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7,300 | Long-term safety and efficacy of right ventricular outflow tract pacing in patients with permanent pacemakers. | The aim of the present study was to investigate long-term safety and change in pacing parameters of right ventricular outflow tract (RVOT) pacing.</AbstractText>This prospectively designed controlled clinical study comprised patients in Group 1 (n=16) and Group 2 (n=16) who were paced in RVOT and right ventricular apex... |
7,301 | Azimilide reduces emergency department visits and hospitalizations in patients with an implantable cardioverter-defibrillator in a placebo-controlled clinical trial. | The goal of this study was to determine whether azimilide, as compared with placebo, will reduce the number of emergency department (ED) visits and hospitalizations caused by arrhythmias or cardiac events in patients with an implantable cardioverter-defibrillator (ICD).</AbstractText>Patients with an ICD may require ED... |
7,302 | Amiodarone induced pneumonitis and hyperthyroidism: case report. | Amiodarone is a highly effective antiarrhythmic agent used in life-threatening ventricular and supraventricular arrhythmias. Its long-term use may however lead to several adverse effects, including corneal deposits, liver and thyroid gland dysfunction, lung lesions, bone marrow injury, skin lesions, or neurological abn... |
7,303 | Mitral valve repair: beyond the French correction. | We analysed retrospectively patients who underwent mitral valve repair using techniques beyond the "French correction", as popularised by Carpentier.</AbstractText>From June 1997 to June 2006, 153 patients underwent mitral valve repair. Their mean age was 63.1 +/- 13.5 years (range 19-87). Mean Euroscore was 4.9 +/- 2.... |
7,304 | Ventricular arrhythmias and antioxidative medication: experimental study. | Reperfusion arrhythmias could be due to free radicals, while contraction excitation feedback is the cause of arrhythmias generated by blood pressure elevation (BPE). The aim of this study was to test the antiarrhythmic effects of an antioxidant (vitamin C [vit C], 1.5 g), an iron-binding agent (deferoxamine [Def], 1 g)... |
7,305 | [Occurrence of arrhythmias related to treatment of myocardial infarction]. | Percutaneous coronary catheter intervention (PCI) reduces mortality in ST-elevation myocardial infarction (STEMI) more than fibrinolysis. However, it remains uncertain whether PCI reduces the incidence of early post-infarction arrhythmias.</AbstractText>We compared the incidence of arrhythmias in two groups of consecut... |
7,306 | Peroxynitrite decreases arrhythmias induced by ischaemia reperfusion in anaesthetized dogs, without involving mitochondrial KATP channels. | Exogenous peroxynitrite from nanomolar to micromolar concentrations exerts cardioprotection. Here, we have assessed its effects on ischaemia- and reperfusion-induced ventricular arrhythmias in vivo and a possible role for mitochondrial K(ATP) channels in these effects, using the channel inhibitor 5-hydroxydecanoate (5-... |
7,307 | Endothelin-1 is not predictive of ventricular ectopy or ventricular fibrillation during acute myocardial ischemia. | Endothelin(ET)-1 (ET-1) increases after myocardial infarction and may have effects on myocardial function. ET-1 has also been shown to affect the action potential (AP) which may be arrhythmogenic and predispose to ventricular fibrillation (VF). The effects of ET-2 and ET-3 are uncertain. We hypothesized that the ETs in... |
7,308 | ECG scaling properties of cardiac arrhythmias using detrended fluctuation analysis. | We applied detrended fluctuation analysis to characterize at very short time scales during episodes of cardiac arrhythmias the raw electrocardiogram (ECG) waveform, aiming to get a global insight into its dynamical behaviour in patients who experienced sudden death. We found that in 15 recordings involving different ty... |
7,309 | Epicardial ultrasonic ablation of atrial fibrillation during concomitant cardiac surgery is a valid option in patients with ischemic heart disease. | Surgical therapy of atrial fibrillation concomitant to coronary bypass grafting using epicardial Ultrasound technology was assessed after a minimum 6-month follow-up.</AbstractText>A cohort of 98 consecutive patients with a mean age of 72+/-7.58 years and a primary diagnosis of ischemic heart disease had surgery for st... |
7,310 | [Automatic external defibrillator--mode of operation and clinical use]. | Every year about 100,000 persons die from sudden cardiac death (SCD) in Germany. Although many efforts have been undertaken, mortality remains high. Only 2 - 10% of patients with out-off hospital SCD can finally be discharged from hospital after resuscitation. Observational studies show that ventricular fibrillation an... |
7,311 | Chemical sympathetic denervation, suppression of myocardial transient outward potassium current, and ventricular fibrillation in the rat. | Sympathetic denervation is frequently observed in heart disease. To investigate the linkage of sympathetic denervation and cardiac arrhythmia, we developed a rat model of chemical sympathectomy by subcutaneous injections of 6-hydroxydopamine (6-OHDA). Cardiac sympathetic innervation was visualized by means of a glyoxyl... |
