that result from congestive heart failure induced by 2-week ventricular ta... |
9,006 | Loss-of-function mutations in the cardiac calcium channel underlie a new clinical entity characterized by ST-segment elevation, short QT intervals, and sudden cardiac death. | Cardiac ion channelopathies are responsible for an ever-increasing number and diversity of familial cardiac arrhythmia syndromes. We describe a new clinical entity that consists of an ST-segment elevation in the right precordial ECG leads, a shorter-than-normal QT interval, and a history of sudden cardiac death.</Abstr... |
9,007 | Wave similarity of human ventricular fibrillation from bipolar electrograms. | The aim of this report was to review existing techniques for assessment of directionality in fibrillation and to describe the concept of wave similarity analysis in human VF.</AbstractText>We applied a technique called wave similarity analysis to bipolar electrograms to study directionality during various rhythms (sinu... |
9,008 | Death potentially secondary to sub-Tenon's block. | An 82-year-old ASA 2 patient underwent routine sub-Tenon's block for cataract surgery. One minute after injection of the local anaesthetic, the patient had a generalised tonic-clonic seizure and developed refractory ventricular fibrillation; subsequent resuscitation was unsuccessful. With no evidence for intravascular ... |
9,009 | Adaptation of the heart to hypertension is associated with maladaptive gap junction connexin-43 remodeling. | We hypothesized that hypertension-related myocardial remodeling characterized by hypertrophy and fibrosis might be accompanied by cell-to-cell gap junction alterations that may account for increased arrhythmogenesis. Intercellular junctions and expression of gap junction protein connexin-43 were analyzed in rat heart t... |
9,010 | Successful radiofrequency ablation determines atrio-ventricular remodelling and improves systo-diastolic function at tissue Doppler-imaging. | Clinical, echocardiographic results and determinants of atrial fibrillation (AF) recurrence following AF ablation during mitral valve surgery (AFAMVS) were evaluated.</AbstractText>Fifty-two patients undergoing radiofrequency AFAMVS between January 2003 and December 2005, underwent serial echocardiographies with tissue... |
9,011 | Association of delay to first intervention with return of spontaneous circulation in a swine model of cardiac arrest. | No single drug improves survival after cardiac arrest, despite success in animal studies. We sought to determine the duration of circulatory arrest after which maximal drug treatment and a rescue shock would fail to achieve return of spontaneous circulation (ROSC).</AbstractText><AbstractText Label="DESIGN/SUBJECTS" Nl... |
9,012 | The impact of manual defibrillation technique on no-flow time during simulated cardiopulmonary resuscitation. | Rapid defibrillation is the most effective strategy for establishing return of spontaneous circulation following cardiac arrest due to ventricular fibrillation. The aim of this study is to measure the delay due to of charging the defibrillator during chest compression in an attempt to reduce the duration of the pre-sho... |
9,013 | Hypertrophic cardiomyopathy: the importance of arrhythmic events in patients at risk for sudden cardiac death. | To evaluate, in patients with hypertrophic cardiomyopathy and risk for SCD who underwent implantable cardioverter-defibrillator (ICD) implantation: a- the occurrence of arrhythmic events; b- the occurrence of clinical events and their correlation with arrhythmic events; c- the occurrence of ICD shock therapy and clinic... |
9,014 | The signal-averaged electrocardiogram of atrial activation in patients with or without paroxysmal atrial fibrillation. | To analyze the parameters of the time domain P-wave signal-averaged electrocardiogram (P-SAECG) and compare them with the P-wave duration on the conventional electrocardiogram (P on ECG) as well as the left atrium diameter (LAD) and left ventricular ejection fraction (EF) obtained on the echocardiogram in order to eval... |
9,015 | Autonomic modulation of electrical restitution, alternans and ventricular fibrillation initiation in the isolated heart. | Abnormal autonomic nerve activity is a strong prognostic marker for ventricular arrhythmias but the mechanisms underlying the autonomic modulation of ventricular fibrillation (VF) initiation are poorly understood. We examined the effects of direct sympathetic (SS) and vagus (VS) nerve stimulation on electrical restitut... |
9,016 | [The efficacy and safety of antithrombotic therapy with warfarin in nonrheumatic atrial fibrillation]. | To identify the optimal intensity of anticoagulation with warfarin in patients with nonvalvular atrial fibrillation by studying the relation between the thromboembolic and hemorrhagic events.</AbstractText>Nonvalvular atrail fibrillation patients randomized to receive adjusted-dose warfarin [international normalized ra... |
