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7,900 | Pause dependent ventricular tachycardia resultant from carotid sinus massage. | In this report we describe a case of atrial flutter degenerating into ventricular fibrillation after carotid sinus pressure. Carotid sinus massage is an extremely valuable and widely used diagnostic and therapeutic modality. Although generally considered a rather benign maneuver, it is not without potential risk. |
7,901 | The electrical substrate of vagal atrial fibrillation as assessed by the signal-averaged electrocardiogram of the P wave. | The autonomic nervous system is thought to be involved in the initiation of atrial fibrillation (AF). However, there is a distinct entity of vagal AF characterized by episodes occurring at rest, postprandially, or during sleep. The purpose of this study was to compare intraatrial conduction in patients with vagally med... |
7,902 | Are nonsustained ventricular tachycardias predictive of major arrhythmias in patients with dilated cardiomyopathy on optimal medical treatment? | To evaluate the role of nonsustained ventricular tachycardias (NSVT) for the prediction of major ventricular arrhythmias (MVA) in patients with idiopathic dilated cardiomyopathy (DCM) after optimization of medical treatment.</AbstractText>Three hundred nineteen consecutive DCM patients were evaluated after adequate sta... |
7,903 | [Effects of CASI on myocardial ischemia-reperfusion arrhythmia in rats]. | To observe the protective effect of compound acanthopanax senticosus injection (CASI) on myocardial ischemia-reperfusion arrhythmia in rats.</AbstractText>The myocardial ischemia-reperfusion model was induced by 30 min coronary occulusion and 60 min reperfusion in openchest anesthetized rats. The changes of arrhythmia ... |
7,904 | Early complication after hybrid thoracic aortic aneurysm repair. | This brief report describes an unusual hybrid approach complication of aortic arch disease. An acute stent kinking in the first post-operative day promoted ventricular fibrillation and death. Adequate oversizing was achieved and intraoperative angiogram showed no proximal or distal leaks. Unfavorable outcomes are highl... |
7,905 | Left atrial myxoma presenting with ventricular fibrillation. | Coronary artery embolism with myocardial infarction is a very rare and potentially life-threatening complication of left atrial myxoma. We report the case of a 51-year-old male who presented with chest pain. Whilst awaiting medical review in the emergency department, he collapsed and a cardiac monitor revealed ventricu... |
7,906 | Effect of atrial pacing on ventricular rate during atrial fibrillation. A human study. | This research study tests the hypothesis that atrial pacing near the atrioventricular node during atrial fibrillation can affect ventricular rate.</AbstractText>In 13 patients, two monophasic action potential catheters were advanced into the low anterior septum (ANT) and the low posterior septum (POST) near the atriove... |
7,907 | Reduced incidence of new-onset atrial fibrillation with angiotensin II receptor blockade: the VALUE trial. | Atrial fibrillation (AF) is the most common arrhythmia and increases cardiovascular risk in hypertensive patients. Therefore, in the Valsartan Antihypertensive Long-term Use Evaluation (VALUE) a prespecified objective was to compare the effects of valsartan and amlodipine on new-onset AF.</AbstractText>A total of 15 24... |
7,908 | P wave dispersion is prolonged in patients with Wilson's disease. | To investigate the P wave dispersion as a non-invasive marker of intra-atrial conduction disturbances in patients with Wilson's disease.</AbstractText>We compared Wilsonos disease patients (n = 18) with age matched healthy subjects (n = 15) as controls. The diagnosis was based on clinical symptoms, laboratory tests (ce... |
7,909 | Incidence of ventricular fibrillation during left coronary arteriography in pigs: comparison of a solution of the nonionic dimer iodixanol with solutions of five different nonionic monomers. | Solutions of iodine contrast media (CM) used for selective coronary arteriography (CA) should have minimal propensity to cause ventricular fibrillation (VF). Commonly used CM for CA are nonionic monomers or dimers.</AbstractText>To compare VF propensity of ready-to-use solutions of one nonionic dimer, iodixanol, and fi... |
7,910 | Short-term normalization of ventricular repolarization by transcatheter ablation in a patient with suspected Brugada Syndrome. | We report a 30 year old male without structural heart disease who presented with recurrent nocturnal syncope and aborted sudden cardiac death. 12-lead ECG showed elevated ST in inferior leads and short coupled premature ventricular complexes (PVCs). Propafenone challenge suggested a diagnosis of an atypical Brugada syn... |
7,911 | Is defibrillation testing still necessary? A decision analysis and Markov model. | To assess the impact of defibrillation threshold (DFT) testing of implanted cardioverter-defibrillators (ICDs) on survival.</AbstractText>DFT testing is generally performed during implantation of ICDs to assess sensing and termination of ventricular fibrillation. It is common clinical practice to defibrillate ventricul... |
7,912 | Effect of single dose magnesium on arrhythmias in patients undergoing coronary artery bypass surgery. | To evaluate the safety and role of prophylactic administration of magnesium in preventing arrhythmias.</AbstractText>This double blind randomized placebo controlled clinical trial was conducted at Aga Khan University Hospital on coronary artery bypass surgery patients. All patients were connected to holter monitor befo... |