7,312 | Granulocyte colony-stimulating factor reduces mortality by suppressing ventricular arrhythmias in acute phase of myocardial infarction in rats. | Our aim was to evaluate the effects of granulocyte colony-stimulating factor (G-CSF) on early cardiac arrhythmias after myocardial infarction (MI) and the impact on survival. Male Wistar rats received repeated doses of 50 mug/kg G-CSF (MI-GCSF group) or vehicle (MI group) at 7, 3, and 1 days before surgery. MI was indu... |
7,313 | [Interventional cardiology]. | Interventional cardiology has dramatically developed since its introduction in 1977. Angioplasty represents the first choice for coronary reperfusion during acute myocardial infarction with thromboaspiration and stenting of the culprit lesion. In acute coronary syndroms and stable angina or silent ischemia despite opti... |
7,314 | Epicardial mapping of ventricular fibrillation over the posterior descending artery and left posterior papillary muscle of the swine heart. | Recent studies suggest that during ventricular fibrillation (VF) epicardial vessels may be a site of conduction block and the posterior papillary muscle (PPM) in the left ventricle (LV) may be the location of a "mother rotor." The goal of this study was to obtain evidence to support or refute these possibilities.</Abst... |
7,315 | Electrophysiologic and histopathologic findings of the ablation sites for ventricular fibrillation in a patient with ischemic cardiomyopathy. | We examined autopsy specimens from a patient with ischemic cardiomyopathy who underwent radiofrequency catheter ablation of ventricular fibrillation. There was site specific arrhythmogenesis of the trigger ventricular premature contractions (VPCs) and Purkinje potentials were recorded before the onset of the QRS. In po... |
7,316 | Early repolarization and sudden cardiac arrest: theme or variation on a theme? | The association between early repolarization patterns on electrocardiograms and risk of idiopathic ventricular fibrillation reported by Haïssaguerre et al. raises questions about the generally held concept that early repolarization is a benign electrocardiographic pattern. Although the association reported is stro... |
7,317 | Fragmented QRS as a marker of conduction abnormality and a predictor of prognosis of Brugada syndrome. | Conduction abnormalities serve as a substrate for ventricular fibrillation (VF) in patients with Brugada syndrome (BS). Signal-averaged electrograms can detect late potentials, but the significance of conduction abnormalities within the QRS complex is still unknown. The latter can present as multiple spikes within the ... |
7,318 | Drug induced shortening of the QT/QTc interval: an emerging safety issue warranting further modelling and evaluation in drug research and development? | A session dedicated to the issue of drug-induced QT and/or QTc interval (QT/QTc) shortening of the electrocardiogram (ECG) was held at the 2007 Safety Pharmacology Society (SPS) meeting in Edinburgh.</AbstractText>The session included a presentation on the results of a cross company survey on QT/QTc-shortening, a podiu... |
7,319 | Nifekalant and disopyramide in a patient with short QT syndrome: evaluation of pharmacological effects and electrophysiological properties. | We assessed several pharmacological effects on electrocardiogram parameters and effective refractory period (ERP) in a patient with a short QT syndrome (SQTS). Pharmacological challenge tests revealed that disopyramide and selective I(kr) blocker, nifekalant normalized QT interval, and ERP of the atrial and ventricular... |
7,320 | Atrial and ventricular arryhthmogenic potential in Turner Syndrome. | P-wave dispersion (Pd), corrected P-wave dispersion (Pdc), QT-wave dispersion (QTd), and corrected QT-wave dispersion (QTdc) parameters were not assessed in Turner Syndrome (TS) before. The aim of this study is to investigate the cardiac arrhythmogenic potential in patients with TS.</AbstractText>Thirty-one patients wi... |
7,321 | Atrial fibrillation is associated with decreased cardiac sympathetic response to isometric exercise in CHF in comparison to sinus rhythm. | The presence of atrial fibrillation (AF) in congestive heart failure (CHF) is accompanied by increased mortality, although the exact mechanism is unclear. In previous studies, we have demonstrated cardiac baroreceptor abnormalities in association with AF and CHF. In this study, we sought to examine the effect of cardia... |
7,322 | Steroid induced atrial fibrillation. | A 72-year-old female presented with an acute flaure of Crohn's disease and received intravenous methylprednisolone. The following morning ECG showed atrial fibrillation with a rapid ventricular response of 111 bts/min, which spontaneously resolved within 7 hours. The underlying arrhythmogenenic mechanism is unknown. |
7,323 | Vasopressin for the management of catecholamine-resistant anaphylactic shock. | Severe anaesthetic anaphylaxis is relatively uncommon. Oxygen, fluids and epinephrine are considered to be the mainstay for treatment of cardiovascular collapse and current guidelines for the management of anaphylaxis list only epinephrine as a vasopressor to use in the event of a cardiovascular collapse. Recently, evi... |
7,324 | Sildenafil citrate on the inducibility of ventricular fibrillation and upper limit of vulnerability in swine. | Sildenafil citrate at supratherapeutic levels has been reported to decrease defibrillation efficacy. However, its effects on ventricular fibrillation induction and the upper limit of vulnerability (ULV) have not been investigated. We tested the hypothesis that sildenafil citrate reduces the ventricular fibrillation thr... |