9,017 | Preclinical cardio-safety assessment of torsadogenic risk and alternative methods to animal experimentation: the inseparable twins. | The last decade has been marked by the withdrawal from the market of several medicines whose use in patients has been associated with the development of torsade de pointes (TdP), a potentially life-threatening polymorphic tachycardia. In a few cases, TdP can degenerate into ventricular fibrillation and lead to sudden d... |
9,018 | Brugada syndrome unmasked by pneumonia. | A 69-year-old white woman presented at our emergency room with right-side pleuritic chest pain, fever, and tachycardia. Results of the physical examination, routine laboratory tests, and chest radiography were unexceptional. An electrocardiogram showed ST elevation in leads V(1) through V(3) with T-wave inversion. Beca... |
9,019 | Uncorrected tetralogy of Fallot in an 86-year-old patient. | This report describes the presentation and evaluation of an elderly man with uncorrected tetralogy of Fallot. The patient had remained fairly asymptomatic for much of his life. He presented to the hospital at age 86 with new-onset atrial fibrillation with rapid ventricular response and a non-ST-segment elevation myocar... |
9,020 | Functional capacity after traditional Chinese medicine (qi gong) training in patients with chronic atrial fibrillation: a randomized controlled trial. | Evidence indicates that low energy expenditure protocols derived from traditional Chinese medicine may benefit patients with cardiac impairment; therefore, the authors carried out a randomized controlled trial to test a 16-week medically assisted qi gong training program for the physical rehabilitation of patients with... |
9,021 | The effect of successful electrical cardioversion on left ventricular diastolic function in patients with persistent atrial fibrillation: a tissue Doppler study. | Changes in mitral inflow and pulmonary venous flow after electrical cardioversion (ECV) in patients with persistent atrial fibrillation (AF) were showed in many former studies. In our study we investigated the effects of ECV on diastolic parameters by using tissue Doppler imaging (TDI) in patients with persistent AF.</... |
9,022 | Risk factors for ischemic stroke: electrocardiographic findings. | Standard 12-lead electrocardiography is a routine and mandatory cardiovascular examination in the evaluation of stroke patients. This study investigates the relationship of electrocardiography findings and first-ever ischemic stroke.</AbstractText>This hospital-based case-control study consisted of 238 consecutively ho... |
9,023 | Compromising bradycardia: management in the emergency department. | Bradycardia may represent a serious emergency. The need for temporary and permanent pacing is unknown.</AbstractText>We analysed a registry for the incidence, symptoms, presenting rhythm, underlying mechanism, management and outcome of patients presenting with compromising bradycardia to the emergency department of a u... |
9,024 | [Implantable cardioverter defibrillator: an update]. | Automatic implantable cardioverter defibrillator is now a well established therapy to prevent sudden cardiac death. In secondary prevention (patients with a previous cardiac arrest) defibrillator can be considered as a class I indication, if there is no transient or reversible cause. The level of proof is A. in primary... |
9,025 | Reversible cardiomyopathy. | We report a case of reversible dilated cardiomyopathy, in a middle-aged male. The patient presented with severe left ventricular dysfunction and atrial fibrillation. Inspite of vigorous medical therapy there was only mild clinical improvement. Subsequently laboratory test results diagnosed it as hyperthyroidism and the... |
9,026 | [Cardiac resynchronization therapy in patients with permanent atrial fibrillation--with or without atrial lead?]. | A 59-year-old patient received a biventricular defibrillator for cardiac resynchronization therapy (CRT) due to severe heart failure and a left bundle branch block. He had suffered from mitral stenosis and had received valve replacement 16 years earlier. Because he had permanent atrial fibrillation since that time, no ... |
9,027 | Radiofrequency current catheter ablation of accessory atrioventricular pathways. | The purpose of this study was to evaluate the safety and efficacy of a radiofrequency catheter ablation in the patients with the Wolff-Parkinson-White syndrome or paroxysmal supraventricular tachycardia involving a concealed accessory atrio ventricular connection.</AbstractText>During a 45 month period (1st January 200... |
9,028 | [The effects of intracoronary infusion of bone marrow mononuclears on myocardial contractility]. | The effects of intracoronary infusion of bone marrow mononuclears (BMM) on myocardial contractility after myocardial infarction (MI) was studied in 16 post-infarction patients. The intracoronary infusion of autologic BMM during the subacute period of MI did not have a significant effect on myocardial contractility, the... |
9,029 | [Morgagni-Adams-Stokes after adenosine injection in a patient with WPW syndrome--a case report]. | A case of a 16-year-old girl with left sided accessory pathway is presented. Following adenosine-induced termination of atrio-ventricular reentrant tachycardia the patient developed polymorphic ventricular tachycardia followed by preexcited atrial fibrillation with very rapid ventricular response and syncope. Arrhythmi... |
