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500 | High-volume hemofiltration after out-of-hospital cardiac arrest: a randomized study. | The study examined the effect of isovolumic high-volume hemofiltration (HF) alone or combined with mild hypothermia (HT) on survival after out-of-hospital cardiac arrest (OHCA) with initial ventricular fibrillation or asystole.</AbstractText>Global inflammation in response to whole-body ischemia-reperfusion is common a... |
501 | Pacemaker spikes misleading the diagnosis of ventricular fibrillation. | Pacemakers are used more and more in modern cardiology, because of the increasing age of patients and the increasing number of cases of congestive heart failure treated with biventricular stimulation. Twelve lead ECG traces of electro-stimulated patients normally can be interpreted correctly, but in emergency circumsta... |
502 | Decreasing the time to defibrillation: a comparative study of defibrillator electrode designs. | Time to defibrillation (T(defib)) is the most important modifiable factor affecting survival from cardiac arrest. Mortality increases by approximately 7--10% for each minute of defibrillation delay. The purpose of this study was to determine whether defibrillator electrode design complexity affects T(defib).</AbstractT... |
503 | Phase 2 reentry in man. | Ventricular extrasystoles are characterized by a fixed coupling interval to the last QRST complex preceding it.</AbstractText>We hypothesized that this QRST complex differed from QRST complexes of other sinus beats not followed by ventricular extrasystoles. Further, we investigated whether phase 2 reentry, demonstrated... |
504 | Atrioventricular node ablation and permanent ventricular pacemaker implantation without fluoroscopy: use of an electroanatomic navigation system. | Non-fluoroscopy AV ablation and pacemaker implantation. Fluoroscopic guidance is the standard tool used for transvenous pacemaker implantations and for electrophysiological and ablation procedures. It implies X-ray exposure, occasionally with high dose of radiation for the patient and operator. We describe the case of ... |
505 | Mechanism for atrial tachyarrhythmia in chronic volume overload-induced dilated atria. | Mechanism of chronic volume overload-induced AT.</AbstractText>Atrial dilatation associated with chronic volume overload (CVO) plays an important role in the development of atrial fibrillation (AF). However, the underlying mechanisms are unknown.</AbstractText>CVO-induced atrial dilatation was created in Japanese white... |
506 | TRIad: foundation for proarrhythmia (triangulation, reverse use dependence and instability). | There exist both safe and dangerous prolongations of the QT interval. Proarrhythmia can be induced by triangulation of the cardiac action potential, reverse use dependence and instability, a set of three features termed TRIad. TRIad leads to dispersion (spatial, transmural and temporal), stalling of fast repolarization... |
507 | Cellular mechanisms of Torsade de Pointes. | Torsade de Pointes (TdP) is a life-threatening arrhythmia closely linked to abnormal cardiac repolarization. It has been demonstrated that cardiac ion channel alterations underlying cellular repolarization results in the phenotypic expression of long QT syndrome, which is closely associated with TdP. However, the mecha... |
508 | Brugada-like electrocardiographic pattern induced by an episode of anemia. | The mechanisms responsible for the undulating pattern of ST-segment elevations in the Brugada syndrome are still a matter of discussion. This report describes a young man with a Brugada-like electrocardiographic pattern. The specific ST-segment elevations were unmasked during an episode of anemia due to a duodenal ulce... |
509 | Euro heart failure survey. Medical treatment not in line with current guidelines. | It was the aim of the Euro Heart Survey on Heart Failure to assess whether patients are being treated according to current guidelines.</AbstractText>In Germany, patients were screened in 7 medical centers if their discharge diagnoses were myocardial infarction, a new episode of atrial fibrillation, or diabetes mellitus... |
510 | Correlates of left atrial size in Nigerian hypertensives. | Left atrial (LA) enlargement is a common finding in systemic hypertension and is a risk factor for the development of atrial fibrillation and stroke. We determined the correlates of LA enlargement in a Nigerian hypertensive population.</AbstractText>A total of 361 hypertensives were recruited for echocardiography. Enla... |
511 | Hepatocyte growth factor gene therapy reduces ventricular arrhythmia in animal models of myocardial ischemia. | It was recently reported that gene therapy using hepatocyte growth factor (HGF) has the potential to preserve cardiac function after myocardial ischemia. We speculated that this HGF gene therapy could also prevent ventricular arrhythmia. To investigate this possibility, we examined the antiarrhythmic effect of HGF gene... |
512 | Out-of hospital cardiac arrest in Okayama city (Japan): outcome report according to the "Utsutein Style". | The purpose of this study was to evaluate the outcomes for out-of-hospital cardiac arrest (OHCA) and cardiopulmonary resuscitation (CPR) in the city of Okayama, Japan, during a 1-year period after the reorganization of defibrillation by Emergency Life-Saving Technicians (ELSTs) with standing orders of CPR. The data wer... |
