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6,900 | A simplified clinical electrocardiogram score for the prediction of cardiovascular mortality. | Electrocardiogram (ECG) scores have been demonstrated to predict CV mortality but they are rarely utilized clinically.</AbstractText>Develop a simple score consisting of adding classical ECG abnormalities to make the ECG a more convenient prognostic tool.</AbstractText>Resting ECGs of 29,320 outpatient male veterans fr... |
6,901 | Effects of interventional lung assist on haemodynamics and gas exchange in cardiopulmonary resuscitation: a prospective experimental study on animals with acute respiratory distress syndrome. | Interventional lung assist (ILA), based on the use of a pumpless extracorporeal membrane oxygenator, facilitates carbon dioxide (CO2) elimination in acute respiratory distress syndrome (ARDS). It is unclear whether an ILA system should be clamped during cardiopulmonary resuscitation (CPR) in patients with ARDS or not. ... |
6,902 | Frequency analysis of atrial electrograms identifies conduction pathways from the left to the right atrium during atrial fibrillation-studies in two canine models. | Studies of atrial fibrillation (AF) have demonstrated that a stable rhythm of very short cycle length in the left atrium (LA) can cause fibrillatory conduction in the rest of the atria. We tested the hypothesis that fast Fourier transform (FFT) analysis of atrial electrograms (AEGs) during this AF will rapidly and reli... |
6,903 | Liver transplantation in a patient with propionic acidemia requiring extra corporeal membrane oxygenation during severe metabolic decompensation. | LDLT is an effective treatment modality in patients with congenial metabolic liver disease. PA is a rare autosomal recessive disorder caused by deficiency in propionyl-CoA carboxylase. The present study demonstrates a two-yr-old girl with PA who was admitted for metabolic decompensation and immediately treated with CHD... |
6,904 | Magnesium sulfate versus placebo for paroxysmal atrial fibrillation: a randomized clinical trial. | The objective was to investigate the efficacy of magnesium sulfate (MgSO4) in decreasing the ventricular rate in emergency department (ED) patients presenting with new-onset, rapid atrial fibrillation (AF).</AbstractText>A double-blinded, placebo-controlled randomized clinical trial was conducted in an adult university... |
6,905 | [Tricuspid annuloplasty, pulmonary valve replacement, ventricular septal defect (VSD) patch closure, and right-sided maze procedure 23-years after corrective repair of tetralogy of Fallot]. | Postoperative pulmonary valve regurgitation, stenosis of the right ventricular outflow tract, conduit failure, ventricular septal patch leak, secondary tricuspid valve regurgitation, and various arrhythmias are the major complications that develop after surgical repair of tetralogy of Fallot in adults. A 27-year-old ma... |
6,906 | MinK-dependent internalization of the IKs potassium channel. | KCNQ1-MinK potassium channel complexes (4alpha:2beta stoichiometry) generate IKs, the slowly activating human cardiac ventricular repolarization current. The MinK ancillary subunit slows KCNQ1 activation, eliminates its inactivation, and increases its unitary conductance. However, KCNQ1 transcripts outnumber MinK trans... |
6,907 | Retrograde flush following warm ischemia in the non-heart-beating donor results in superior graft performance at reperfusion. | The use of non-heart-beating donors (NHBD) has been propagated as an alternative to overcome the scarcity of pulmonary grafts. The presence of postmortem thrombi, however, is a concern for the development of primary graft dysfunction. In this isolated lung reperfusion study, we looked at the need and the best route of ... |
6,908 | Development of the probability of return of spontaneous circulation in intervals without chest compressions during out-of-hospital cardiac arrest: an observational study. | One of the factors that limits survival from out-of-hospital cardiac arrest is the interruption of chest compressions. During ventricular fibrillation and tachycardia the electrocardiogram reflects the probability of return of spontaneous circulation associated with defibrillation. We have used this in the current stud... |
6,909 | Waivers for cardiovascular diseases in military aircrew: differences between Japanese and U.S. protocols. | Cardiovascular diseases can cause sudden incapacitation in aircrew. Cardiological diagnosis and therapy have changed a great deal in recent decades, as with coronary revascularization, including percutaneous coronary intervention and coronary artery bypass grafting for coronary artery disease, and electrophysiological ... |
6,910 | Pharmacotherapy for atrial arrhythmias: present and future. | Atrial fibrillation (AF) is the most commonly encountered arrhythmia in clinical practice. It is associated with significant morbidity, including palpitations, exercise intolerance, congestive heart failure, and increased risk of embolic stroke. Mortality is increased twofold in patients with AF. Management of AF with ... |