9,030 | Radio-frequency ablation of arrhythmias following congenital heart surgery. | Cardiac arrhythmias as a late complication following congenital heart surgery are encountered more and more frequently in clinical practice. The use of new electrophysiological methods of visualisation and mapping improves the efficacy of radio-frequency (RF) ablation of these arrhythmias.</AbstractText>To assess patte... |
9,031 | [Sudden cardiac arrest as the first symptom of coronary heart disease--case report]. | We describe the patient at whom sudden cardiac arrest was the first symptom of coronary heart disease. In the paper, we describe factors which influence the effectiveness of resuscitation in out of hospital cardiac arrest. Applying the cardiac massage by a bystander, the presence of defibrillation rhythm and short peri... |
9,032 | [Positive microvolt T-wave alternans as a marker of ventricular arrhythmia trigering during cardioverter-defibrillator implantation]. | Microvolt T-wave alternans (MTWA) is promising method for noninvasive assessment of arrhythmic risk, but its role hasn't established yet. The aim of this study was to establish the MTWA potency to predict the ventricular arrhythmia triggering during implantable cordioverter-defibrillator (ICD) implantation. Material an... |
9,033 | Prevention of life-threatening ventricular tachyarrhythmia by a novel and pure class-III agent, nifekalant hydrochloride. | Nifekalant hydrochloride (NIF) is a novel intravenous class-III antiarrhythmic agent with a pirimidinedione structure that purely blocks the K+ channel without inhibiting beta-adrenergic receptors. The authors investigated the efficacy of NIF for refractory ventricular tachycardia/fibrillation (VT/VF). They studied 30 ... |
9,034 | Successful use of a transvenous dual-chamber automatic implantable cardiac defibrillator after a classic Fontan operation for tricuspid atresia. | We report the first successful totally percutaneous pacing and defibrillation of a single ventricle in a 52-year-old woman who had undergone a classic Fontan operation (atriopulmonary connection) for tricuspid atresia 21 years earlier. Left ventricular pacing and sensing was obtained with a bipolar lead in the lateral ... |
9,035 | Multiple premature beats triggered ventricular arrhythmias during pilsicainide infusion in a patient with inferior ST-segment elevation. | A 17-year-old man was referred to our hospital for treatment of common paroxysmal atrial flutter. His electrocardiogram at rest showed subtle ST-segment elevation in leads II, III, and aV(F). Intravenous pilsicainide caused further ST-segment elevation in the inferior leads, new ST-segment depression in leads V2-V6, tw... |
9,036 | Differences in arrhythmogenicity between the canine right ventricular outflow tract and anteroinferior right ventricle in a model of Brugada syndrome. | The Brugada syndrome is characterized by ST-segment elevation on the ECG, especially in the right precordial leads sensitive to the right ventricular outflow tract (RVOT).</AbstractText>The purpose of this study was to evaluate the hypothesis that right ventricular electrophysiologic heterogeneity caused arrhythmogenic... |
9,037 | Interactive atrial neural network: Determining the connections between ganglionated plexi. | The electrophysiologic functions of the intrinsic cardiac autonomic nervous system (ANS) are not well understood.</AbstractText>The purpose of this study was to investigate the functional interactions between ganglionated plexi within the intrinsic cardiac ANS.</AbstractText>The hearts of 21 dogs were exposed via right... |
9,038 | Initial United States experience with the Paracor HeartNet myocardial constraint device for heart failure. | This study was undertaken to review the initial results and surgical safety data for the US Food and Drug Administration safety and feasibility trial of the Paracor HeartNet (Paracor Medical, Inc, Sunnyvale, Calif.) myocardial constraint device.</AbstractText>Patients with New York Heart Association functional class II... |
9,039 | Impact of left atrial appendage exclusion on left atrial function. | We sought to investigate the short-term and midterm effects of left atrial appendage exclusion on left atrial function. Left atrial appendage exclusion is considered a possible therapeutic option for stroke prevention in patients with atrial fibrillation. Favorable outcomes have encouraged widespread use of left atrial... |
9,040 | Melatonin reduces ventricular arrhythmias and preserves capillary perfusion during ischemia-reperfusion events in cardiomyopathic hamsters. | Earlier studies showed that melatonin has powerful antioxidative effects on ischemia-reperfusion (I/R) injury in healthy hamsters. In the present study, the possible protective effects of melatonin in 10-month-old cardiomyopathic (CM) hamsters were evaluated in a model of I/R in the cheek pouches observed by intravital... |