513 | Effects of atrial arrhytmias on the regurgitation of a monoleaflet prosthetic heart valve. | Many patients who receive a prosthetic heart valve also have or acquire cardiac arrhythmias. However, most in vitro studies of prosthetic valves examine them under normal rhythms. In this study, a monoleaflet prosthetic heart valve was tested in vitro under conditions that simulated normal sinus rhythm, first degree at... |
514 | Keeping current with biphasic defibrillation waveforms. | In recent years, defibrillators that use a biphasic waveform instead of the traditional monophasic waveform have become increasingly common. In fact, since we last published on this topic in 2001, most defibrillator suppliers have begun concentrating solely on developing and marketing biphasic defibrillators while phas... |
515 | [Use of levosimendan after cardiac arrest by ventricular fibrillation: a case report]. | We describe the case of a patient admitted in intensive care, after cardiac arrest by ventricular fibrillation treated by electrical defibrillation, that showed a serious deficit of the cardiac index and increase of the systemic vascular resistances. The patient was treated by levosimendan (Simdax): a starter dose of 1... |
516 | Clamikalant (Aventis). | Clamikalant is a cardioselective blocker of the ATP-dependent potassium channel (KATP) which is under development by Aventis Pharma (formerly Hoechst Marion Roussel) for the potential treatment of cardiac arrhythmia. The sodium salt, HMR-1098, is in phase II trials. Aventis plans for an iv preparation of the drug to be... |
517 | An uncommon coronary artery fistula causing survived sudden cardiac death in a young woman. | Although most patients suffering from a coronary artery fistula remain asymptomatic during childhood and adolescence, many of them develop complications in adulthood due to volume overload, endocarditis or ischemia. Here we present a young woman surviving a sudden cardiac death due to myocardial ischemia with subsequen... |
518 | Automated external defibrillators: to what extent does the algorithm delay CPR? | Maximizing cardiopulmonary resuscitation (CPR) during resuscitation may improve survival. Resuscitation protocols stack up to 3 shocks to achieve defibrillation, followed by an immediate postdefibrillation pulse check. The purpose of this study is to evaluate outcomes of rhythm reanalyses immediately after shock, stack... |
519 | Effects of a high dose intravenous bolus amiodarone in patients with atrial fibrillation and a rapid ventricular rate. | Amiodarone, given as intravenous bolus has not yet been studied in patients with atrial fibrillation and a high ventricular rate.</AbstractText>One hundred consecutive patients with atrial fibrillation and a ventricular rate above 135 bpm were randomized to receive either 450 mg amiodarone or 0.6 mg digoxin given as a ... |
520 | German origin clusters for high cardiovascular risk in an Italian enclave. | Mortality and morbidity appear to be higher in a Cimbrian population representing an enclave of people who migrated from medieval Germany to the secluded Leogra valley in Italy. A population-based study was organized, recruiting 881 elderly subjects of Cimbrian origin and comparing them with a standard control populati... |
521 | Predictors of congestive heart failure mortality in elderly people from the general population. | Congestive heart failure (CHF) is highly prevalent in the elderly. The aim of this study was to identify the predictors of CHF mortality in patients over 65 years of age who were free of CHF at initial screening. A total of 3,282 elderly subjects were recruited in a population-based frame and 12-year events were record... |
522 | Detection of repolarization alternans with an implantable cardioverter defibrillator lead in a porcine model. | Mechanistic links have been suggested between repolarization alternans (RPA) and the onset of ventricular tachycardia (VT) and/or fibrillation. Endocardial detection of RPA may, therefore, be an important step in future device-based treatments of arrhythmias. Here, we investigate if RPA could be detected during acute i... |
523 | Ventricular tachycardia ablation in patients with coronary heart disease: beyond the reentry circuit. | Patients with coronary heart disease and left ventricular dysfunction are at increased risk for the development of ventricular tachycardia (VT) related to areas of myocardial fibrosis. Although the mechanism and the circuit of this arrhythmia are well understood, little is known about the triggers that precipitate VT e... |
524 | Sinus node dysfunction concomitant with Brugada syndrome. | A genetic correlation between Brugada syndrome (BS) and sinus node dysfunction (SND) has been proposed, although the clinical and electrophysiologic characteristics of this concomitant condition are unknown.</AbstractText>The study comprised 5 patients with symptomatic BS (4 with spontaneous episodes of ventricular fib... |
525 | What is the normal range for N-terminal pro-brain natriuretic peptide? How well does this normal range screen for cardiovascular disease? | To define the N-terminal pro-brain natriuretic peptide (NTpBNP) normal range, assessing its cardiovascular screening characteristics in general population and higher risk subjects.</AbstractText>A total of 2320 subjects (1392 general population and 928 high-risk) > or =45 years old, selected randomly from seven comm... |