7,325 | Cardiocerebral resuscitation: a better approach to cardiac arrest. | To present a new approach to patients with cardiac arrest that improves neurologically normal survival. It is called cardiocerebral resuscitation (CCR), rather than cardiopulmonary resuscitation, as the major goal in cardiac arrest is to resuscitate the heart and the brain. CCR has three components: continuous chest co... |
7,326 | Off-pump coronary bypass surgery for high-risk patients: only in expert centers? | Off-pump coronary artery bypass (OPCAB) grafting has been increasingly adopted in an effort to prevent deleterious effects of cardiopulmonary bypass, including the associated inflammatory response, global myocardial ischemia and the risks of aortic manipulation. In many studies, the greatest benefit of OPCAB has been i... |
7,327 | [Tako-Tsubo syndrome after anaphylaxis caused by succinylcholine during general anaesthesia]. | The Tako-Tsubo syndrome (or transient left ventricular apical balloning) is a new clinical entity, very similar to acute myocardial infarction, but different by its excellent short-term prognosis. It has been reported after a physical or an emotional stress, and it is diagnosed by a coronary angiogram and a left ventri... |
7,328 | Surgical therapies for post-myocardial infarction patients. | Occasionally, high-risk patients in the post-myocardial infarction (MI) period require surgical intervention for stabilization and/or revascularization. In a meta-analysis involving 3,088 patients with ischemic heart disease, revascularization was associated with nearly an 80% reduction in the risk of death. Coronary a... |
7,329 | Intermittent hypoxia and sleep-disordered breathing: current concepts and perspectives. | There are three major types of sleep-disordered breathing (SDB) with respect to prevalence and health consequences, i.e. obstructive sleep apnoea syndrome (OSAS), Cheyne-Stokes respiration and central sleep apnoea (CSR-CSA) in chronic heart failure, and obesity hypoventilation syndrome (OHS). In all three conditions, h... |
7,330 | Minimal interruption of cardiopulmonary resuscitation for a single shock as mandated by automated external defibrillations does not compromise outcomes in a porcine model of cardiac arrest and resuscitation. | Current automated external defibrillations require interruptions in chest compressions to avoid artifacts during electrocardiographic analyses and to minimize the risk of accidental delivery of an electric shock to the rescuer. The earlier three-shock algorithm, with prolonged interruptions of chest compressions, compr... |
7,331 | Milrinone use is associated with postoperative atrial fibrillation after cardiac surgery. | Postoperative atrial fibrillation (AF), a frequent complication after cardiac surgery, causes morbidity and prolongs hospitalization. Inotropic drugs are commonly used perioperatively to support ventricular function. This study tested the hypothesis that the use of inotropic drugs is associated with postoperative AF.</... |
7,332 | Standardization of video-assisted cardiac surgery technique: initial experience. | Minimally invasive cardiac surgery has been performed in major worldwide centers, including procedure such as valves, coronary and congenital surgery.</AbstractText>To demonstrate our first works with noninvasive cardiac surgery by mean of the experience gained with general and thoracic surgery.</AbstractText>Whenever ... |
7,333 | Right ventricular dilatation predicts survival after mitral valve repair in patients with impaired left ventricular systolic function. | The prognostic value of the right ventricular parameters in patients with heart failure (HF) is well documented, but the data on patients undergoing mitral valve repair are lacking.</AbstractText>The association between pre-operative right ventricular dilatation and outcome was studied in 70 consecutive patients with H... |
7,334 | The effects of nifekalant hydrochloride on the QT dispersion after direct-current defibrillation. | Although nifekalant hydrochloride (NIFE) has been demonstrated to suppress ventricular tachyarrhythmia, especially electrical storm, the mechanism by which it does so is still unclear. We examined its effects on the spatial dispersion of repolarization (SDR) after implantable cardioverter-defibrillator (ICD) shock.</Ab... |
7,335 | Aortic stenosis: diagnosis and treatment. | Aortic stenosis is the most important cardiac valve disease in developed countries, affecting 3 percent of persons older than 65 years. Although the survival rate in asymptomatic patients with aortic stenosis is comparable to that in age- and sex-matched control patients, the average overall survival rate in symptomati... |
7,336 | Nerve sprouting suppresses myocardial I(to) and I(K1) channels and increases severity to ventricular fibrillation in rat. | Nerve sprouting in healed myocardial infarction has been associated with increased incidences of ventricular tachyarrhythmia and sudden cardiac death. However, the underlying electrophysiological mechanisms are unclear. To investigate the linkage between nerve sprouting and potassium channel function, we developed a ra... |
7,337 | Where do derived precordial leads fail? | A 12-lead electrocardiogram (ECG) reconstructed from a reduced subset of leads is desired in continued arrhythmia and ST monitoring for less tangled wires and increased patient comfort. However, the impact of reconstructed 12-lead lead ECG on clinical ECG diagnosis has not been studied thoroughly. This study compares t... |