9,041 | Milrinone combined with vasopressin improves cardiac index after cardiopulmonary resuscitation in a pig model of myocardial infarction. | Milrinone used for acute cardiac insufficiency could be of interest during cardiopulmonary resuscitation because of its positive inotropic effects. In this study, the combination of milrinone-vasopressin was compared with epinephrine and vasopressin, as well as with the combination of epinephrine-vasopressin, in refere... |
9,042 | Crosstalk between L-type calcium channels and ZnT-1, a new player in rate-dependent cardiac electrical remodeling. | Crosstalk between two membrane transport systems is an established mechanism underlying regulation. In this study, we investigated the interaction between ZnT-1, a putative plasma membrane zinc transporter, and L-type voltage-dependent calcium channels (LTCC). In the atrium of the myocardium decreased activity of the L... |
9,043 | Diagnostic and prognostic value of a type 1 Brugada electrocardiogram at higher (third or second) V1 to V2 recording in men with Brugada syndrome. | To evaluate the diagnostic and prognostic value of an electrocardiogram (ECG) recorded at a higher (third or second) intercostal space, 98 men (17 to 76 years of age, mean +/- SD 47 +/- 13; with documented ventricular fibrillation [VF] in 22 and syncope in 32) were categorized into 3 groups; 68 men had a spontaneous ty... |
9,044 | [Cardiac arrhythmias in the elderly]. | In the elderly, cardiac arrhythmias and conduction disturbances are characterized by their high frequency, diagnostic difficulties, low tolerance, and delicate treatment. Atrial fibrillation, the prevalence of which exceeds 10% after 80 years, is usually related to hypertensive or ischemic heart disease, and is the cau... |
9,045 | [Biology of cardiac and vascular senescence]. | None of the many theories of senescence can account for the aging process in its entirety. These theories include the evolutionary theory of aging and its EvoDevo corollary, the replicative senescence and free radicals theory, theories based on large-scale analyses (proteomics, etc.), and systemic theories. Cardiovascu... |
9,046 | [Arrhythmia-induced dilated cardiomyopathies]. | Arrhythmic cardiomyopathies are due to ventricular dysfunction following prolonged or chronic tachycardia; the clinical pictures one of congestive heart failure, which is totally reversible after the treatment of tachycardia and the restoration of sinus rhythm. Since Whipple's first description of this model of heart f... |
9,047 | [Automated external defibrillation in children]. | Ventricular fibrillation is an infrequent arrhythmia in cardiac arrest occurring in the out-of-hospital setting in infants and small children. However, outcome is good provided early defibrillation is performed; consequently, this procedure is one of the main links in the chain of survival in children with a shockable ... |
9,048 | Heart rate turbulence and variability in patients with ventricular arrhythmias. | To evaluate the changes in autonomic neural control mechanisms before malignant ventricular arrhythmias, we measured heart rate variability (HRV) and heart rate turbulence (HRT) in patients with ventricular tachycardia or fibrillation (Group I; n=6), non sustained ventricular tachycardia (Group II; n=32), frequent prem... |
9,049 | Tachycardia-induced Cardiomyopathy (Tachycardiomyopathy). | The term tachycardia-induced cardio-myopathy or tachycardiomyopathy refers to impairment in left ventricular function secondary to chronic tachycardia, which is partially or completely reversible once the tachyarrhythmia is controlled. Tachycardia-induced cardiomyopathy has been shown to occur both in experimental mode... |
9,050 | [The concise history of atrial fibrillation]. | The author reviews the history of atrial fibrillation, the most common sustained cardiac arrhythmia. The chaotic irregularity of arterial pulse was clearly acknowledged by most of physicians of the ancient China, Egypt and Greece. William Harvey (1578-1657), who first described the circulatory system appropriately, was... |
9,051 | Diagnostic and genetic aspects of the Brugada and other inherited arrhythmias syndromes. | Doctor Wilde, presenting on behalf of himself and Dr Eckardt, discussed the role of invasive and noninvasive tests for risk stratification of Brugada syndrome. Doctor Hiraoka, presenting on behalf of Y. Yokoyama, M. Takagi, N. Aihara, K. Aonuma, and the Japan Idiopathic Ventricular Fibrillation Study Investigators, fur... |
9,052 | [Atrioventricular block in unstable angina. Results of the ARIAM registry]. | Describe the frequency of high degree atrioventricular block (HDAVB) in patients with unstable angina (UA), analyze the variables associated with their appearance and evaluate whether HDAVB is independently associated with increased mortality or increased length of ICU stay.</AbstractText>Retrospective descriptive stud... |
9,053 | Clinical trials update from the American Heart Association 2006: OAT, SALT 1 and 2, MAGIC, ABCD, PABA-CHF, IMPROVE-CHF, and percutaneous mitral annuloplasty. | This article provides information and a commentary on trials presented at the American Heart Association meeting held in November 2006, relevant to the pathophysiology, prevention and treatment of heart failure. All reports should be considered as preliminary data, as analyses may change in the final publication. The O... |