526 | Modulation of I(Kr) inactivation by mutation N588K in KCNH2: a link to arrhythmogenesis in short QT syndrome. | Short QT syndrome (SQTS) is characterized by ventricular arrhythmias and sudden death. One form of SQTS is caused by mutation N588K in human ether-a-go-go-related gene (HERG). In this study we sought to determine the potential role of N588K in arrhythmias.</AbstractText>We measured the characteristics of HERG current g... |
527 | Minimally invasive midaxillary muscle sparing thoracotomy for atrial septal defect closure in prepubescent patients. | Partial sternotomy, as well as posterolateral or anterolateral right-sided thoracotomy, are used for correction of selected cardiac lesions in children. However, in female patients impaired breast development after an anterolateral thoracotomy is reported, and for both the posterolateral and the anterolateral approach,... |
528 | Effect of nitric oxide synthase modulation on resuscitation success in a swine ventricular fibrillation cardiac arrest model. | We have demonstrated previously that the nitric oxide synthase (NOS) inhibitor N(G)-nitro-L-arginine (L-NNA) decreases free radical generation and nitrosative injury via peroxynitrite formation after epicardial dc shocks.</AbstractText>Our purpose was to explore the effects of NOS inhibition and NOS donation on cardiop... |
529 | [Dual atrioventricular nodal conduction and arrhythmia with severe hemodynamic alterations during liver retransplantation]. | We report the case of a man who developed tachycardia caused by atrioventricular reentry related to dual nodal conduction during liver retransplantation. The hemodynamic alterations were severe. Arrhythmia and altered cardiac conduction are potential complications of liver transplantation. The development of tachyarrhy... |
530 | Intraoperative bypass flow measurement reduces the incidence of postoperative ventricular fibrillation and myocardial markers after coronary revascularisation. | Sudden ventricular fibrillation (VF) and myocardial infarction (MI) are life-threatening complications after coronary artery bypass grafting (CABG). We prospectively analysed the impact of intraoperative bypass flow measurement with the transit time flow Doppler method (TTFD) on the incidence and outcome of postoperati... |
531 | Azimilide (Procter & Gamble). | Azimilide is a class III anti-arrhythmic agent under development by Procter & Gamble. In December 1998, the company submitted an NDA with the FDA seeking an indication for the maintenance of sinus heart rhythm in patients with various forms of supraventricular arrhythmia. By November 1997, the drug was being evalua... |
532 | Presentation and survival of prehospital apparent sudden infant death syndrome. | Prehospital providers are often involved in the resuscitation of apparent sudden infant death syndrome (SIDS) victims; however, data are few on the presentation and outcome of these patients.</AbstractText>To describe the presentation and determine the survival rate of infants who have an unwitnessed, prehospital arres... |
533 | The role of prophylactic implantable cardioverter defibrillators in heart failure: recent trials usher in a new era of device therapy. | Sudden cardiac death (SCD) manifested as ventricular fibrillation or sustained ventricular tachycardia has been a major focus of cardiovascular research for more than three decades. Although mortality in patients with heart failure (HF) caused by left ventricular systolic dysfunction has declined in recent years throug... |
534 | Restitution in mapping models with an arbitrary amount of memory. | Restitution, the characteristic shortening of action potential duration (APD) with increased heart rate, has been studied extensively because of its purported link to the onset of fibrillation. Restitution is often represented in the form of mapping models where APD is a function of previous diastolic intervals (DIs) a... |
535 | Fatal fluoxetine ingestion with postmortem blood concentrations. | A 37-year-old male ingested 12 gm of fluoxetine approximately 2 hours prior to arrival at an emergency department. The patient developed tonic-clonic seizures, which resolved with diazepam and midazolam therapy. The patient then developed profound bradycardia that progressed to ventricular fibrillation and asystole. A ... |
536 | Recurrence of symptomatic atrial fibrillation after successful catheter ablation of atrioventricular accessory pathways: a multivariate regression analysis. | The primary aim of this study is to investigate the factors related to the recurrence of atrial fibrillation (AF) after a successful ablation of atrioventricular accessory pathway. Thirty-seven patients with spontaneous AF (study group) were selected from 401 consecutive patients who underwent radiofrequency catheter a... |
537 | Repaired tetralogy of Fallot in the adult. | The majority of persons living with tetralogy of Fallot are now adults and may face a number of long-term cardiac problems that necessitate reoperation. These problems include pulmonary regurgitation, tricuspid regurgitation, ventricular tachycardia, atrial flutter and/or fibrillation, pulmonary artery branch stenoses,... |
538 | Typical ECG changes unmasked by ajmaline in a patient with Brugada syndrome and left bundle branch block. | Brugada syndrome is a channelopathy associated with right bundle branch block and ST segment elevation in the right precordial leads. These electrocardiographic signs may not be apparent most of the time but can be unmasked by certain antiarrhythmic agents. Until now, all of the reports on this syndrome have focused on... |