7,338 | [Atrial fibrillation. Monitoring of rhythm versus monitoring of ventricular response]. | Atrial fibrillation is the most frequent supraventricular arrhythmia. The goals for the treatment of this arrhythmia are symptom control and reducing cardiovascular morbidity and mortality. In elderly patients with no symptoms we must indicate therapy based on rate control. On the other side, in young patients without ... |
7,339 | Ventricular arrhythmia onset during diagnostic coronary angiography with a 5F or 4F universal catheter. | Of 18,365 patients who underwent coronary angiography with a 4F or 5F universal catheter between April 2004 and May 2007, 24 (0.131%) experienced sustained ventricular tachycardia or ventricular fibrillation during the procedure. There was no significant difference in any clinical or angiographic characteristic between... |
7,340 | Management [corrected] of conversions to cardiopulmonary bypass in beating heart coronary surgery. | This study investigated outcomes in patients undergoing coronary artery bypass grafting (CABG) without cardiopulmonary bypass (CPB), who needed conversion to CPB. Between September, 1998 and September, 2003, 1000 CABG procedures were performed in a Cardiovascular Clinic, University Clinical Centre Tuzla. Multivessel CA... |
7,341 | Thyrotoxicosis-induced ventricular arrhythmias. | Cardiac arrhythmias associated with thyrotoxicosis tend to be supraventricular in nature with atrial fibrillation being the most common. Ventricular arrhythmias are rarely associated with thyrotoxicosis and are considered to be secondary to intrinsic cardiac disease.</AbstractText>We present three patients with thyroto... |
7,342 | Ventricular arrhythmia in children: diagnosis and management. | With increasing awareness of genetic abnormalities and the aging of patients with structural cardiac disease, particularly those who have had cardiac surgery, primary ventricular tachycardia is being recognized more frequently in children and adolescents and is becoming a larger management issue. The distinction of pri... |
7,343 | Optimal Programming of ICDs for Prevention of Appropriate and Inappropriate Shocks. | Expansion of indications for implantable cardioverter-defibrillators (ICDs) has led to a significant increase in the number of patients receiving ICDs and the number of lives saved because of ICD therapy. However, appropriate or inappropriate shocks are frequent and may result in a significant decrease in quality of li... |
7,344 | Cardiac arrest management: part 1. Understanding the role of Basic Life Support in the latest American Heart Association guidelines. | You've just finished renewing your CPR card at the firehouse, and now you're sitting in the day room with your classmates. One of them is frustrated that the guidelines keep changing. "First it's five compressions to one breath," he says. "Then it's 15 to two, and now 30 to two. And what about shocking first? They just... |
7,345 | Anticoagulant and/or antiplatelet treatment in patients with atrial fibrillation after percutaneous coronary intervention. A single-center experience. | Atrial fibrillation (AF) is the most common cardiac arrhythmia sustained and frequently occurs in patients with coronary heart disease. Thus, a large number of patients requiring percutaneous coronary intervention (PCI) also suffer from AF. An anticoagulant regimen has not been standardized for patients with AF after c... |
7,346 | Ventricular fibrillation time constant for swine. | The strength-duration curve for cardiac excitation can be modeled by a parallel resistor-capacitor circuit that has a time constant. Experiments on six pigs were performed by delivering current from the X26 Taser dart at a distance from the heart to cause ventricular fibrillation (VF). The X26 Taser is an electromuscul... |
7,347 | Regional variation in out-of-hospital cardiac arrest incidence and outcome. | The health and policy implications of regional variation in incidence and outcome of out-of-hospital cardiac arrest remain to be determined.</AbstractText>To evaluate whether cardiac arrest incidence and outcome differ across geographic regions.</AbstractText><AbstractText Label="DESIGN, SETTING, AND PATIENTS" NlmCateg... |
7,348 | Focal AF-ablation after pulmonary vein isolation in a patient with hypertrophic cardiomyopathy using cryothermal energy. | A 42-year-old man, with a history of hypertrophic cardiomyopathy (HCM), an electrocardiogram pattern of ventricular preexcitation typical for mutations in the PRKAG2 gene, and highly symptomatic paroxysmal drug-resistant atrial fibrillation (AF), underwent successful circumferential isolation of his pulmonary veins usi... |
7,349 | Risk factors for atrioventricular tachycardia degenerating to atrial flutter/fibrillation in the young with Wolff-Parkinson-White. | Atrioventricular reciprocating tachycardia (AVRT) is common in patients (pts) with Wolff-Parkinson-White (WPW) syndrome but atrial flutter/fibrillation (AF) with rapid ventricular response (RVR) is rare. Although AF occurs in 18% of adult WPW pts, its incidence in children is unknown. We sought to determine risk factor... |
7,350 | Hemodynamics and prognosis after primary cardiac resynchronization system implantation compared to "upgrade" procedures. | Left bundle brunch block (LBBB) and right ventricular stimulation (RVS) may be associated with asynchrony and heart failure. Differences between these two entities and their response to cardiac resynchronization therapy (CRT) are not well defined.</AbstractText>Patients receiving CRT from 1999 to 2006 were analyzed for... |