6,911 | The renin-angiotensin-aldosterone system (RAAS) and cardiac arrhythmias. | The role of the renin-angiotensin-aldosterone system (RAAS) in many cardiovascular disorders, including hypertension, cardiac hypertrophy, and atherosclerosis, is well established, whereas its relationship with cardiac arrhythmias is a new area of investigation. Atrial fibrillation and malignant ventricular tachyarrhyt... |
6,912 | Cellular bases for human atrial fibrillation. | Atrial fibrillation (AF) causes substantial morbidity and mortality. It may be triggered and sustained by either reentrant or nonreentrant electrical activity. Human atrial cellular refractory period is shortened in chronic AF, likely aiding reentry. The ionic and molecular mechanisms are not fully understood and may i... |
6,913 | Effect of fish oil on ventricular tachyarrhythmia in three studies in patients with implantable cardioverter defibrillators. | To determine the effects of omega-3 polyunsaturated fatty acids (omega-3 PUFAs) from fish on the incidence of recurrent ventricular arrhythmia in implantable cardioverter defibrillator (ICD) patients by combining results from published trials.</AbstractText>We searched in the Medline, EMBASE, and Cochrane databases and... |
6,914 | [Role of permanent pacing in the prevention and treatment of atrial fibrillation]. | Atrial fibrillation onset is enhanced by the presence of sinus bradycardia and sinus pauses. Cardiac pacing, by avoiding them, may prevent tachyarrhythmias. The atrial-based modes of pacing (AAI or DDD) demonstrated to be superior to ventricular pacing mode (VVI) in terms of reduction of atrial fibrillation burden and ... |
6,915 | [Integrated coronary artery bypass strategy prevents urgent pump conversion during off-pump coronary artery bypass grafting]. | Urgent pump conversion during off-pump coronary artery bypass (OPCAB) results in high morbidity and mortality. We retrospectively evaluated if the peri-operative integrated strategy prevents this lethal event in our 400 consecutive OPCAB operations. The patients with preoperative cardiogenic shock and/or ventricular ar... |
6,916 | Acute bioprosthetic thrombosis immediately after aortic valve replacement. | We present the case of a 72-year-old woman referred for dyspnea and vertigo when admitted to the hospital with a diagnosis of aortic stenosis. She had hypertension with previous deep venous thrombosis with no known hypercoagulable diathesis. She underwent aortic valve replacement with a Carpentier-Magna bioprosthesis w... |
6,917 | Comparison of arterial blood gases of laryngeal mask airway and bag-valve-mask ventilation in out-of-hospital cardiac arrests. | Focusing on the efficacy of successful ventilation during cardiopulmonary resuscitation (CPR) with alternative airways, previous reports investigated various parameters such as success rate, tidal volume, incidence of regurgitation, etc. However, there are few investigations of arterial blood gases (ABG) during CPR wit... |
6,918 | Assessment of left atrial appendage function with transthoracic tissue Doppler echocardiography. | A transthoracic echocardiographic (TTE) parameter that would stratify atrial fibrillation (AF) risk would be useful. Tissue Doppler imaging can quantify left atrial appendage contraction velocity (LAA A(M)).</AbstractText>We studied 141 patients referred for transoesophageal echocardiogram (TEE); 48 were in AF. We obta... |
6,919 | Risk stratification of the patients with Brugada type electrocardiogram: a community-based prospective study. | Risk stratification of patients with Brugada electrocardiogram (ECG) is being strongly debated. Conflicting results have been suggested from international registries, which enrolled non-consecutive cases, studied with different programmed electrical stimulation (PES) protocols. The aim of this study was to prospectivel... |
6,920 | Emergency surgical treatment of advanced endomyocardial fibrosis in Mozambique. | An 11-year-old girl presented to a specialist cardiac facility in Mozambique. She had severe heart failure and massive cardiac enlargement, herniation of the heart into the epigastrium, atrial fibrillation, signs of severe pulmonary hypertension and a low cardiac output.</AbstractText>Chest radiography, echocardiograph... |
6,921 | Cardiovascular and cerebrovascular comorbidities of hypokalemic and normokalemic primary aldosteronism: results of the German Conn's Registry. | Primary aldosteronism (PA) is associated with vascular end-organ damage.</AbstractText>Our objective was to evaluate differences regarding comorbidities between the hypokalemic and normokalemic form of PA.</AbstractText>This was a retrospective cross-sectional study collected from six German centers (German Conn's regi... |