539 | Simulated microgravity induces microvolt T wave alternans. | There are numerous anecdotal reports of ventricular arrhythmias during spaceflight; however, it is not known whether spaceflight or microgravity systematically increases the risk of cardiac dysrhythmias. Microvolt T wave alternans (MTWA) testing compares favorably with other noninvasive risk stratifiers and invasive el... |
540 | The impact of catecholamines in patients with or without beta-blockers on the ventricular fibrillation cycle length and ventricular fibrillation cycle length variability. | To evaluate the impact of epinephrine, norepinephrine, or placebo on the ventricular fibrillation cycle length (VFCL) and the variability of VFCL (cvVFCL) measurements in implantable cardioverter defibrillator (ICD) patients with or without beta-blockers.</AbstractText>Forty-three patients scheduled for their 6-week po... |
541 | [Successful weaning from cardiopulmonary bypass with administration of landiolol hydrochloride in a patient with hypertrophic obstructive cardiomyopathy]. | A 14-yr-old boy with hypertrophic obstructive cardiomyopathy, undergoing percutaneous transluminal septal myocardial ablation suffered dissection of the left main coronary artery during the procedure. Sixty minutes after absolute ethanol administration, he was transferred to the operating room for emergency coronary ar... |
542 | Radiofrequency catheter ablation of accessory pathways during pre-excited atrial fibrillation: acute success rate and long-term clinical follow-up results as compared to those patients undergoing successful catheter ablation during sinus rhythm. | The onset of recurrent or sustained atrial fibrillation (AF) is common during electrophysiological (EP) studies of accessory pathways (AP). We report our experience in patients with Wolff-Parkinson-White (WPW) syndrome in whom AF with rapid antegrade conduction over the AP occurred during an EP study and mapping and ab... |
543 | Cholestatic liver disease modulates susceptibility to ischemia/reperfusion-induced arrhythmia, but not necrosis and hemodynamic instability: the role of endogenous opioid peptides. | <AbstractText Label="BACKGROUND/AIMS" NlmCategory="OBJECTIVE">Acute cholestasis is associated with cardiovascular complications, which mainly manifest during stressful conditions. The goal of this study is to evaluate susceptibility of 7-day bile duct-ligated rats to ischemia/reperfusion-induced injury.</AbstractText>S... |
544 | QRS duration does not predict occurrence of ventricular tachyarrhythmias in patients with implanted cardioverter-defibrillators. | The aim of this study was to determine whether QRS duration (QRSd) correlates with occurrence of ventricular arrhythmia in patients with coronary disease (CAD) receiving implantable cardioverter-defibrillators (ICDs).</AbstractText>A QRSd measured on a standard electrocardiograph (ECG) correlates with total mortality r... |
545 | [Analysis of arrhythmias in immediate post-operative period of cardiovascular surgery]. | Cardiac arrhythmias are one of the most frequent complications in the immediate post-operatory period of cardiac surgery with extracorporeal circulation, this occurring in between 35% and 50% of the patients subjected to this therapeutic intervention. Among the causal factors, electrolytic alterations, direct surgical ... |
546 | [Management of cardiac arrest in a German soccer stadium. Structural, process and outcome quality]. | In Germany there is a lack of data about the quality of emergency medical care in mass gatherings. The following report reflects our experience with management of cardiac arrest events as an example for the most critical medical emergency in a soccer stadium.</AbstractText>The Fritz-Walter Stadium is a well-known socce... |
547 | An autopsy case of isolated eosinophilic coronary periarteritis: a limited form of Churg-Strauss syndrome or a new entity? | A 52-year-old man without a history of asthma or allergic diseases died of ventricular fibrillation early in the morning. His autopsy revealed no significant findings, except for a mild mural-thickening localized at the proximal region of the right coronary artery. Microscopic examination showed periarteritis with infi... |
548 | Successful radiofrequency catheter ablation of idiopathic ventricular fibrillation presented as recurrent syncope and diagnosed by an implanted loop recorder. | As a palliative therapy, an implantable cardioverter-defibrillator (ICD) could not prevent the occurrence of ventricular tachycardia or fibrillation (VT, VF), but only suppress it by overdrive pacing or direct current shocks. Recurrent VT or VF followed by frequent ICD shocks might thus put patients in a painful disast... |
549 | The effects of pulsatile versus non-pulsatile extracorporeal circulation on the pattern of coronary artery blood flow during cardiac arrest. | In sudden cardiac arrest, the effective maintenance of coronary artery blood flow is of paramount importance for myocardial preservation as well as cardiac recovery and patient survival. The purpose of this study was to directly compare the effects of pulsatile versus non-pulsatile circulation to coronary artery flow a... |