7,351 | Ventricular arrhythmias after left ventricular assist device implantation. | Left ventricular assist devices (LVADs) have been used as a bridge to cardiac transplantation and as destination therapy in patients with advanced heart failure. The period after LVAD support is associated with ventricular arrhythmias (VAs) despite ventricular unloading and such VAs can have a detrimental effect on sur... |
7,352 | Timing of life-threatening arrhythmias detected by implantable cardioverter-defibrillators in relation to changes in cosmophysical factors. | Studies have linked the natural history of many pathologies with environmental physical activity. This study investigated the relationship between the occurrence of ventricular tachycardia/fibrillation (VT/VF) recorded by implantable cardioverter defibrillators (ICD) and geomagnetic and cosmic ray (neutron) activity.</... |
7,353 | Ventricular fibrillation in a 5-year-old child on therapeutic dose of quinine dihydrochloride infusion for acute malaria. | Malaria is no doubt a disease of public health significance in the tropics. Plasmodium falciparum resistant to majority of the first-line antimalarial drugs now causes most of the infections treated in sub-Saharan Africa. Although there is increasing use of artemisinin-based combination therapy in many African nations,... |
7,354 | The place of hybrid therapies with drugs to supplement nonpharmacological therapies in atrial fibrillation. | Atrial fibrillation (AF) is one of the most common cardiac arrhythmias, and its prevalence continues to rise as the aged population increases. Comparative studies of rhythm control and rate control have been equivocal; however, the benefits of rhythm control may have been offset by the limitations of antiarrhythmic dru... |
7,355 | Cardiovascular effects of psychotropic drugs. | Cardiovascular disease is the leading cause of death in the general population and accounts for approximately 30% of all deaths; some of these are due to fatal arrhythmias, especially ventricular fibrillation. In a psychiatric population the prevalence of cardiovascular disease is higher than in the general population ... |
7,356 | Usefulness of echo-guided cardiac resynchronization pacing in patients undergoing "ablate and pace" therapy for permanent atrial fibrillation and effects of heart rate regularization and left ventricular resynchronization. | An acute comparative study of right ventricular (RV) pacing and echocardiographically guided cardiac resynchronization pacing (CRP) was performed in patients who underwent "ablate and pace" therapy for permanent atrial fibrillation. It was hypothesized that optimized CRP guided by tissue Doppler echocardiography would ... |
7,357 | Left atrial dyssynchrony assessed by strain imaging in predicting future development of atrial fibrillation in patients with heart failure. | The clinical and echocardiographic parameters associated with the risk of developing new onset atrial fibrillation (AF) in congestive heart failure (CHF) have not been studied comprehensively. We determined if dyssynchronous left atrial (LA) lengthening and contraction predicted future development of new onset AF in pa... |
7,358 | To replace or not to replace: a systematic approach to respond to device advisories. | The decision of whether and when to replace a device in response to an "advisory" letter requires careful consideration, because device replacement carries related risks and is influenced by the clinical characteristics of the patient.</AbstractText>The risk/benefit of device replacement depends on four parameters: exp... |
7,359 | Lambda-like ST segment elevation in acute myocardial infarction - a new risk marker for ventricular fibrillation? Three case reports. | Sudden cardiac death (SCD) is responsible for almost 50% of all cardiac deaths in the U.S. The most common underlying cause of SCD is coronary artery disease, especially acute myocardial infarction (AMI). There are no publications concerning the shape of ST segment elevation in AMI and the risk of ventricular fibrilati... |
7,360 | Rate-dependence of atrial tachycardia effects on atrial refractoriness and atrial fibrillation maintenance. | Although atrial-tachycardia remodelling is a significant atrial fibrillation (AF) promoting factor, little information is available about how atrial-tachycardia rate determines remodelling effects. This study assessed the effects of atrial tachypacing (ATP) over a range of clinically relevant rates on atrial electrophy... |
7,361 | Prognostic factors and predictors of in-hospital mortality of patients with heart failure with preserved left ventricular ejection fraction. | To date, in-hospital mortality predictors of patients with heart failure and depressed left ventricular ejection fraction are well known. Nevertheless, this is not the case of patients suffering from heart failure with preserved left ventricular ejection fraction. Our aim is to describe the incidence and predictors of ... |
7,362 | Brain natriuretic peptide as a surrogate marker for cardioembolic stroke with paroxysmal atrial fibrillation. | Cardioembolic stroke generally results in severer disability, since it typically has a larger ischemic area than the other types of ischemic stroke. However, it is difficult to differentiate cardioembolic from noncardioembolic stroke (atherothrombotic and lacunar stroke), whenever ischemic stroke patients have sinus rh... |