7,913 | Endoscopic thoracic sympathectomy for long QT syndrome. | A 54-year-old woman was referred to our service with intractable ventricular arrhythmias secondary to a familial long-QT syndrome. Her first presentation was 4 years previously, when she suffered a cardiac arrest, at this time an (Automatic Implantable Cardioverter Defibrillator) AICD device was inserted and she was co... |
7,914 | Systolic dysfunction in urban Japan. | Heart failure (HF), which can be caused by left ventricular systolic dysfunction (LVSD), is a growing problem in developed countries with a large aging population. The aim of the present study was to characterize outpatients with LVSD in the adult population (45-84 years) in an urban Japanese community (Niigata City), ... |
7,915 | An unusual case of isolated non-compacted right ventricular myocardium. | Isolated ventricular non-compaction is a rare type of cardiomyopathy resulting from arrested myocardial development during embryogenesis. This rare entity can be easily diagnosed by characteristic appearance of prominent myocardial trabeculations and deep inter-trabecular spaces. The clinical manifestations include hea... |
7,916 | "Torsade de pointes" during amiodarone infusion in a cirrhotic woman with a prolonged QT interval. | We describe an interesting case of a woman with decompensated cirrhosis, ischaemic heart disease and prolonged QT interval, who developed a new-onset atrial fibrillation. During amiodarone infusion a torsade de pointes occurred, which was immediately converted to sinus rhythm by synchronized cardioversion. A new episod... |
7,917 | Anatomically determined functional conduction delay in the posterior left atrium relationship to structural heart disease. | This study sought to characterize the conduction properties of the posterior left atrium (PLA) in patients with different forms of structural heart disease undergoing cardiac surgery.</AbstractText>The PLA plays an important role in the initiation and maintenance of atrial fibrillation.</AbstractText>This study include... |
7,918 | Long-term follow-up after cryothermic ostial pulmonary vein isolation in paroxysmal atrial fibrillation. | This study was designed to evaluate the long-term effect of segmental pulmonary vein (PV) cryoablation in patients with recent-onset paroxysmal atrial fibrillation (PAF).</AbstractText>Patients with PAF have more triggers to initiate and less substrate to sustain atrial fibrillation (AF). Elimination of the potential i... |
7,919 | Persistent atrial fibrillation is associated with reduced risk of torsades de pointes in patients with drug-induced long QT syndrome. | The goal of this study was to identify markers of torsades de pointes (TdP) in patients with drug-associated long QT syndrome (LQTS).</AbstractText>Drug-induced LQTS includes individuals developing marked prolongation of ventricular repolarization on exposure to an offending drug. Under these conditions, TdP develops i... |
7,920 | Atrial-selective approaches for the treatment of atrial fibrillation. | Atrial-selective pharmacologic approaches represent promising novel therapeutic options for the treatment of atrial fibrillation (AF). Medical treatment for AF is still more widely applied than interventional therapies but is hampered by several important weaknesses. Besides limited clinical efficacy (cardioversion suc... |
7,921 | Rationale and design of the Home Automatic External Defibrillator Trial (HAT). | Most cardiac arrests occur in the home, where emergency medical services (EMS) systems are challenged to provide timely care. Because a large proportion of sudden cardiac arrests (SCAs) are due to ventricular tachycardia or ventricular fibrillation, home use of an automated external defibrillator (AED) might offer an o... |
7,922 | Experimental study of pegylated liposomal hemoglobin on norepinephrine release and reperfusion arrhythmias in isolated guinea pig hearts. | Under myocardial reperfusion conditions, hemoglobin (Hb)-based artificial blood showed effectiveness for post-ischemic dysfunction. However, there are no studies about the effects of this product on reperfusion arrhythmias (ventricular fibrillation, VF) associated with norepinephrine (NE) release. This study was to eva... |
7,923 | Recurrence of mitral regurgitation parallels the absence of left ventricular reverse remodeling after mitral repair in advanced dilated cardiomyopathy. | The aim of this study was to assess the occurrence of reverse left ventricular (LV) remodeling after effective mitral valve repair in advanced dilated cardiomyopathy and its impact on clinical outcome and repair durability.</AbstractText>Of 111 patients undergoing mitral valve repair in ischemic or idiopathic dilated c... |
7,924 | [Constrictive pericarditis or restrictive cardiomyopathy? Echocardiographic tissue Doppler analysis]. | Echocardiographic tissue Doppler imaging (TDI) has been proposed for differentiating between constrictive pericarditis (CP) and restrictive cardiomyopathy (RCM). The aim of this retrospective study was to analyse TDI in patients with severe diastolic dysfunction associated with proven constrictive pericarditis or restr... |