9,054 | Characteristic features of QRST integral mapping in patients with high risk Brugada syndrome. | The characteristic features of QRST integral mapping in the Brugada-type resting ECG of patients at a high risk for life-threatening ventricular arrhythmias were examined.</AbstractText>QRST integral mapping was performed in 11 Brugada-type ECG patients with histories of aborted sudden death, spontaneous ventricular ta... |
9,055 | Bi-ventricular circulatory support with the Abiomed AB5000 system in a patient with idiopathic refractory ventricular fibrillation. | A 45-year-old man had life-threatening recurrent idiopathic ventricular fibrillation and persistent cardiogenic shock develop. The episodes of ventricular fibrillation were refractory to aggressive medical management; therefore an Abiomed AB5000 bi-ventricular support system was implanted for arrhythmia control. The de... |
9,056 | Coronary arterial fistulas. | A coronary arterial fistula is a connection between one or more of the coronary arteries and a cardiac chamber or great vessel. This is a rare defect and usually occurs in isolation. Its exact incidence is unknown. The majority of these fistulas are congenital in origin although they may occasionally be detected after ... |
9,057 | Successful resuscitation of an ASA 3 patient following ropivacaine-induced cardiac arrest. | A patient with severe myocardial disease and acute-on-chronic renal failure was undergoing a brachial plexus block for formation of an arteriovenous fistula when accidental intravascular injection of ropivacaine resulted in ventricular fibrillation. Cardiopulmonary resuscitation was instituted immediately and the advan... |
9,058 | Therapeutic hypothermia after out-of-hospital cardiac arrest: experiences with patients treated with percutaneous coronary intervention and cardiogenic shock. | Therapeutic hypothermia has been shown to increase survival after out-of-hospital cardiac arrest (OHCA). The trials documenting such benefit excluded patients with cardiogenic shock and only a few patients were treated with percutaneous coronary intervention prior to admission to an intensive care unit (ICU). We use th... |
9,059 | [Implanted cardioverters-defibrillators in the treatment of arrhythmias and prevention of sudden death]. | To present 15-year experience in use of implantable cardioverters-defibrillators (ICD) in patients with life threatening arrhythmias and a high risk of sudden cardiac death (SCD).</AbstractText>A total of 151 patients (116 males and 35 females aged 12-75 years) with life threatening arrhythmias and ICD were studied.</A... |
9,060 | Importance of the autonomic nervous system in an experimental model of commotio cordis. | Young athletes may die suddenly when they are struck in the chest (commotio cordis). Proposed mechanisms of sudden death in commotio cordis include hypervagatonia and activation of the sympathetic nervous system. In an experimental model of commotio cordis, the importance of the sympathetic and parasympathetic nervous ... |
9,061 | Unrecognized anomalous origin of the left coronary artery from the pulmonary artery as a cause of ventricular fibrillation after patent ductus arteriosus ligation in an infant. | We present a case of an infant who developed ventricular fibrillation after patent ductus arteriosus (PDA) ligation. The infant had unrecognized anomalous origin of the left coronary artery from the pulmonary artery before PDA ligation. Acute reduction in systemic pulmonary artery pressures after PDA ligation resulted ... |
9,062 | Perioperative beta-blockers for preventing surgery-related mortality and morbidity: a systematic review and meta-analysis. | Perioperative beta-blockers are suggested to reduce cardiovascular mortality, myocardial-ischemia/infarction, and supraventricular arrhythmias after surgery. We reviewed the evidence regarding the effectiveness of perioperative beta-blockers for improving patient outcomes after cardiac and noncardiac surgery.</Abstract... |
9,063 | Left atrial size and risk of major cardiovascular events during antihypertensive treatment: losartan intervention for endpoint reduction in hypertension trial. | The influence of left atrial size on cardiovascular events during antihypertensive treatment has not been reported previously from a long-term, prospective, randomized hypertension treatment trial. We recorded left atrial diameter by annual echocardiography and cardiovascular events in 881 hypertensive patients (41% wo... |
9,064 | Incidence and clinical relevance of supraventricular tachyarrhythmias in pulmonary hypertension. | In patients with severe pulmonary hypertension (PH), right ventricular function is a main determinant of clinical stability and outcome. Supraventricular tachyarrhythmias (SVTs) may compromise cardiac function and threaten prognosis in patients with PH, but the incidence and clinical relevance of SVTs in PH and chronic... |