550 | Apical hypertrophic cardiomyopathy: a case of slow flow in lad and malign ventricular arrhythmia. | The coronary slow flow phenomenon is an angiographic finding characterized by delayed distal vessel opacification in the absence of epicardial coronary artery disease. Patients often present with acute coronary syndrome. Histopathologic studies have revealed the existence of fibromuscular hyperplasia and myofibrilar hy... |
551 | Single-chamber versus dual-chamber pacing for high-grade atrioventricular block. | In the treatment of atrioventricular block, dual-chamber cardiac pacing is thought to confer a clinical benefit as compared with single-chamber ventricular pacing, but the supporting evidence is mainly from retrospective studies. Uncertainty persists regarding the true benefits of dual-chamber pacing, particularly in t... |
552 | Survival of dialysis patients after cardiac arrest and the impact of implantable cardioverter defibrillators. | Sudden cardiac death is the single largest cause of mortality in dialysis patients. There are no published data on the use or survival impact of implantable cardioverter defibrillators (ICDs) in dialysis patients. The objective of this retrospective cohort study was to determine ICD use in dialysis patients and impact ... |
553 | [Outpatient treatment of recurrent atrial fibrillation with the "pill-in-the-pocket" approach: practical aspects]. | In patients with not very frequent episodes of atrial fibrillation (AF), highly symptomatic for palpitation, hemodynamically well tolerated but long enough to require emergency room (ER) intervention, the best outpatient treatment appears to be the "pill-in-the-pocket" approach. In several studies, in-hospital administ... |
554 | [Mathematical model of cardiac action potential and its computer simulations]. | Malignant arrhythmias and ventricular fibrillation are generally accepted as one of the major causes of death in cardiovascular diseases. Based on the H-H equations, the mathematical model of the cardiac cell action potential consists of the ion channels, pumps, exchangers and transporters that are closely connected wi... |
555 | [Spontaneous rupture of common iliac artery after hysterectomy for malignant gynecologic tumor]. | Authors described a serious, iatrogenic, vessel complications after hysterectomy for uterus sarcoma. After successful abdominal hysterectomy spontaneous rupture of right common iliac artery occurred causing massive exsanguination into intraperitoneal space. During secondary laparotomy procedure large, partial loss of a... |
556 | Dronedarone (Sanofi-Synthélabo). | Sanofi-Synthelabo (formerly Sanofi) is developing the class III antiarrhythmic agent, dronedarone, for the potential treatment of atrial fibrillation and ventricular tachycardia [157842]. Phase III trials for the treatment of arrhythmia are planned for 2001 [399945]. By December 1998, phase IIb trials for the treatment... |
557 | Postmortem anatomy of the coronary sinus pacing lead. | Biventricular pacing nowadays represents a recognized method of nonpharmacological treatment of severe congestive heart failure refractory to medication. A growing number of biventricular implants is likely to bring an increasing demand for the extraction of specially designed coronary sinus (CS) leads for left ventric... |
558 | Characteristics and relevance of clustering ventricular arrhythmias in defibrillator recipients. | Studies of recurrent ventricular tachycardia and ventricular fibrillation (VT/VF) have been limited to "electrical storms," where recurrent arrhythmias necessitate repeated external cardioversions or defibrillations. Patients with an implantable cardioverter-defibrillator (ICD) may also suffer frequently recurrent arrh... |
559 | Effect of concomitant antiarrhythmic therapy on survival in patients with implantable cardioverter defibrillators. | Application of implantable cardioverter defibrillator (ICD) therapy is expanding to include both primary and secondary prevention of sudden cardiac death and has been proven to be superior to conventional antiarrhythmic therapies. Concomitant antiarrhythmic drug therapy in patients with ICD is common. These drugs are p... |
560 | Ventricular fibrillation frequency. | Ventricular-fibrillation (VF) wave frequency is known to decrease with prolonged, untreated VF. VF wave frequency is used as an algorithm to identify VF in AEDs and ICDs; yet the nature of the frequency change is not appreciated.</AbstractText>In this study, anesthetized pigs were used and VF was induced electrically. ... |
561 | [Atrial fibrillation during myocardial infarction with and without ST segment elevation]. | The occurrence of atrial fibrillation (AF) in the acute phase of myocardial infarction with ST segment elevation is common and responsible for an excess hospital mortality. The aim of this work was to define the incidence, predictive factors, and the prognostic impact of AF during MI with and without raised ST segment ... |
562 | [Analysis of the intra-hospital attending of ventricular fibrilation/ventricular taquicardia simulated events]. | To analyze the time intervals between the beginning of the Ventricular Fibrilation/Ventricular Taquicardia (VF/VT) and the main procedures made.</AbstractText>Twenty VF/VT simulations were performed and filmed in a hospital environment, using a static mannequin, on random days at random times. All teams had the same le... |
