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- - 2010
This review examines whether the use of automated external defibrillators by first-responders improves the survival of adults who suffer cardiopulmonary arrest. We also examined the risks associated with these devices, based on a review of the literature using the standard Prescrire methodology. Automated external defibrillators detect ventricular fibrillation with almost ...
Parade U - - 2010
HISTORY AND ADMISSION FINDINGS: A 65-year-old male patient with rapid increasing shortness of breath and newly diagnosed atrial fibrillation was admitted to our hospital. INVESTIGATIONS: The ECG revealed atrial fibrillation. Echocardiography showed severe decreased left ventricular function. The magnetic resonance imaging (MRI) scan confirmed the severe reduced left ventricular function ...
Bardy Gust H - - 2010
BACKGROUND: Implantable cardioverter-defibrillators (ICDs) prevent sudden death from cardiac causes in selected patients but require the use of transvenous lead systems. To eliminate the need for venous access, we designed and tested an entirely subcutaneous ICD system. METHODS: First, we conducted two short-term clinical trials to identify a suitable device ...
Jimenez Alejandro - - 2010
We describe a case of pacemaker/implantable cardioverter-defibrillator (ICD) interaction in a single system causing failure to detect induced ventricular fibrillation (VF) in an 83-year-old man with ischemic cardiomyopathy. He underwent an ICD generator replacement due to battery depletion. In addition, a right atrial lead was placed to treat symptomatic bradycardia. ...
Lochy Stijn - - 2010
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease where therapy with an internal cardioverter defibrillator (ICD) is frequently indicated, but the use of these devices is often challenged because of sensing dysfunction with low right ventricular sensing amplitude. We present the case of an ARVC patient in whom ICD sensing ...
Murgatroyd Francis D - - 2010
AIMS: The Secura ICD and Consulta CRT-D are the first defibrillators to have automatic right atrial (RA), right ventricular (RV), and left ventricular (LV) capture management (CM). Complete CM was evaluated in an implantable cardioverter defibrillator (ICD) population. METHODS AND RESULTS: Two prospective clinical studies were conducted in 28 centres ...
Li Yongqin - - 2010
OBJECTIVE: The current standard of manual chest compression during cardiopulmonary resuscitation requires pauses for rhythm analysis and shock delivery. However, interruptions of chest compression greatly decrease the likelihood of successful defibrillations, and significantly better outcomes are reported if this interruption is avoided. We therefore undertook a prospective randomized controlled animal ...
Takahashi Atsushi - - 2010
Previous studies indicated that women were less likely to experience ventricular arrhythmia recurrence than men among patients with coronary artery disease and implantable cardioverter defibrillator (ICD). However, it is not clear whether the risk for ventricular tachyarrhythmia is gender-dependent in patients with nonischemic dilated cardiomyopathy. This study included 173 consecutive ...
Lederer W - - 2010
Improved microcirculatory reperfusion in patients with ventricular fibrillation (VF) enhances the electrical activity of the fibrillation process and increases the likelihood of successful defibrillation. Changes in amplitude spectrum area (AMSA) and mean fibrillation (MF) in patients with sustained VF were analysed after administration of rt-PA variant tenecteplase in out-of-hospital cardiac ...
Niemann James T - - 2010
The purpose of this study was to measure the local electrical field or potential gradient, measured with a catheter-based system, required to terminate long duration electrically or ischaemically induced ventricular fibrillation (VF). We hypothesized that prolonged ischaemic VF would be more difficult to terminate when compared to electrically induced VF ...
Nair Krishnakumar - - 2010
Two cases of "locked-in" sensitivity in the managed ventricular pacing mode are reported. Patient A was a 22-year-old man with a history of hypertrophic obstructive cardiomyopathy and a prophylactic dual-chamber automatic implantable cardioverter-defibrillator who manifested paradoxic T-wave oversensing on the ventricular lead at a sensitivity setting of 1.2 mV but ...
Choy Bonnie - - 2010
Obesity has been identified as a risk factor for cardiovascular disease and heart failure. However, data regarding the relation of body mass index (BMI) to outcome in patients with established heart failure are conflicting. We examined the risk of all-cause mortality and sudden cardiac death (SCD) in 1,231 patients after ...
Lin Lian-Yu - - 2010
AIMS: Repeated failed shocks for ventricular fibrillation (VF) in out-of-hospital cardiac arrest (OOHCA) can worsen the outcome. It is very important to rapidly distinguish between early and late VF. We hypothesised that VF waveform analysis based on detrended fluctuation analysis (DFA) can help predict successful defibrillation. METHODS: Electrocardiogram (ECG) recordings ...