9,065 | Persistent atrial fibrillation is associated with appropriate shocks and heart failure in patients with left ventricular dysfunction treated with an implantable cardioverter defibrillator. | The objective of this study was to investigate whether persistent atrial fibrillation (AF) and new-onset AF are associated with appropriate shocks, cardiovascular mortality, chronic heart failure (CHF), and inappropriate shocks in implantable cardioverter defibrillator (ICD) patients with left ventricular dysfunction.<... |
9,066 | Atrial fibrillation in heart failure patients: prevalence in daily practice and effect on the severity of symptoms. Data from the ALPHA study registry. | Estimates of the prevalence of atrial fibrillation (AF) in heart failure (HF) originate from patients enrolled in clinical trials.</AbstractText>To assess the prevalence and clinical correlates of AF among HF patients in everyday clinical practice from HF patients screened for the T-wave ALternans in Patients with Hear... |
9,067 | Hemodynamic and neurohormonal predictors and consequences of the development of atrial fibrillation in dogs with chronic heart failure. | Heart failure increases the risk of atrial fibrillation (AF), which frequently results in heart failure progression. This prospective study examined the contribution of hemodynamic and neurohormonal activation to the spontaneous occurrence of AF in heart failure, and assessed the effects of AF on left ventricular (LV) ... |
9,068 | Role of Purkinje fibers in post-infarction ventricular tachycardia. | The objective of this study was to assess the role of Purkinje fibers in monomorphic, post-infarction ventricular tachycardia (VT).</AbstractText>Ventricular fibrillation and polymorphic VT in the setting of acute myocardial infarction (MI) may be triggered by ectopy arising from Purkinje fibers.</AbstractText>From amo... |
9,069 | Clinical syndrome suggestive of heart failure is frequently attributable to non-cardiac disorders--population-based study. | To assess how often the clinical syndrome (CS) of heart failure is attributable to alternative, including non-cardiac, explanations.</AbstractText>Cross-sectional evaluation of 739 community participants aged>or=45 years. Subjects with >or=2 symptoms or signs (dyspnoea or fatigue, orthopnoea, nocturnal paroxysmal... |
9,070 | Antithrombotic and interventional treatment options in cardioembolic transient ischaemic attack and ischaemic stroke. | Peer-reviewed data pertaining to anti-thrombotic and interventional therapy for transient ischaemic attack (TIA) or ischaemic stroke patients with non-valvular atrial fibrillation, atrial flutter, interatrial septal abnormalities, or left ventricular thrombus were reviewed. Long-term oral anticoagulant therapy with war... |
9,071 | [Electrical storms in patients with implantable cardioverter-defibrillator: incidence and clinical management]. | Electrical storm in implantable cardioverter-defibrillator (ICD) recipients is a dramatic experience for the patient and a hard emergency for the cardiology team. The aim of our study was to evaluate the incidence and the clinical significance of electrical storm in a standard population of ICD patients.</AbstractText>... |
9,072 | [Italian Network on Congestive Heart Failure: ten-year experience]. | IN-CHF is a multicenter registry, designed in 1995 to compile a large clinical database on the epidemiological, clinical characteristics, management and outcomes of heart failure outpatients. Main objectives of IN-CHF registry were to provide cardiological centers with a software to collect data of outpatients during o... |
9,073 | Using geographic information systems to evaluate cardiac arrest survival. | To evaluate cardiac arrest survival using geographical information systems (GIS) methodology.</AbstractText>Patient data were obtained from a fire district Utstein-style adult cardiac arrest registry that also included address data. All incident locations were geocoded and fire station first-due areas were mapped by us... |
9,074 | Physiologic pacing: new modalities and pacing sites. | Right ventricular (RV) apical pacing impairs left ventricular function by inducing dys-synchronous contraction and relaxation. Chronic RV apical pacing is associated with an increased risk of atrial fibrillation, morbidity, and even mortality. These observations have raised questions regarding the appropriate pacing mo... |
9,075 | Optimization of pacing algorithms to prevent and treat supraventricular tachyarrhythmias. | Preventive atrial pacing and antitachycardia pacing have been proposed for the treatment of atrial fibrillation and associated arrhythmias in patients with indications for device implantation. Preventive algorithms provide overdrive atrial pacing, reduction of atrial premature beats, and prevent short-long atrial cycle... |
9,076 | Atrial tachyarrhythmias in primary and secondary prevention ICD recipients: clinical and prognostic data. | Atrial fibrillation (AF) is the most common sustained arrhythmia encountered in clinical practice. The natural history of this disturbance and its effect on survival is still not known in patients with implantable cardioverter defibrillators (ICDs).</AbstractText>Several controlled trials for both secondary and primary... |