7,925 | Characterization of in vivo and in vitro electrophysiological and antiarrhythmic effects of a novel IKACh blocker, NIP-151: a comparison with an IKr-blocker dofetilide. | We investigated the electrophysiological and antiarrhythmic effects of a novel antiarrhythmic agent, NIP-151, and compared these effects with those of an IKr-blocker dofetilide. NIP-151 potently inhibited acetylcholine-activated K current (IKACh) with an IC50, with 1.6 nM in HEK293 cells expressing the GIRK1/4 channel,... |
7,926 | [Clinical case of the month. Atrial flutter with rapid ventricular response (1:1 atrioventricular conduction) caused by flecaïnide]. | We report a case of 1:1 flutter in a patient taking flecaïnide for atrial fibrillation. We discuss the mechanism of the arrhythmia, its treatment and the preventive attitude to be adopted. |
7,927 | Survival from in-hospital cardiac arrest during nights and weekends. | Occurrence of in-hospital cardiac arrest and survival patterns have not been characterized by time of day or day of week. Patient physiology and process of care for in-hospital cardiac arrest may be different at night and on weekends because of hospital factors unrelated to patient, event, or location variables.</Abstr... |
7,928 | Effects of wall stress on the dynamics of ventricular fibrillation: a simulation study using a dynamic mechanoelectric model of ventricular tissue. | To investigate the mechanisms underlying the increased prevalence of ventricular fibrillation (VF) in the mechanically compromised heart, we developed a fully coupled electromechanical model of the human ventricular myocardium.</AbstractText>The model formulated the biophysics of specific ionic currents, excitation-con... |
7,929 | How to avoid inappropriate therapy. | With wider indications for implantable cardioverter defibrillator therapy, more patients at lower risk for ventricular tachyarrhythmia receive this treatment. To maintain the ratio of benefit versus side-effects at an acceptable level, the risk of inappropriate implantable cardioverter defibrillator therapy has to be m... |
7,930 | Clinical significance of pacemaker-detected atrial high-rate episodes. | Pacemakers currently being implanted offer several advanced diagnostic features. Among these is the ability to store counters and intracardiac electrograms of individual atrial high-rate episodes, which are a surrogate of atrial fibrillation. As the majority of these episodes are brief and asymptomatic, their clinical ... |
7,931 | Cardiac resynchronization therapy in the setting of permanent atrial fibrillation and heart failure. | Heart failure and atrial fibrillation have been called the twin modern epidemics. They are often present concomitantly and are believed to directly predispose to each other. They form a sinister synergy, and management of atrial fibrillation in the setting of heart failure is challenging; relatively new therapeutic str... |
7,932 | An unusual diagnosis of atrial shunt defect by magnetic resonance imaging. | Paroxysmal atrial arrhythmias especially atrial fibrillation are frequently encountered in adult patients with atrial septal defect. However, the diagnosis of atrial defect can be difficult. Thransthoracic echocardiography, the mostly utilized cardiac technique, has shown a limited ability to identify small atrial defe... |
7,933 | Cerebral cortical microvascular flow during and following cardiopulmonary resuscitation after short duration of cardiac arrest. | To examine changes in cerebral cortical macro- and microcirculation and their relationship to the severity of brain ischaemia during and following resuscitation from a short duration of cardiac arrest.</AbstractText>Bilateral cranial windows were created in eight domestic pigs weighing 41+/-1 kg, exposing the frontopar... |
7,934 | Evaluation of the outcome of out-of-hospital cardiac arrest resuscitation efforts in Denizli, Turkey. | The objective of this study was to evaluate the outcomes and associated factors for short-term success and long-term survival rates of resuscitated non-traumatic out-of-hospital cardiac arrest (OHCAs) in Denizli, Turkey. All non-traumatic OHCA patients from the Emergency Departments of the Pamukkale University and City... |
7,935 | Gender related differences in patients presenting with acute heart failure. Results from EuroHeart Failure Survey II. | This analysis evaluates the gender differences in patients hospitalised for acute heart failure (AHF) in the EuroHeart Failure Survey II (EHFS).</AbstractText>Of the 3580 patients included in EHFS II, 1384 (39%) were women, mean age 73 years. 2196 (61%) were men, mean age 68 years. Women more frequently had new-onset A... |
7,936 | Stroke and thromboembolism in atrial fibrillation: a systematic review of stroke risk factors, risk stratification schema and cost effectiveness data. | The risk of stroke in atrial fibrillation (AF) needs to be assessed in each patient to determine the clinical and cost-effectiveness of thromboprophylaxis, with the aim of appropriate use of antithrombotic therapy. To achieve this, stroke risk factors in AF populations need to be identified and stroke risk stratificati... |
7,937 | Improved care for patients with congestive heart failure. | Congestive heart failure (CHF) affects 4.9 million people, mostly elderly, in the United States; 550,000 new cases are diagnosed each year. Evidence-based treatment approaches offer opportunities to reduce mortality, complications, and rehospitalization rates.</AbstractText>Seven key components of care tailored to the ... |