Obeyesekere Manoj N - - 2010
INTRODUCTION: Implantable cardioverter defibrillators (ICD) significantly reduce mortality in patients with left ventricular (LV) dysfunction. However, little is known of the predictors of appropriate device activation in the primary prevention population. The aim of the present study was to determine predictors of appropriate device therapy in patients receiving ICDs for ...
Val-Mejias Jesus E - - 2010
Advanced cardiac disease, entailing more hypertrophy, fibrosis, scarring, dilatation and conduction delays, poses the question of whether defibrillation thresholds (DFTs) increase as left ventricular ejection fraction (LVEF) decreases. This question has been approached indirectly or insufficiently in previous studies. In this study we add and expand on our previous work, ...
Ota Hisanobu - - 2010
In December 2007, a woman was involved in a traffic accident. At first, her vital signs were normal, but electrocardiogram showed ST-segment elevation in the inferior leads. She was diagnosed as a blunt chest trauma-induced myocardial infarction. Her right coronary angiography showed total occlusion. She underwent an emergency coronary artery ...
Berlot G - - 2010
Evidence of cardiovascular toxicity is present in the majority of tricyclic antidepressant overdoses. We report the case of a 63-year-old woman admitted to our department with a severe amitriptyline poisoning. The ECG at admission showed a pattern mimicking an acute anteroseptal subepicardial infarction. This pattern persisted for 11 days. Myocardial ...
van Els?cker Andr? - - 2010
Programming maximum right ventricular output in a patient with a biventricular implanted cardioverter defibrillator resulted in ventricular oversensing and ventricular safety pacing in the same cardiac cycle.
Ota Masaki - - 2010
A 67-year-old man suffered an acute anteroseptal myocardial infarction complicated by multiple episodes of ventricular fibrillation, which were not systematically defibrillated by maximum, internal 35-J shocks delivered by an implanted cardioverter defibrillator (ICD). He had suffered from acute inferior myocardial infarction 6 years earlier, complicated with sustained polymorphic ventricular tachycardia ...
Hanefeld Christoph - - 2010
Immediate defibrillation is the decisive determinant of prognosis in patients suffering from cardiac/circulatory arrest caused by ventricular fibrillation (VF). Therefore, various national and international associations recommend that first responders use defibrillators as soon as possible and also recommend public access to early defibrillation programmes. Here we report the results of ...
Van Herendael Hugo - - 2010
Amiodarone has emerged as the leading antiarrhythmic therapy for termination and prevention of ventricular arrhythmia in different clinical settings because of its proven efficacy and safety. In patients with shock refractory out-of-hospital cardiac arrest and hemodynamically destabilizing ventricular arrhythmia, amiodarone is the most effective drug available to assist in resuscitation. ...
Nakstad Anders Rostrup - - 2010
A 48-year-old previously healthy woman suffered witnessed cardiac arrest in hospital. She achieved return of spontaneous circulation and was transferred to the intensive care unit. During the following 3 hours, she suffered a cardiac electrical storm with 98 episodes of Torsade de Pointes ventricular tachycardia rapidly degenerating to ventricular fibrillation. ...
Sherrid Mark V - - 2009
Electrocardiographic (ECG) abnormalities are common in hypertrophic cardiomyopathy (HC) and have been associated with the distribution of left ventricular hypertrophy and myocardial fibrosis. Such abnormalities may predispose patients to electrophysiologic instability, ventricular arrhythmias, and sudden cardiac death (SCD). We studied 330 patients with HC who were judged clinically to be ...
Dosdall Derek J - - 2010
While reentry within the ventricular myocardium (VM) is responsible for the maintenance of short-duration ventricular fibrillation (SDVF; VF duration <1 minute), Purkinje fibers (PFs) are important in the maintenance of long-duration ventricular fibrillation (LDVF; VF duration >1 minute). The purpose of this study was to test the hypothesis that the ...
Kamath Ganesh S - - 2009
The implantable cardioverter-defibrillator (ICD) therapy is an established intervention for the prevention of sudden cardiac death (SCD) in patients with significant left ventricular dysfunction. Multiple randomized clinical trials have studied the use of ICD for the primary and secondary SCD. These studies were performed in patients with left ventricular dysfunction ...