7,363 | Lidocaine converts acute vagally associated atrial fibrillation to sinus rhythm in German Shepherd dogs with inherited arrhythmias. | Lidocaine is most frequently used to treat ventricular arrhythmias. However, lidocaine may have an antiarrhythmic effect for certain supraventricular arrhythmias.</AbstractText>We hypothesized that lidocaine would be effective in converting experimentally induced atrial fibrillation (AF) to sinus rhythm and that a decr... |
7,364 | Should amiodarone or lidocaine be given to patients who arrest after cardiac surgery and fail to cardiovert from ventricular fibrillation? | A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was whether the administration of amiodarone or lidocaine in patients with refractory VT/VF after cardiac surgery results in successful cardioversion. Altogether more than 434 papers were found using the repo... |
7,365 | The role of the renin angiotensin system blocking in the management of atrial fibrillation. | The objective of the study was to review the current available clinical evidence for the role of renin-angiotensin system (RAS) blockade in the treatment of atrial fibrillation (AF).</AbstractText>We conducted a Pubmed and Medline literature search (January 1980 through May 2007) to identify all clinical trials publish... |
7,366 | GIANT Flutter Waves in ECG Lead V1: a Marker of Pulmonary Hypertension. | Atrial flutter (AFl) may exist with or without underlying structural heart disease. Typical AFl presents as a "sawtooth" pattern on the ECG - with inverted flutter (F) waves in the inferior leads and upright F waves in V1. This morphology offers no direct clues as to the underlying cardiac disorder, if any. Occasionall... |
7,367 | Survival after in-hospital cardiopulmonary resuscitation. | The use of postarrest variables to predict survival after discharge following in-hospital cardiopulmonary resuscitation has not been definitive. This study evaluates whether the duration of cardiopulmonary resuscitation (CPR) and other variables affect discharge rates and survival rates after discharge.</AbstractText>P... |
7,368 | Programmed inappropriate ICD ventricular defibrillation for cardioversion of persistent atrial fibrillation. | In this report we briefly describe a patient with a dual chamber implantable cardioverter defibrillator in the context of severe ischemic cardiomyopathy who developed persistent atrial fibrillation. After appropriate anticoagulation and under mild sedation the patient was successfully cardioverted to sinus rhythm after... |
7,369 | Update on cardiac arrhythmias in the ICU. | To explore recent findings on the treatment and outcome of cardiac arrhythmias and how they affect ICU activities.</AbstractText>The rate vs. rhythm control debate for the treatment of chronic atrial fibrillation continues. It is still unclear whether the postcardiac surgery inflammatory response contributes to the dev... |
7,370 | Connexin40 messenger ribonucleic acid is positively regulated by thyroid hormone (TH) acting in cardiac atria via the TH receptor. | Thyroid hormone (TH) regulates many cardiac genes via nuclear thyroid receptors, and hyperthyroidism is frequently associated with atrial fibrillation. Electrical activity propagation in myocardium depends on the transfer of current at gap junctions, and connexins (Cxs) 40 and 43 are the predominant junction proteins. ... |
7,371 | Partial pressure of end-tidal carbon dioxide successful predicts cardiopulmonary resuscitation in the field: a prospective observational study. | Prognosis in patients suffering out-of-hospital cardiac arrest is poor. Higher survival rates have been observed only in patients with ventricular fibrillation who were fortunate enough to have basic and advanced life support initiated soon after cardiac arrest. An ability to predict cardiac arrest outcomes would be us... |
7,372 | The proinflammatory cytokine response following resuscitation in the swine model depends on the method of ventricular fibrillation induction. | A systemic inflammatory response has been reported following resuscitation from cardiac arrest. The purpose of this study was to compare the magnitude of the tumor necrosis factor-alpha (TNF-alpha) response in two different swine models of ventricular fibrillation (VF) arrest.</AbstractText>This was a randomized compar... |
7,373 | Influence of intracoronary shunt on myocardial damage: a prospective randomized study. | We aimed to evaluate whether surgical intracoronary shunt protects myocardium in patients with moderate left ventricular dysfunction (MLVD).</AbstractText>Thirty-nine patients consisted the shunt group and 43 patients consisted the shuntless group. Troponin I, CK, and CK-MB were measured preoperatively, and at 6 and 24... |
7,374 | Ischaemic preconditioning during cardiac surgery: systematic review and meta-analysis of perioperative outcomes in randomised clinical trials. | Numerous small trials have been conducted to confirm the existence of the ischaemic preconditioning (IP) mechanism in the human heart and to clarify whether it can be induced in a clinical situation. The effect on clinical end-points remains unclear. Most of the available trials reported some clinical outcomes. We perf... |
7,375 | The hERG channel and risk of drug-acquired cardiac arrhythmia: an overview. | This review summarizes current knowledge of the cardiac rapidly activating delayed rectifier potassium current (I(Kr)), and its connection to drug-acquired QT prolongation and the associated risk of ventricular arrhythmia and fibrillation. The molecular characterization of hERG as the structural correlate of I(Kr) and ... |