7,938 | [Case of caffeine poisoning survived by percutaneous cardio-pulmonary support]. | A 17-year-old woman presented to the Emergency Department of our hospital following a suicide attempt. She reported having ingested 340 tablets of caffeine, each of which contained 200mg of caffeine, about 3 hours earlier. Soon after arrival, her blood pressure dropped, and electrocardiography revealed sinus tachycardi... |
7,939 | Comparison of 15:1, 15:2, and 30:2 compression-to-ventilation ratios for cardiopulmonary resuscitation in a canine model of a simulated, witnessed cardiac arrest. | This experimental study compared the effect of compression-to-ventilation (CV) ratios of 15:1, 15:2, and 30:2 on hemodynamics and resuscitation outcome in a canine model of a simulated, witnessed ventricular fibrillation (VF) cardiac arrest.</AbstractText>Thirty healthy dogs, irrespective of species (mean +/- SD, 19.2 ... |
7,940 | [Antithrombotic therapy in congestive heart failure]. | The risk of thromboembolic complications is increased in patients with advanced chronic heart failure and severe left ventricular dysfunction. Accepted indications for oral anticoagulation include patients with a history of thromboembolism, concomitant atrial fibrillation, or venous, arterial or cardiac thrombosis. In ... |
7,941 | The potential benefits of treatment of sleep apnea in heart failure. | At least half of patients with heart failure (HF) suffer from sleep apnea. Growing evidence suggests that there may be a strong pathophysiological link between chronic HF and sleep apnea due to nocturnal oxygen desaturation and sympathetic activation. It seems that sleep apnea contributes to systolic and diastolic HF, ... |
7,942 | Long-term outcome of the atrioventricular node ablation and pacemaker implantation for symptomatic refractory atrial fibrillation. | To investigate long-term outcome and to determine predictors of development of heart failure (HF) in patients with atrioventricular (AV) node ablation and permanent right ventricular pacing because of symptomatic refractory atrial fibrillation (AF).</AbstractText>Atrioventricular node ablation and subsequent permanent ... |
7,943 | Effect of acetate-free biofiltration with a potassium-profiled dialysate on the control of cardiac arrhythmias in patients at risk: a pilot study. | Cardiac arrhythmias are a frequent event in chronic hemodialysis patients. The aim of this study was to evaluate the efficacy and safety of acetate-free hemofiltration with potassium-profiled dialysate (AFB-K) dialysis compared with constant potassium acetate-free biofiltration (AFB). Twelve patients (mean age 79 years... |
7,944 | Predictors and frequency of conduction disturbances after open-heart surgery. | The risk of developing conduction disturbances after coronary bypass grafting (CABG) or valvular surgery has been well established in previous studies, leading to permanent pacemaker implantation in about 2% to 3% of patients, and in 10% of patients undergoing repeat cardiac surgery. We sought to determine the incidenc... |
7,945 | Construction and validation of a plunge electrode array for three-dimensional determination of conductivity in the heart. | The heart's response to electrical shock, electrical propagation in sinus rhythm, and the spatiotemporal dynamics of ventricular fibrillation all depend critically on the electrical anisotropy of cardiac tissue. Analysis of the microstructure of the heart predicts that three unique intracellular electrical conductances... |
7,946 | A time-dependent adaptive remeshing for electrical waves of the heart. | In this work, a time-dependent remeshing strategy and a numerical method are presented for the simulation of the action potential propagation of the human heart. The main purpose of these simulations is to accurately predict the depolarization-repolarization front position, which is essential to the understanding of th... |
7,947 | [Long term follow-up results of 199 patients with hypertrophic cardiomyopathy]. | To investigate the associations among clinical characteristics and prognosis in patients with hypertrophic cardiomyopathy (HCM).</AbstractText>Clinical and follow up data of 234 patients with HCM hospitalized in our institute from June, 1999 to March, 2006 were retrospectively analyzed.</AbstractText>A total of 199 out... |
7,948 | Role of anticoagulation therapy after pulmonary vein antrum isolation for atrial fibrillation treatment. | Atrial fibrillation (AF) increases the risk of atrioembolic stroke. However, the role of anticoagulation therapy (OAT) in preventing cerebrovascular accidents (CVA) after intracardiac echocardiography-guided pulmonary vein antrum isolation (ICE-PVAI) is still unclear. In the present study, we evaluated the incidence of... |
7,949 | Economic and health consequences of managing bradycardia with dual-chamber compared to single-chamber ventricular pacemakers in Italy. | This study sought to estimate the economic implications of managing bradycardia due to sinoatrial node disease or atrioventricular block with dual compared to single-chamber ventricular pacemakers from an Italian government perspective. Dual-chamber pacemakers lower the risk of developing atrial fibrillation and pacema... |
7,950 | Long-term follow-up of patients paced in VDD mode for advanced atrioventricular block: a pilot study. | The aim of this pilot study was to estimate the survival trend of patients implanted with VDD pacemakers, and to compare it with the survival curve of the general population of the same region.</AbstractText>Ninety-seven patients (65 male, mean age 78 +/- 6 years) with advanced atrioventricular block referred to our in... |