Ayoub Chakib M - - 2009
BACKGROUND AND OBJECTIVE: Ventricular fibrillation is common after aortic cross-clamp release in patients undergoing open-heart surgeries. The aim of the study was to evaluate the efficacy of the prophylactic administration of 150 mg amiodarone by way of the pump 2 min before release of aortic cross-clamp in preventing ventricular fibrillation. ...
Khan Aslam - - 2009
Arrhythmogenic right ventricular dysplasia (ARVD), also known as arrhythmogenic right ventricular cardiomyopathy, is a genetic cause for sudden cardiac arrest. In ARVD, there is progressive replacement of normal myocytes, with fat and fibrous tissue, predominantly in the right ventricle that predisposes the individual to arrhythmias. Patients who are identified with ...
Wu Ming-Chya - - 2009
Ventricular fibrillation (VF) is known to be the most dangerous cardiac arrhythmia, frequently leading to sudden cardiac death (SCD). During VF, cardiac output drops to nil and, unless the fibrillation is promptly halted, death usually ensues within minutes. While delivering life saving electrical shocks is a method of preventing SCD, ...
Meyer Christian - - 2009
The occurrence of ventricular arrhythmias in patients with idiopathic dilated cardiomyopathy (DCM) who are treated with an implantable cardioverter-defibrillator (ICD) for primary or secondary prevention is not fully understood. In this nonrandomized, two-centre, observational study we analyzed the occurrence of ventricular arrhythmias in a total of 105 DCM patients (age, ...
Shelton Rhidian J - - 2011
Atrial fibrillation (AF) and heart failure commonly coexist. Restoring sinus rhythm using external direct current cardioversion (DCCV) may improve left ventricular function, exercise capacity and quality of life (QoL). However, DCCV may be less successful at restoring sinus rhythm in patients with heart failure. We aimed to determine whether biphasic ...
Lee Byron K - - 2009
Cardiac arrest is a vexing public health problem. Fortunately, implantable cardioverter-defibrillators (ICDs) have been proven to decrease overall mortality in several populations at high risk for cardiac arrest. However, it is still unclear how to treat patients who have an elevated risk of cardiac arrest but are not in one ...
Aktas Mehmet K - - 2009
INTRODUCTION: Implantable cardioverter-defibrillator (ICD) therapy is well established in preventing sudden cardiac death in patients with left ventricular dysfunction. The influence of right ventricular (RV) function on ICD therapy for sudden cardiac death (SCD) is not known. METHODS: We retrospectively studied 222 patients receiving an ICD for primary prevention of ...
Thiene Gaetano - - 2010
Hospital mortality for acute myocardial infarction declined from 30% to 10% in the last 30 years, thanks to coronary care units and early revascularization with thrombolysis, angioplasty, and stent implantation. Pathologists played a major role by establishing plaque rupture and coronary thrombosis as the major cause of acute myocardial infarction ...
Asaad Nidal - - 2010
We report a 33-year-old man with recurrent loss of consciousness due to ventricular tachyarrhythmia with a history of Friedreich's ataxia. The patient's symptom was improved after implantation of a single-lead implantable cardiac defibrillator. The clinical, genetic, echocardiographic, and electrocardiographic features are discussed in brief.
de Jong Jonas S S G - - 2009
BACKGROUND: Sudden cardiac death (SCD) constitutes one of the most prevalent modes of death and is mainly caused by primary ventricular fibrillation (VF), that is, VF in the acute setting of a first acute myocardial infarction (MI). Current guidelines for secondary prevention of SCD are based on data from the ...
T?rko?lu Cengizhan - - 2009
Monitoring intrathoracic impedance has become an integral part of follow-up of patients with implantable cardioverter defibrillator (ICD) or cardiac resynchronization therapy/defibrillator due to heart failure. However, several noncardiac factors may influence intrathoracic impedance. We report on an unusual cause of decrease in intrathoracic impedance in a 54-year-old male patient following ...
Tereshchenko Larisa G - - 2009
This study aimed to identify an early marker of functional impairment after an implantable cardioverter-defibrillator (ICD) shock as a predictor of heart failure progression. The ICD population has substantial risk of death due to progressive pump failure. Near-field (NF) bipolar right ventricular (RV) electrograms (EGMs) during induced ventricular fibrillation (VF) ...
Mehra Mandeep R - - 2009
Clinical guidelines recommend implantable cardioverter-defibrillators (ICDs) for selected patients with chronic left ventricular dysfunction (LVD) to improve survival, yet ICD treatment rates for eligible patients with LVD or heart failure (HF) in cardiology practices remain poorly studied. This study sought to determine patient and practice characteristics associated with ICD use ...