7,376 | Cardiac contractility modulation in non-responders to cardiac resynchronization therapy. | Cardiac resynchronization therapy (CRT) has become a standard therapy in cases of heart failure and asynchrony. Unfortunately, 20-30% of patients were non-responsive (NR) to CRT. In this report we used cardiac contractility modulation (CCM) as an adjunctive measure in NR patients.</AbstractText>Sixteen NR patients, mea... |
7,377 | Esophageal cancer presenting with atrial fibrillation: a case report. | Atrial fibrillation was previously reported in patients with esophageal cancer as a complication of total esophagectomy or photodynamic therapy. Here, we propose that atrial fibrillation may also be caused by external compression of the left atrium by esophageal cancer.</AbstractText>We present a 58-year-old man who de... |
7,378 | Effect of bradyarrhythmia on the plasma levels of N-terminal pro-brain natriuretic peptide. | To investigate the effect of bradyarrhythmia on the plasma levels of NT-proBNP, patients without defined ventricular diseases were enrolled in this study: group A, 42 patients without arrhythmia; group B, 43 patients with sick sinus syndrome; group C, 22 patients with II degrees atrioventricular block (AVB); group D, 3... |
7,379 | Reentry in an accessory atrioventricular pathway as a trigger for atrial fibrillation initiation in manifest Wolff-Parkinson-White syndrome: a matter of reflection? | Patients with an accessory pathway (AP) have an increased propensity to develop atrial fibrillation (AF), but the mechanism is unknown.</AbstractText>The purpose of this study was to identify crucial risk factors and to test the hypothesis that reflection and/or microreentry of atrial impulses propagating into the AP t... |
7,380 | Prognostic value of pulse-wave tissue Doppler parameters in patients with systolic heart failure. | The aim was to study the prognostic value of left ventricular (LV) function using pulse-wave tissue Doppler imaging (TDI) in an ordinary population with heart failure (HF). One hundred fifty-six patients hospitalized for HF and LV ejection fraction < or =40% were examined using conventional echocardiography and puls... |
7,381 | Preoperative and postoperative mitral valve prolapse and regurgitation in adult patients with secundum atrial septal defects. | Little attention is given to development of mitral regurgitation (MR) in adults with atrial septal defect (ASD). The aim of the study was to determine the associated factors of MR in ASD adults before surgical repair and the fate of moderate to severe MR after surgery.</AbstractText>We examined 71 consecutive patients ... |
7,382 | Prognostic importance of defibrillator shocks in patients with heart failure. | Patients with heart failure who receive an implantable cardioverter-defibrillator (ICD) for primary prevention (i.e., prevention of a first life-threatening arrhythmic event) may later receive therapeutic shocks from the ICD. Information about long-term prognosis after ICD therapy in such patients is limited.</Abstract... |
7,383 | Predictive factors of sustained sinus rhythm and recurrent atrial fibrillation after a radiofrequency modified Maze procedure. | Preoperative atrial fibrillation (AF) in patients scheduled for elective open-heart surgery is a well-known phenomenon. The cut and sew Maze procedure or variant Maze procedures abolish AF in 45-95% of patients during short- to intermediate-term follow-up. We determined preoperative and postoperative factors predictive... |
7,384 | [Arrhythmias during pregnancy]. | Cardiovascular emergencies are rare during pregnancy with an incidence of 0,2-4,0%. Emergencies include arrhythmias, acute coronary syndrome, peripartum cardiomyopathy and hypertensive disorders. Electrical DC-cardioversion with 50-100 Joules is indicated in the acute treatment of arrhythmias in all patients in an unst... |
7,385 | Experimental study of a novel method of cardiopulmonary resuscitation using a combination of percutaneous cardiopulmonary support and liposome-encapsulated hemoglobin (TRM645). | Percutaneous cardiopulmonary support (PCPS) has been applied for cardiopulmonary arrest (CPA). We have developed a novel method of cardiopulmonary resuscitation using PCPS combined with liposome-encapsulated hemoglobin (TRM645) to improve oxygen delivery to vital organs. Ventricular fibrillation was electrically induce... |
7,386 | Indeterminacy of spatiotemporal cardiac alternans. | Cardiac alternans, a beat-to-beat alternation in action potential duration (at the cellular level) or in electrocardiogram morphology (at the whole heart level), is a marker of ventricular fibrillation, a fatal heart rhythm that kills hundreds of thousands of people in the United States each year. Investigating cardiac... |
7,387 | Acute effects of angiotensin II receptor blocker on ventricular repolarization alternans in chronic heart failure. | Repolarization alternans, which can be detected clinically as microvolt-level T-wave alternans (TWA), is considered an important mechanism underlying the initiation of ventricular tachycardia/ventricular fibrillation (VT/VF) linked to sudden cardiac death (SCD). Recently, the rennin-angiotensin system (RAS) inhibitors ... |