563 | Canine model of paroxysmal atrial fibrillation and paroxysmal atrial tachycardia. | Both autonomic nerve activity and electrical remodeling are important in atrial arrhythmogenesis. Therefore, dogs with sympathetic hyperinnervation, myocardial infarction (MI), and complete atrioventricular block (CAVB) may have a high incidence of atrial arrhythmias. We studied eight dogs (experimental group) with MI,... |
564 | Inter-atrial conduction time shortens after blood pressure control in hypertensive patients with left ventricular hypertrophy. | Assuming that blood pressure control could induce a shortening of the inter-atrial conduction time and prevent atrial fibrillation occurrence, we studied the inter-atrial conduction time in hypertensive patients with left ventricular hypertrophy.</AbstractText>Sixty-eight (26 male) 58.34+/-8.08-year-old patient partici... |
565 | Fuzzy logic and continuous cellular automata in warfarin dosing of stroke patients. | "Evidence-based" recommendations for warfarin prescription in patients with history of ischemic stroke limit its use to prevention of stroke due to atrial fibrillation. Warfarin is also prescribed by the authors to prevent thrombosis in stroke patients with thrombophilia and potential cardiac or arterial source for thr... |
566 | Is there an overlap between Brugada syndrome and arrhythmogenic right ventricular cardiomyopathy/dysplasia? | The Brugada syndrome is a congenital syndrome displaying an autosomal dominant mode of transmission in patients with a structurally normal heart. The disease has been linked to mutations in SCN5A , a gene located on the short arm of chromosome 3 (p21-24) that encodes for the alpha subunit of the sodium channel. The syn... |
567 | Diagnostic performance of a computer-based ECG rhythm algorithm. | We examined the accuracy of computer-based rhythm interpretation from one electrocardiograph manufacturer (GE Healthcare Technologies MUSE software 005C) in 4297 consecutive recordings in a university hospital setting. Overreading was performed by either of 2 experienced cardiologists, and all disagreements with the in... |
568 | New model of ventricular fibrillation. | The purpose of this study was to develop a more efficient and stable model of ventricular fibrillation (VF) in the isolated rabbit heart, because there is not a satisfactory model with this animal. We also observed the effects of increasing extracellular calcium in the stability and reversibility of the arrhythmia. Aft... |
569 | [Recurrent ventricular tachycardias following myocardial infarction: linear ablation strategy using an electroanatomical mapping system]. | The implantable cardioverter defibrillator (ICD) is the therapy of choice for patients with ventricular tachycardia (VT) after myocardial infarction. In some patients frequent ICD shocks occur, often resulting in clinical problems, if antiarrhythmic drugs insufficiently suppress them. Our aim was to describe electro-an... |
570 | [Severe intrahepatic cholestasis in a 66-year old male patient with medically treated atrial fibrillation]. | A 66-year-old male was admitted to hospital due to painless jaundice. Because of ischemic cardiomyopathy with paroxysmal atrial fibrillation as well as recurrent ventricular tachycardias and fibrillation he was treated with phenprocoumon and amiodarone (200 mg per day) for 2 years. Laboratory tests revealed significant... |
571 | Strain rate imaging for noninvasive functional quantification of the left atrium: comparative studies in controls and patients with atrial fibrillation. | Strain rate (SR) imaging enables quantitative measurement of left ventricular (LV) function independent of cardiac translation. However, whether SR imaging is applicable for detection of left atrial (LA) dysfunction remains unknown. The purpose of this study was to assess the feasibility of measuring LA function by SR ... |
572 | Sympathetic denervation and reinnervation after the maze procedure. | We evaluated serial changes in cardiac sympathetic nerve distribution using 123I-metaiodobenzylguanidine (123I-MIBG) after the Maze procedure. The Maze procedure, in which multiple incisions are made in the atrium, has been concomitantly performed with mitral valve (MV) surgery in an attempt to eliminate atrial fibrill... |
573 | Mitral mechanical replacement in young rheumatic women: analysis of long-term survival, valve-related complications, and pregnancy outcomes over a 3707-patient-year follow-up. | A follow-up study was performed to assess long-term survival, valve-related complications, and pregnancy outcomes in young rheumatic women undergoing isolated mitral mechanical replacement. The influence of prosthetic type on outcomes was also investigated.</AbstractText>Between 1975 and 2003, 267 isolated mitral mecha... |
574 | Organization of myocardial activation during ventricular fibrillation after myocardial infarction: evidence for sustained high-frequency sources. | Studies of ventricular fibrillation (VF) in small mammals have revealed localized sustained stationary reentry. However, studies in large mammals with surface mapping techniques have demonstrated only relatively short-lived rotors. The purpose of this study was to identify whether sustained high-frequency activation wi... |
575 | [Automated external defibrillators: perspectives and outlook]. | In Germany about 80.000 patients die of sudden cardiac death each year with enormous human, social and economic consequences. Most cases of sudden cardiac death are caused by ischemia-triggered ventricular fibrillation. A precondition for survival of the victims is an optimally and fast reacting "chain of survival". On... |