9,077 | Hybrid therapies for ventricular arrhythmias. | In recent years several trials demonstrated the efficacy of implantable cardioverter-defibrillation (ICD) therapy in reducing cardiac and total mortality in patients affected by rapid ventricular tachycardia (VT) and/or ventricular fibrillation. Nevertheless, ICD do not prevent arrhythmia recurrences, thus being a pall... |
9,078 | Impact of the main implantable cardioverter-defibrillator trials for primary and secondary prevention in Italy: a survey of the national activity during the years 2001-2004. | Several trials demonstrated the lifesaving role of implantable cardioverter-defibrillator (ICD) in high-risk groups of patients. Aim of this review was to report the clinical characteristics of patients enrolled in the ICD Registry of the Italian Association of Arrhythmology (AIAC) in the years 2001-2004.</AbstractText... |
9,079 | Myocardial ischemia and ventricular fibrillation: pathophysiology and clinical implications. | Ventricular fibrillation (VF) and myocardial ischemia are inseparable. The first clinical manifestation of myocardial ischemia or infarction may be sudden cardiac death in 20-25% of patients. The occurrence of potentially lethal arrhythmia is the end result of a cascade of pathophysiological abnormalities that result f... |
9,080 | [Cardioverter-defibrillator implantation in a patient with persistent left superior vena cava--a case report]. | A case of a successful implantation of cardioverter-defibrilator using the persistent left superior vena cava is presented. After six month of follow-up pacing and sensing parameters remained constant. |
9,081 | Atrial fibrillation in hypertrophic cardiomyopathy: mechanisms, embolic risk and prognosis. | Hypertrophic cardiomyopathy (HCM) is associated with an increased incidence of supraventricular and ventricular arrhythmias. Atrial fibrillation (AF) is the most common arrhythmia in HCM with a prevalence of 20% and an annual incidence of two percent per year. Increased left atrial size and volume along with impaired l... |
9,082 | Right ventricular pacing and the risk of heart failure in implantable cardioverter-defibrillator patients. | Right ventricular (RV) pacing in implantable cardioverter-defibrillator (ICD) patients may have detrimental effects on morbidity and mortality, in particular by inducing heart failure (HF).</AbstractText>We investigated whether RV pacing increases the risk of HF in an asymptomatic ICD population.</AbstractText>We evalu... |
9,083 | Utstein style analysis of out-of-hospital cardiac arrest--bystander CPR and end expired carbon dioxide. | The aim of this prospective cohort study was to describe the outcome for patients with out-of-hospital cardiac arrest in Maribor (Slovenia) over a 4 year period using a modified Utstein style, and to investigate elementary knowledge of basic life support among potential bystanders in our community.</AbstractText>Throug... |
9,084 | Real-time detection and alerting for acute ST-segment elevation myocardial ischemia using an implantable, high-fidelity, intracardiac electrogram monitoring system with long-range telemetry in an ambulatory porcine model. | The purpose of this study was to evaluate feasibility of using real-time, high-fidelity, intracardiac electrogram monitoring from a permanently implantable ischemia detection system (IIDS), with long-range telemetry capability to detect ST-segment shifts associated with acute or subacute coronary occlusion in a porcine... |
9,085 | Effect of defibrillation testing on management during implantable cardioverter-defibrillator implantation. | Verification of defibrillation efficacy by defibrillation threshold (DFT) testing during implantable cardioverter-defibrillator implantation is the current standard. Generally, defibrillation of ventricular fibrillation at 10 J below the maximum output of a device is felt to establish an adequate safety margin. Nonethe... |
9,086 | [On the possibility of amiodarone use in some cases of persistent atrial fibrillation]. | Aim of the study was to investigate mechanisms of amiodarone action on atrial and ventricular rhythm during persistent atrial fibrillation (PAF), and to assess efficacy of amiodarone as monotherapy or in combination with digoxin. Holter ECG monitoring and registration of high resolution ECG with construction of periodo... |
9,087 | Effect of acetylcholine and ischaemia/reperfusion injury on the heart of rats with STZ-induced experimental diabetes. | To investigate the effect of acetylcholine (ACh) and ischaemia/reperfusion injury on functional changes and dysrhythmias of the isolated diabetic rat heart.</AbstractText>On retrogradely perfused hearts isolated from 10-week-old diabetic rats (streptozotocin 30 mg/kg b.w. for three consecutive days i.p.), two types of ... |