7,951 | [RF ablation of longstanding persistent atrial fibrillation in patient with familial dilated cardiomyopathy]. | A vicious circle of interactions between dilated cardiomyopathy and longstanding persistent AF/AFL may cause symptoms of advanced congestive heart failure. In a 31-year-old patient with diagnosis of familial dilated cardiomyopathy and permanent AF lasting for five years, gradually decreased left ventricular ejection fr... |
7,952 | Diastolic dysfunction and atrial fibrillation. | Isolated diastolic heart failure (DHF) is defined as heart failure with preserved left ventricular (LV) systolic function in the absence of valve disease. DHF is a clinical diagnosis confirmed by echocardiography and is presumed to be due to diastolic dysfunction (DD). DD is characterized by abnormalities in relaxation... |
7,953 | Endothelin system and atrial fibrillation post-cardiac surgery. | We investigated the relation between the endothelin system and atrial fibrillation.</AbstractText>Endothelin has been implicated in the pathophysiology of atrial fibrillation, but the exact role of A- and B-receptors is unknown.</AbstractText>We obtained right atrial biopsies from patients in sinus rhythm and preserved... |
7,954 | The new world of cardiac interventions: a brief review of the recent advances in non-coronary percutaneous interventions. | Advances in cardiovascular interventional techniques have allowed percutaneous treatment of conditions that either previously required open operations or have not been amenable to treatment. Conditions such as atrial and ventricular septal defects and patent foramen ovale are now amenable to percutaneous closure using ... |
7,955 | [The system of hemostasis in patients with atrial fibrillation: markers of left auricular thrombosis]. | Thrombosis of the left atrial appendage (LAA) is considered to be main cause of thromboembolic complications of atrial fibrillation (AF). Aim of this work was to study parameters of the hemostasis system in patients with AF in dependence on the presence of thrombus in the LAA. We examined 92 patients (58 men and 34 wom... |
7,956 | [Clinical efficacy of permanent cardiac pacing in patients with bradysystolic forms of disturbances of cardiac rhythm and conduction]. | From 1996 to 2002 primary implantations of pacing systems because of bradysystolic disturbances of cardiac rhythm and conduction had been carried out in 311 patients. Indications were disturbances of atrioventricular conduction in 168 and sick sinus syndrome in 143 patients. According to type of permanent pacing patien... |
7,957 | [Complications of stress-echocardiography used for diagnosis of ischemic heart disease]. | Prevalence of minor and major complications, side effects of stress echocardiography (stress-echoCG) was studied in a group of 1359 patients with suspected ischemic heart disease (IHD). Dipyridamole/atropine test was carried out in 184, dobutamine/atropine test - in 231, transesophageal atrial pacing (TEAP) - in 154, v... |
7,958 | [Metalloproteinase activity of the blood in patients with arterial hypertension with paroxysmal form of atrial fibrillation]. | Aim of the study was to investigate interrelationship between serum markers of myocardial fibrosis: matrix metalloproteinase -1 (MMP-1), tissue inhibitor of metalloproteinase-1 (TIMP-1) and parameters of echocardiography in patients with arterial hypertension (AH) and paroxysmal form of atrial fibrillation (n=39). We r... |
7,959 | [Autotransplantation of the heart as the method of treatment of congestive heart failure]. | Congestive heart failure with preserved or moderately lowered left ventricular pump function in some patients is caused by mitral regurgitation. Its consequences are left atrial dilation, pulmonary hypertension, tricuspid regurgitation, thromboembolic complications, disturbances of rhythm with elevated risk of sudden d... |
7,960 | [Arrhythmias in pregnancy: etiology and perinatal outcomes]. | We analysed 132 case forms of pregnant women who delivered in a special maternity hospital for patients with cardiovascular diseases. Complex disorders of heart rhythm (paroxysmal supraventricular tachycardia, atrial fibrillation, frequent ventricular extrasystoles, and II - III degree atrioventricular block) were reve... |
7,961 | [The role of omega-3 fatty acids from fish in prevention of cardiovascular diseases]. | Fish and fish oil are rich sources of omega-3 fatty acids--essential polyunsaturated fatty acids. These acids in doses of 1 g per day have been shown to significantly reduce the all-cause mortality in post myocardial infarction (MI) patients and the risk for sudden death caused by cardiac arrhythmias. One of the recent... |
7,962 | Sudden cardiac death caused by migration of a TrapEase inferior vena cava filter: case report and review of the literature. | A 43-year-old female presented with sudden onset of palpitations, chest pain, and shortness of breath associated with hypoxemia. A helical computed tomography (CT) scan of the chest revealed a large saddle pulmonary embolism. Intravenous tPA relieved the shortness of breath and improved the hypoxemia. Inferior vena cav... |