576 | [Technical requirements for early defibrillation: what are the capabilities of automated external defibrillators]. | Modern automated external defibrillators (AEDs) offer a variety of technical improvements which increase the efficacy of early defibrillation, facilitate the application by not or minimally trained persons and improve safety. The development of biphasic shocks allows better myocardial protection, the use of lithium bat... |
577 | [Resuscitation in ventricular fibrillation: what is essential?]. | Prognosis of prehospital cardiac arrest due to ventricular fibrillation is dependent on the first minutes, as survival decreases by 10% for each minute by which resuscitation attempts are delayed. Thus, early defibrillation plays a key role in improving outcome of cardiac arrest victims. The effectiveness of automated ... |
578 | Influence of Cheyne-Stokes respiration on ventricular response to atrial fibrillation in heart failure. | In subjects with sinus rhythm, respiration has a profound effect on heart rate variability (HRV) at high frequencies (HF). Because this HF respiratory arrhythmia is lost in atrial fibrillation (AF), it has been assumed that respiration does not influence the ventricular response. However, previous investigations have n... |
579 | Transient complete atrioventricular block following transvenous electrical cardioversion of atrial fibrillation in a horse. | Transvenous electrical cardioversion was attempted in a horse with drug refractory atrial fibrillation. A temporary pacing catheter and two defibrillation catheters were inserted transvenously into the right ventricular apex, the right atrium and the pulmonary artery, respectively. Under general anaesthesia 100, 200, 3... |
580 | Thoracic lavage in accidental hypothermia with cardiac arrest--report of a case and review of the literature. | Accidental hypothermia resulting in cardiac arrest poses numerous therapeutic challenges. Cardiopulmonary bypass (CPB) should be used if feasible since it optimally provides both central rewarming and circulatory support. However, this modality may not be available or is contraindicated in certain cases. Thoracic lavag... |
581 | Echocardiographic comparison of cardiopulmonary resuscitation (CPR) using periodic acceleration (pGz) versus chest compression. | This investigation compared the effects of conventional cardiopulmonary resuscitation (CPR) using an automated Thumper chest compression device to periodic acceleration CPR (pGz-CPR) on early post-resuscitation ventricular function assessed by echocardiography, in an adult pig model of CPR.</AbstractText>Whole body per... |
582 | Attenuated pediatric electrode pads for automated external defibrillator use in children. | This post-market, observational study is intended to evaluate reported uses of pediatric pads that reduce the energy delivered by some adult automated external defibrillators (AEDs) so that they may be used with pediatric patients.</AbstractText>Users of the pediatric pads were asked to report any use of the pads, even... |
583 | Ventricular fibrillation is not provoked by chest compression during post-shock organized rhythms in out-of-hospital cardiac arrest. | It has been proposed that chest compression (CC) can provoke recurrent ventricular fibrillation (VF) after defibrillation has restored an organized rhythm (OR). If so this would have major implications for proposed changes in resumption of CC after defibrillation, regardless of rhythm. The aim of this study was to exam... |
584 | A comparison of low versus high heart rate in patients with atrial fibrillation and advanced chronic heart failure: effects on clinical profile, neurohormones and survival. | Atrial fibrillation is common in chronic heart failure. Long-term restoration of sinus rhythm is generally unsuccessful. It may be speculated that higher heart rates are unfavorable, since this may lead to tachycardiomyopathy, but there are no data which have examined this.</AbstractText>Seventy-seven patients with atr... |
585 | Out-of-hospital cardiac arrest rectilinear biphasic to monophasic damped sine defibrillation waveforms with advanced life support intervention trial (ORBIT). | Although biphasic defibrillation waveforms appear to be superior to monophasic waveforms in terminating VF, their relative benefits in out-of-hospital resuscitation are incompletely understood. Prior comparisons of defibrillation waveform efficacy in out-of-hospital cardiac arrest (OHCA) are confined to patients presen... |
586 | Refining detection of drug-induced proarrhythmia: QT interval and TRIaD. | QT interval prolongation is so frequently associated with torsades de pointes (TdP) that it has come to be recognized as a surrogate marker of this unique tachyarrhythmia. However, not only does TdP not always follow QT interval prolongation, but TdP can occur even in the absence of a prolonged QT interval. Worse still... |
587 | Quantification of activation patterns during ventricular fibrillation in open-chest porcine left ventricle and septum. | A single stationary mother rotor has been hypothesized to be responsible for maintenance of ventricular fibrillation (VF) in the guinea pig. Previous studies have pointed to the ventricular septum as a possible location for a mother rotor in the pig heart.</AbstractText>The purpose of this study was to test the hypothe... |