9,088 | Increasing use of cardiopulmonary resuscitation during out-of-hospital ventricular fibrillation arrest: survival implications of guideline changes. | The most recent resuscitation guidelines have sought to improve the interface between defibrillation and cardiopulmonary resuscitation; the survival impact of these changes is unknown, however. A year before issuance of the most recent guidelines, we implemented protocol changes that provided a single shock without rhy... |
9,089 | Acute volume overload elevates T-wave alternans magnitude. | The objective of this study was to determine whether acute volume loading elevates T-wave alternans (TWA) in dogs with structurally normal hearts. TWA predicts sudden cardiac arrest in patients with left ventricular dysfunction and congestive heart failure. However, volume load and ventricular stretch may themselves pr... |
9,090 | Blockade of atrial-specific K+-currents increases atrial but not ventricular contractility by enhancing reverse mode Na+/Ca2+-exchange. | AVE0118 (2'-{[2-(4-Methoxy-phenyl)-acetylamino]-methyl}-biphenyl-2-carboxylic acid (2-pyridin-3-yl-ethyl)-amide) blocks atrial ultrarapid delayed rectifier currents (I(Kur)) and prolongs the atrial action potential (AP) plateau without affecting ventricular repolarisation. In patients with atrial contractile dysfunctio... |
9,091 | [Pediatric advanced life support]. | Advanced life support (ALS) includes all the procedures and maneuvers used to restore spontaneous circulation and breathing, thus minimizing brain injury. The fundamental steps of ALS are airway control with adjuncts, ventilation with 100% oxygen, vascular access and fluid and drug administration, and monitoring to dia... |
9,092 | Restoring normal sinus rhythm in atrial fibrillation : evidence from pharmacologic therapy and catheter ablation trials. | Although clinical evidence indicates that many of the electrophysiologic and functional changes associated with atrial fibrillation (AF) can be reversed by maintaining normal sinus rhythm (NSR), a series of large-scale randomized trials failed to demonstrate that this strategy provides a survival advantage. These studi... |
9,093 | Study of pathogenesis of ventricular arrhythmia in experimental rats by separation of sinus and ventricular substitutional rhythms. | Pathogenesis of cardiac arrhythmia was determined by EEC changes after ATP-induced complete atrioventricular block. The re-entry mechanism underlays extrasystoles with equal coupling intervals with complexes of ventricular substitution rhythms, which transformed into paroxysmal tachycardia with equal R-R intervals, ven... |
9,094 | Positive troponin-T in noncompaction is associated with neuromuscular disorders and poor outcome. | Though cardiac troponin-T may be positive in hypertrophic and dilated cardiomyopathy, it is not known how often troponin-T is positive in left ventricular hypertrabeculation/ noncompaction (LVHT), an unclassified cardiomyopathy. This retrospective study aimed to assess how often troponin-T is positive in LVHT, is assoc... |
9,095 | Long-term survival after right ventricular infarction. | Right ventricular myocardial infarction (RVMI) is associated with substantial in-hospital and first-year mortality, but few published studies have documented late survival to 5 to 10 years after infarction. We retrospectively identified 69 consecutive patients from Olmsted County, Minnesota, with new RVMI diagnosed bet... |
9,096 | [Natural history of and risk factors for idiopathic atrial fibrillation recurrence (FAP Registry)]. | The natural history of idiopathic atrial fibrillation is not well understood. The aim of this study was to investigate the frequency of and risk factors for disease recurrence.</AbstractText>The study involved 115 patients with a first episode of paroxysmal atrial fibrillation of unknown origin who were included the FA... |
9,097 | Long-term sinus rhythm maintenance after cardioversion of persistent atrial fibrillation: is the treatment's success predictable? | The aim of our study was to identify the clinical and echocardiographic predictors of long-term success of cardioversion in patients with persistent atrial fibrillation (AF). Our study comprised 104 patients (F/M 33/71; mean age 60.4 +/- 7.9 years) assigned to SR restoration and maintenance with sequentially administer... |
9,098 | Prevention of new-onset atrial fibrillation and its predictors with angiotensin II-receptor blockers in the treatment of hypertension and heart failure. | Atrial fibrillation is the most frequent occurring sustained cardiac arrhythmia and it is related to common cardiac disease conditions. Hypertension increases the risk of atrial fibrillation by approximately two-fold and, because of the high prevalence of hypertension, it accounts for more cases of atrial fibrillation ... |
9,099 | Utility of microvolt T-wave alternans to predict sudden cardiac death in patients with cardiomyopathy. | Sudden cardiac death remains a major cause of mortality among patients with cardiomyopathy and implantable cardioverter-defibrillator therapy has been shown to improve survival in these patients. Effective use of prophylactic implantable cardioverter-defibrillator therapy requires accurate risk stratification beyond as... |
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