7,963 | Haemodynamic impact of the left ventricular pacing site during graded ischaemia in an open-chest pig model. | In post-operative setting after cardiac surgery, the choice of the optimal ventricular pacing site remains an issue, particularly in patients with ischaemic cardiomyopathy. We aimed to investigate the impact of the left ventricular (LV) pacing site in an animal model of incremental myocardial ischaemia.</AbstractText>T... |
7,964 | Risk stratification after myocardial infarction: a new method of determining the neural component of the baroreflex is potentially more discriminative in distinguishing patients at high and low risk for arrhythmias. | We hypothesize that the neural component (NC) of the baroreflex sensitivity (BRS) is a better risk stratifier for ventricular tachycardia/fibrillation (VT/VF) than conventional BRS itself, because it is both independent of vessel wall stiffness and can be measured non-invasively.</AbstractText>NC was determined by corr... |
7,965 | Atrial fibrillation in left ventricular noncompaction with and without neuromuscular disorders is associated with a poor prognosis. | The study in patients with left ventricular hypertrabeculation/noncompaction (LVHT) aimed to compare patients with and without atrial fibrillation (AF) regarding prevalence of neuromuscular disorders (NMD), cardiac symptoms, electrocardiographic (ECG) findings, left ventricular function, location and extension of LVHT ... |
7,966 | [Health effects of occupational exposure to static magnetic fields used in magnetic resonance imaging: a review]. | Magnetic resonance imaging is an established diagnostic tool involving exposure to static magnetic fields (SMF) of patients and health personnel (radiology technicians, radiologists, anaesthetists, surgeons, maintenance staff). Occupational exposure to SMF will be governed by the rules of European Union Directive 2004/... |
7,967 | [In-hospital prognosis of right ventricular myocardial infarction]. | To identify prognostic risk factors for in-hospital outcome of right ventricular myocardial infarction (RVI).</AbstractText>A retrospective study of 20 patients admitted with acute myocardial infarction with a RVI defined by ST segment elevation > or = 1 mm in V3R and V4R leads.</AbstractText>The mean age was 62 yea... |
7,968 | Thiazolidinedione drugs block cardiac KATP channels and may increase propensity for ischaemic ventricular fibrillation in pigs. | <AbstractText Label="AIMS/HYPOTHESIS" NlmCategory="OBJECTIVE">Opening of ATP-sensitive potassium (K(ATP)) channels during myocardial ischaemia shortens action potential duration and is believed to be an adaptive, energy-sparing response. Thiazolidinedione drugs block K(ATP) channels in non-cardiac cells in vitro. This ... |
7,969 | Public health impact of full implementation of therapeutic hypothermia after cardiac arrest. | Induced hypothermia improves outcomes in patients resuscitated successfully after cardiac arrest due to ventricular fibrillation. However, a minority of US physicians currently use the therapy. The aim of this study was to project the public health impact of implementing hypothermia in all eligible US out-of-hospital c... |
7,970 | The intrinsic resistance of female hearts to an ischemic insult is abrogated in primary cardiac hypertrophy. | Important sex differences in cardiovascular disease outcomes exist, including conditions of hypertrophic cardiomyopathy and cardiac ischemia. Studies of sex differences in the extent to which load-independent (primary) hypertrophy modulates the response to ischemia-reperfusion (I/R) damage have not been characterized. ... |
7,971 | Prediction of unexpected sudden death among healthy dogs by a novel marker of autonomic neural activity. | Unexpected sudden death among apparently healthy individuals remains a daunting problem. We have previously shown that autonomic modulation of cardiac arrhythmias and autonomic markers, such as baroreflex sensitivity (BRS) and heart rate variability (HRV), carry predictive power after myocardial infarction.</AbstractTe... |
7,972 | Prophylactic implantation of cardioverter-defibrillator in patients with severe cardiac amyloidosis and high risk for sudden cardiac death. | Cardiac light-chain amyloidosis carries a high risk for death predominantly from progressive cardiomyopathy or sudden death (SCD). Independent risk factors for SCD are syncope and complex nonsustained ventricular arrhythmias.</AbstractText>The purpose of this study was to test whether prophylactic placement of an impla... |
7,973 | Endovascular treatment of an intramural aortic haematoma following cardiopulmonary resuscitation for myocardial ischemia with ventricular fibrillation. | Cardiopulmonary resuscitation by manual cardiac compression can restore cardiocirculatory function but can also injure patients. Commonly reported are skeletal fractures of the rips and sternum, while injuries to the large thoracic vessels will frequently be lethal. We report the case of a 57-year-old male patient with... |
7,974 | Non-selective cyclooxygenase inhibition before periodic acceleration (pGz) cardiopulmonary resuscitation (CPR) in a porcine model of ventricular fibrillation. | Whole body periodic acceleration (pGz) along the spinal axis is a novel method of cardiopulmonary resuscitation (CPR). Oscillatory motion of the supine body in a horizontal fashion provides ventilation and blood flow to vital organs during cardiac arrest and pulsatile shear stress to the vascular endothelium. We previo... |