7,388 | Risk stratification of patients with prior myocardial infarction and advanced left ventricular dysfunction by gated myocardial perfusion SPECT imaging. | The Multicenter Automatic Defibrillator Implantation Trial II (MADIT-II) has shown that the prophylactic implantable cardiac defibrillator improves the survival rate of patients with prior myocardial infarction and advanced left ventricular (LV) dysfunction. However, a more accurate noninvasive predictor should be foun... |
7,389 | Extended cervical mediastinoscopy in the staging of bronchogenic carcinoma of the left lung. | To evaluate the technical feasibility and the sensitivity, specificity and accuracy of extended cervical mediastinoscopy (ECM) in the staging of bronchogenic carcinoma (BC) of the left lung.</AbstractText>From 1998 to 2003, 89 patients underwent routine ECM for staging of BC of the left lung. In 2004, positron emission... |
7,390 | Effects of sympathetic nerve stimulation on ischemia-induced ventricular arrhythmias by modulating connexin43 in rats. | Increased cardiac sympathetic nerve activity is thought to contribute to ventricular tachyarrhythmias during acute myocardial ischemia (MI). However, the mechanism is not completely understood. This study investigated the effects of sympathetic nerve stimulation (SNS) on ventricular tachyarrhythmias and connexin43 (Cx4... |
7,391 | Dronedarone for the control of ventricular rate in permanent atrial fibrillation: the Efficacy and safety of dRonedArone for the cOntrol of ventricular rate during atrial fibrillation (ERATO) study. | Dronedarone is a new multichannel blocker for atrial fibrillation (AF) previously demonstrated to have both rhythm and rate control properties in paroxysmal and persistent AF. The Efficacy and safety of dRonedArone for The cOntrol of ventricular rate during atrial fibrillation (ERATO) trial assessed the efficacy of dro... |
7,392 | Atrial fibrillation in recipients of cardiac resynchronization therapy device: 1-year results of the randomized MASCOT trial. | Atrial fibrillation (AF) is associated with increased morbidity and mortality in patients suffering from heart failure (HF). Patients in New York Heart Association HF classes III or IV, with systolic dysfunction and a wide QRS, are candidates for cardiac resynchronization therapy (CRT), and might benefit from atrial ov... |
7,393 | Predictors of improved quality of life 1 year after pacemaker implantation. | Patient's health-related quality of life (HRQoL) of pacemaker (PM) patients has increasingly become an important issue of health care evaluation. Currently, knowledge of pacing performance and technology is more or less outlined. However, determinants of poor or good HRQoL of paced patients require further elucidation.... |
7,394 | The MINERVA study design and rationale: a controlled randomized trial to assess the clinical benefit of minimizing ventricular pacing in pacemaker patients with atrial tachyarrhythmias. | Dual-chamber (DDD) pacing has generally been regarded as "physiologic pacing" and therefore expected to be superior to ventricular pacing. Major randomized trials have so far failed to demonstrate significant reductions in the incidences of mortality, stroke, and heart failure. It has been shown that unnecessary ventri... |
7,395 | Prognostic value of left ventricular myocardial performance index in patients undergoing coronary artery bypass graft surgery. | Left ventricular myocardial performance index is a Doppler-derived parameter of nongeometrical ventricular function that measures both systolic and diastolic function of the left ventricle. The objective of this study was to compare prognostic value of left ventricular myocardial performance index with global left vent... |
7,396 | Post-operative atrial fibrillation management by selective epicardial vagal fat pad stimulation. | Post-operative atrial fibrillation (POAF) is a common complication after cardiac surgery and often leads to poorly tolerated fast ventricular rates. Negative dromotropic drugs are not always effective and may not be well tolerated in heart failure patients. Aim of this study is to verify if high-frequency stimulation o... |
7,397 | The future of implantable defibrillator and cardiac resynchronization therapy trials. | Implantable cardioverter defibrillator (ICD) trials were initially limited to survivors of sudden death. The focus of defibrillator trials in the last decade has been in prophylactic implantation of the device in high risk populations for the prevention of sudden cardiac death. It is the contention in this review that ... |
7,398 | Dipyridamole therapy improves long-term survival after complete revascularization in patients with impaired cardiac function: a propensity analysis. | Although dipyridamole is no longer used as a mainstream medication for coronary artery disease because of the coronary steal phenomenon, recent studies have shown that the elevation of serum adenosine levels caused by dipyridamole improves cardiac function in heart failure patients. In the present study it was investig... |
7,399 | Off-pump versus on-pump--intermittent aortic cross clamping--myocardial revascularisation: single center expirience. | The aim of this randomised, prospective study was to evaluate hospital mortality and morbidity after myocardial revascularisation, comparing on-pump coronary artery bypass graft (CABG) myocardial revascularisation versus off-pump coronary artery bypass graft (OPCAB) myocardial revascularisation in population with multi... |
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