Van Casteren Lieve - - 2009
Sensing in pacemakers (PMs) and implantable cardioverter defibrillators (ICDs) is crucial to normal device behaviour. Since both devices treat different arrhythmias, the technical approach to signal detection is also completely different. A PM has a fixed threshold of sensing, above which events are sensed and therapy of the device withheld. ...
Coppola Giuseppe - - 2009
Isolated noncompaction of the ventricular myocardium (INVM) is an uncommon cardiomyopathy characterized by the persistence of fetal myocardium with prominent trabecular meshwork and deep intertrabecular recesses, often associated with systolic dysfunction and ventricular dilatation. A 23-year-old man from Burkina Faso was referred to our operative unit with a diagnosis of ...
Dhoble Abhijeet - - 2009
BACKGROUND: Preventing ventricular arrhythmias in patients with cardiac amyloidosis is challenging since the amyloid protein deposition in the myocardium may interfere with the normal cardiac electric excitation. Most of these patients succumb to either progressive congestive heart failure, or sudden cardiac death (SCD). Implantable cardioverter defibrillator (ICD) offers a near ...
Schuller Joseph L - - 2011
In this case report, we describe markedly fluctuating ventricular sensing through an implantable cardioverter defibrillator (ICD) over a period of 29 months in a patient with cardiac sarcoidosis. We conclude that the fluctuations in the measured R wave are the result of waxing and waning inflammation associated with sarcoid activity. The ...
Li Yongqin - - 2009
AIM OF STUDY: The waveform designs and their relative defibrillation efficacy of external biphasic waveforms may differ remarkably among manufacturers. In this study, we compared pulsed biphasic waveform (PBW) with rectilinear biphasic waveform (RBW) and their effects on terminating ventricular fibrillation (VF). METHODS: VF was electrically induced and untreated for ...
Zaman Sarah - - 2009
BACKGROUND: Methods to identify high-risk patients and timing of implantable cardioverter-defibrillator (ICD) therapy after ST-elevation myocardial infarction need further optimization. METHODS AND RESULTS: We evaluated outcomes of early ICD implantation in patients with inducible ventricular tachycardia. Consecutive patients treated with primary percutaneous coronary intervention for acute ST-elevation myocardial infarction underwent ...
Awan Zahid Aslam - - 2009
BACKGROUND: Prevention of sudden cardiac death has always been a challenge for electrophysiologists and to date, automatic implantable cardiovertor defibrillator (AICD) is found to be the only remedy. This device delivers an intracardiac shock whenever it senses a fatal ventricular arrhythmia in order to achieve sinus rhythm. If the delivery ...
Giudici Michael C - - 2010
Venous access for pectoral pacemaker and defibrillator lead placement can be compromised by venous occlusion due to previous pacing leads, access ports for medications such as chemotherapy, dialysis access, and other causes. On rare occasion, a femoral access is utilized for device placement. We report here a patient without venous ...
Nolan Jerry P - - 2009
PURPOSE OF REVIEW: To discuss recent data that may influence defibrillation in clinical practice and improve outcome after cardiac arrest from a shockable rhythm. RECENT FINDINGS: Reducing the preshock pause (interval between stopping chest compressions and shock delivery) improves shock success. The preshock pause can be reduced by continuing chest ...
Stockburger Martin - - 2009
AIMS: Data from previous defibrillator studies raised concern about right ventricular pacing (RVP) promoting heart failure progression and mortality in implantable cardioverter/defibrillator (ICD) patients. The present observational study re-examined the association of RVP, survival, and ventricular tachyarrhythmias/ventricular fibrillation (VT/VF) in routine ICD patients with restrictively programmed pacing. METHODS AND RESULTS: ...
Chaki Amber L - - 2009
The number of heart failure patients with implantable cardioverter-defibrillators is rising. Common issues encountered in this population are high defibrillation thresholds and inappropriate shocks. In order to resolve these problems, the addition of a class III antiarrhythmic such as sotalol is often considered. Given the emerging issue of polypharmacy and ...
Sucu Murat - - 2009
External electrical cardioversion was first performed in the 1950s. Urgent or elective cardioversions have specific advantages, such as termination of atrial and ventricular tachycardia and recovery of sinus rhythm. Electrical cardioversion is life-saving when applied in urgent circumstances. The succcess rate is increased by accurate tachycardia diagnosis, careful patient selection, ...
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