7,975 | Genotype-phenotype analysis and natural history of left ventricular hypertrophy in LEOPARD syndrome. | Because it is unclear whether the genotype may influence the clinical course in patients with LEOPARD syndrome (LS), we analyzed clinical and molecular predictors of adverse cardiac events in patients with left ventricular hypertrophy (LVH). A comprehensive cardiovascular evaluation, including baseline electrocardiogra... |
7,976 | Antiarrhythmic activity of n-tyrosol during acute myocardial ischemia and reperfusion. | Antiarrhythmic activity of n-tyrosol was demonstrated on the model of early occlusion and reperfusion arrhythmia. The preparation reduces the incidence of ventricular tachycardia and fibrillation, increases the percent of animals without ventricular arrhythmia, and moderates the severity of developing ventricular arrhy... |
7,977 | Biphasic versus monophasic shock for external cardioversion of atrial flutter: a prospective, randomized trial. | External cardioversion is effective to terminate persistent atrial flutter. Biphasic shocks have been shown to be superior to monophasic shocks for ventricular defibrillation and atrial fibrillation cardioversion. The purpose of this trial was to compare the efficacy of rectilinear biphasic versus standard damped sine ... |
7,978 | The predictive value of transthoracic echocardiographic variables for sinus rhythm maintenance after electrical cardioversion of atrial fibrillation. Results from the CAPRAF study, a prospective, randomized, placebo-controlled study. | The recurrence rate of atrial fibrillation after electrical cardioversion is disappointingly high. The aim of the present study was to prospectively investigate if standard echocardiographic variables at the day of cardioversion could predict sinus rhythm maintenance.</AbstractText>Transthoracic echocardiographic exami... |
7,979 | Association of impaired thrombolysis in myocardial infarction myocardial perfusion grade with ventricular tachycardia and ventricular fibrillation following fibrinolytic therapy for ST-segment elevation myocardial infarction. | The goal of this analysis was to evaluate the association of impaired Thrombolysis In Myocardial Infarction myocardial perfusion grade (TMPG) with sustained ventricular tachycardia (VT) or ventricular fibrillation (VF).</AbstractText>Impaired TMPG after successful restoration of epicardial flow among patients treated w... |
7,980 | Heart transplantation in hypertrophic cardiomyopathy. | Heart transplantation (HT) is the sole therapeutic option for selected patients with hypertrophic cardiomyopathy (HC) and refractory heart failure. However, the results of HT have not been systematically investigated in HC. We assessed the pathophysiologic profile of HT candidates and the outcome after transplantation ... |
7,981 | Long term outcome of cavotricuspid isthmus cryoablation for the treatment of common atrial flutter in 180 patients: a single center experience. | Recent literature has shown that common type atrial flutter (AFL) can recur late after cavotricuspid isthmus (CTI) catheter ablation using radiofrequency energy (RF). We report the long term outcome of a large group of patients undergoing CTI ablation using cryothermy for AFL in a single center.</AbstractText>Patients ... |
7,982 | QT/RR relationship in patients after remote anterior myocardial infarction with left ventricular dysfunction and different types of ventricular arrhythmias. | QT/RR relationship was found to be both rate-dependent and rate-independent, what suggests the influence of autonomic drive and other not-autonomic related factors on it. The steeper QT/RR slope in patients after acute myocardial infarction (MI) was described, but the relationship to ventricular arrhythmias is unknown.... |
7,983 | Cardiac arrhythmias imprint specific signatures on Lorenz plots. | Despite the growing number of studies using Lorenz (Poincaré) plots (LPs) for the analysis of heart rate variability (HRV), a possible correlation between the underlying ECG waveforms and the RR scatter plots has never been systematically studied. We report a comprehensive investigation of distinct Lorenz plot pat... |
7,984 | Limited clinical utility of Holter monitoring in patients with palpitations or altered consciousness: analysis of 8973 recordings in 7394 patients. | To determine the clinical utility of 24 hour Holter monitoring by measuring the frequency of candidate arrhythmias recorded during the investigation of palpitations and altered consciousness.</AbstractText>Of 9,729 Holter recordings, reports were available in 8,973 (92.2%) performed in the 7394 patients who comprise th... |
7,985 | P-wave duration and dispersion in obese subjects. | Although previous studies have documented a variety of electrocardiogram (ECG) abnormalities in obesity, P-wave alterations, which represent an increased risk for atrial arrhythmia, have not been studied very well in these patients. The aim of the present study was to evaluate P-wave duration and P dispersion (Pd) in o... |
7,986 | Implantable cardioverter defibrillators save lives from lightning-related electrocution too! | We report an unusual case of a 75-year-old male electrocuted by lightning strike rescued by implantable cardioverter defibrillator (ICD) shock coincidentally. Lightning strikes are an unusual cause of fatal cardiac arrhythmias. Depending on the amount of energy and the current vector affecting the heart, the arrhythmia... |