588 | Simplified cardiac resynchronization implantation technique involving right access and a triple-guide/single introducer approach. | Biventricular pacing is useful for patients with congestive heart failure but has the disadvantage of being a long, user-dependent, highly technical procedure.</AbstractText>The purpose of this study was to simplify the procedure. The simplified technique consists of sinus (CS) venography prior to implantation, direct ... |
589 | Mechanisms of pain associated with internal defibrillation shocks: results of a randomized study of shock waveform. | Shock pain has limited the acceptance of the implantable atrial cardioverter and is a complication of ventricular implantable cardioverter-defibrillator therapy. Rounding off of the peak of a shock waveform reduces pain. Whether the pain reduction results from reduction in the peak voltage or from the rounding has not ... |
590 | Asymptomatic atrial fibrillation: demographic features and prognostic information from the Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) study. | Atrial fibrillation (AF) may occur without symptoms. Little is known about demographic features and prognostic information in patients with asymptomatic AF.</AbstractText>In the AFFIRM study, 4060 patients were randomized to either rhythm or rate control. At baseline, patients were identified as asymptomatic if they an... |
591 | Clinical factors that influence response to treatment strategies in atrial fibrillation: the Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) study. | The AFFIRM Study was a randomized multicenter comparison of 2 treatment strategies, rate-control versus rhythm-control, in high-risk patients with atrial fibrillation (AF). The primary outcome of the trial showed no overall difference in survival between strategies. However, there may be important patient subgroups for... |
592 | The immediate future for the medical treatment of atrial fibrillation. | Atrial fibrillation is the most commonly sustained cardiac arrhythmia and a common reason for mortality and morbidity. Atrial fibrillation causes disease for three reasons: i) the ventricular rate is often high, which leads to symptoms ranging from discomfort to life threatening heart failure; ii) the rhythm causes los... |
593 | Dynamics of inflammation parameters prior to tachyarrhythmias in critically ill patients. | The aim of this study was to assess the dynamics of inflammation parameters prior to a tachyarrhythmic event in critically ill patients. We evaluated the course of inflammation parameters over 48 hours before the occurrence of tachyarrhythmias.</AbstractText>Prospective observational study conducted at a cardiologic me... |
594 | [Ischemic postconditioning of the myocardium: a new method of heart protection against reperfusion damage]. | To examine effects of ischemic postconditioning on persistent ventricular fibrillation (VF) induced by reperfusion on the model of isolated rat heart.</AbstractText>Isolated by Langendorf hearts (n = 46) were ischemized for 30 min with following reperfusion. Hearts with persisting VF (n = 11) persisting to reperfusion ... |
595 | Thyrotoxicosis and the cardiovascular system. | Thyrotoxicosis is associated with increased cardiovascular morbidity and mortality, primarily due to heart failure and thromboembolism. Palpitations, caused by sinus tachycardia and occasionally by atrial fibrillation, are the most frequent cardiovascular symptom. As atrial fibrillation may be the only manifestation of... |
596 | Idiopathic premature ventricular contractions arising from the pulmonary artery: importance of mapping in the pulmonary artery in left bundle branch block-shaped ventricular arrhythmias. | A patient underwent radiofrequency (RF) catheter ablation of symptomatic idiopathic ventricular contractions (PVCs). RF energy applications at 2 sites in the right ventricular outflow tract (RVOT), where both the earliest ventricular activation and near-perfect pace mapping were obtained, did not abolish the PVC but re... |
597 | Beneficial effects of biatrial pacing on cardiac function in patients with bradycardia -- tachycardia syndrome. | Biatrial (BiA) pacing prevents atrial fibrillation. By an unknown mechanism. The purpose of this study was to use Doppler echocardiography to evaluate the hemodynamic effects during BiA pacing.</AbstractText>The subjects were 7 patients with bradycardia - tachycardia syndrome with an implanted pacemaker. Atrial pacing ... |
598 | Tako-tsubo-like left ventricular dysfunction: clinical presentation, instrumental findings, additional cardiac and non-cardiac diseases and potential pathomechanisms. | Tako-tsubo-like left ventricular dysfunction phenomenon (TTP) has primarily been described in Japan and is characterized by transient left ventricular apical ballooning in the absence of coronary artery disease, associated with chest symptoms, electrocardiographic changes and minimal cardiac enzymes release. Aim of the... |
599 | Complex-periodic spiral waves in confluent cardiac cell cultures induced by localized inhomogeneities. | Spatiotemporal wave activities in excitable heart tissues have long been the subject of numerous studies because they underlie different forms of cardiac arrhythmias. In particular, understanding the dynamics and the instabilities of spiral waves have become very important because they can cause reentrant tachycardia a... |
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