7,987 | Mechanisms of ventricular fibrillation initiation in MADIT II patients with implantable cardioverter defibrillators. | The availability of stored intracardiac electrograms from implantable defibrillators (ICDs) has facilitated the study of the mechanisms of ventricular tachyarrhythmia onset. This study aimed to determine the patterns of initiation of ventricular fibrillation (VF) in Multicenter Automatic Defibrillator Implantation Tria... |
7,988 | Removal of CPR artifacts from the ventricular fibrillation ECG by adaptive regression on lagged reference signals. | Removing cardiopulmonary resuscitation (CPR)-related artifacts from human ventricular fibrillation (VF) electrocardiogram (ECG) signals provides the possibility to continuously detect rhythm changes and estimate the probability of defibrillation success. This could reduce "hands-off" analysis times which diminish the c... |
7,989 | Efficacy of automatic mode switching in DDDR mode pacemakers: the most 2 study. | Effective automatic mode switching (AMS) algorithms capable of detecting a range of supraventricular tachyarrhythmias is important given evidence of atrial fibrillation (AF), atrial flutter (AFL), and atrial tachycardia (AT) post-implantation of pacemakers.</AbstractText>The aim of the study was to assess the efficacy,... |
7,990 | The Northern Ireland Public Access Defibrillation (NIPAD) study: effectiveness in urban and rural populations. | To assess the impact of mobile automated external defibrillators (AEDs) on out-of-hospital cardiac arrests (OHCAs) in urban and rural populations.</AbstractText>Prospective before and after intervention, population study.</AbstractText>Urban and rural areas of 160,000 each. Patients, interventions and</AbstractText>In ... |
7,991 | A case of vagally mediated idiopathic ventricular fibrillation. | A 25-year-old woman experienced three episodes of syncope over the course of 2 years. The attacks all occurred just after she had sat down, and two were accompanied by convulsions. She had no obvious prodromes and no personal or family history of cardiovascular disease.</AbstractText>Electrocardiography, chest radiogra... |
7,992 | The non-synonymous coding IKr-channel variant KCNH2-K897T is associated with atrial fibrillation: results from a systematic candidate gene-based analysis of KCNH2 (HERG). | Atrial fibrillation (AF) is the most frequent arrhythmia in humans. Rare familial forms exist. Recent evidence indicates a genetic susceptibility to common forms of AF. The alpha-subunit of the myocardial I(Kr)-channel, encoded by the KCNH2 gene, is crucial to ventricular and atrial repolarization. Patients with mutati... |
7,993 | [Acute inferior myocardial infarction masking the J wave syndrome. Based on four observations]. | The J wave syndrome is characterized by a prominent J wave accompanied by ST-segment elevation in the absence of structural heart disease. It includes the benign early repolarization syndrome, the highly arrhythmogenic Brugada syndrome and idiopathic ventricular fibrillation. Although acute coronary syndromes are one o... |
7,994 | [Out-of-hospital treatment and 1-year survival in patients with ST-elevation acute myocardial infarction. Results of the Spanish Out-of-Hospital Fibrinolysis Evaluation Project (PEFEX)]. | To investigate out-of-hospital treatment, including fibrinolysis, in patients with ST-elevation acute myocardial infarction and to determine the 1-year survival rate.</AbstractText>Prospective cohort study based on an ongoing out-of-hospital registry of patients with ST-elevation acute myocardial infarction who were tr... |
7,995 | Surgical methods to reverse left ventricular remodeling. | Heart transplantation remains the gold standard treatment for "end-stage" dilated cardiomyopathy. However, its epidemiologic impact on the heart failure problem continues to be small due to limited donor organ availability and contraindications. Therefore, several "conventional" surgical procedures have been developed ... |
7,996 | Inhibiting the renin-angiotensin system with ACE Inhibitors or ARBs after MI. | As part of the recommended modern post-myocardial infarction (MI) management, including reperfusion strategies, antiplatelet therapy, and beta-blockers, we may wonder whether the impact of early inhibition of the renin-angiotensin system (RAS) is as important as it was 20 years ago. This review demonstrates that signif... |
7,997 | Diagnosis and treatment of sleep apnea in heart disease. | One of the most common yet unidentified conditions in heart disease is sleep-disordered breathing (SDB). Although it is most prevalent in patients with heart failure, it has been epidemiologically and pathophysiologically linked to ischemic heart disease, hypertension, sudden cardiac death, atrial fibrillation, and str... |
7,998 | Risk stratification and prevention of sudden death in hypertrophic cardiomyopathy. | Sudden cardiac death is the most devastating manifestation of hypertrophic cardiomyopathy (HCM) and often occurs in young and previously asymptomatic patients. Therefore, risk stratification for sudden death has a major role in the management of HCM and has acquired even greater relevance since the implantable cardiove... |
7,999 | Ryanodine receptor: a novel therapeutic target in heart disease. | In excitable cells such as skeletal and cardiac myocytes excitation-contraction coupling is an important intermediate step between initiation of the action potential and induction of contraction. This process is predominantly controlled by Ca(2+) release from the sarcoplasmic reticulum via the ryanodine receptor. This ... |
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