6,922 | Atrial fibrillation: pathogenesis, medical-surgical management and dental implications. | Atrial fibrillation (AF) is a cardiac rhythm disturbance arising from disorganized electrical activity in the atria, and it is accompanied by an irregular and often rapid ventricular response. It is the most common clinically significant dysrhythmia in the general and older population.</AbstractText>The authors conduct... |
6,923 | Isolated focus of ventricular fibrillation. | Mechanisms underlying the initiation of ventricular tachycardia have been described as either rapidly firing focus initiated by triggered activity or automaticity, or a reentrant wavefront initiated by a premature ventricular depolarization. Ventricular fibrillation can occur after ventricular tachycardia; however, unc... |
6,924 | Heart failure enhances susceptibility to arrhythmogenic cardiac alternans. | Although heart failure (HF) is closely associated with susceptibility to sudden cardiac death (SCD), the mechanisms linking contractile dysfunction to cardiac electrical instability are poorly understood. Cardiac alternans has also been closely associated with SCD, and has been linked to a mechanism for amplifying elec... |
6,925 | Gender differences and risk of ventricular tachycardia or ventricular fibrillation. | Healthy women have longer QT intervals and more drug-induced proarrhythmia compared to men, yet those given implantable cardioverter-difibrillators (ICDs) for ischemic cardiomyopathy have fewer episodes of ventricular tachycardia/ventricular fibrillation (VT/VF) than men. The role of repolarization duration and stabili... |
6,926 | Atrial fibrillation and heart failure. | Atrial fibrillation (AF) is the most common arrhythmia in congestive heart failure (HF) and indicates a worse prognosis. AF increases HF symptoms and increases in prevalence with increasing New York Heart Association class. AF also interferes with the ideal management of HF. Across all HF etiologies, AF may be a marker... |
6,927 | A congenital form of junctional ectopic tachycardia. | Accessory pathways have been described as well as their Ecg identification criteria also in pediatric population. Radiofrequency ablation is a curative treatment but its application has been more limited in the paediatric population. The congenital form of junctional ectopic tachycardia was firstly described by Coumel ... |
6,928 | Effect of timing and duration of a single chest compression pause on short-term survival following prolonged ventricular fibrillation. | Pauses during chest compressions are thought to have a detrimental effect on resuscitation outcome. The Guidelines 2005 have recently eliminated the post-defibrillation pause. Previous animal studies have shown that multiple pauses of increasing duration decrease resuscitation success. We investigated the effect of var... |
6,929 | Clinical and genetic analysis of long QT syndrome in children from six families in Saudi Arabia: are they different? | Congenital long QT syndrome (LQTS) is an inherited cardiac arrhythmia disorder characterized by prolongation of the QT interval; patients are predisposed to ventricular tachyarrhythmias and fibrillation leading to recurrent syncope or sudden cardiac death. We performed clinical and genetic studies in six Saudi Arabian ... |
6,930 | Atrial arrhythmogenesis in wild-type and Scn5a+/delta murine hearts modelling LQT3 syndrome. | Long QT(3) (LQT3) syndrome is associated with abnormal repolarisation kinetics, prolonged action potential durations (APD) and QT intervals and may lead to life-threatening ventricular arrhythmias. However, there have been few physiological studies of its effects on atrial electrophysiology. Programmed electrical stimu... |
6,931 | Management of atrial fibrillation in the elderly. | Atrial fibrillation (AF) is associated with a higher incidence of mortality, stroke, and coronary events than is sinus rhythm. AF with a rapid ventricular rate may cause a tachycardia-related cardiomyopathy. Immediate direct-current (DC) cardioversion should be performed in patients with AF and acute myocardial infarct... |
6,932 | Provocation of silence. | We describe the development of a Brugada ECG together with sinus- and ventricular arrest after intravenous flecainide for atrial fibrillation in a patient in whom eventually a SCN5a mutation was identified. Unrecognized SCN5A mutations could underlie class IC-induced sinus arrest and conduction defects in some patients... |
6,933 | Presence Of Left Atrial Appendage Thrombus In Patients Presenting For Left Atrial Ablation Of Atrial Fibrillation Despite Pre-Operative Anticoagulation. | <b>Background:</b> One of the recognised complications of left atrial ablation for atrial fibrillation (AF) is stroke. Left atrial (LA) thrombus, which may be dislodged by catheter manipulation, is an absolute contraindication to ablation. It is unclear whether imaging of the left atrial appendage (LAA) by transesophag... |
6,934 | Atrial Fibrillation And Coronary Heart Disease:Fatal Attraction. | In this manuscript, the profile and clinical management of hypertensive patients with chronic ischemic heart disease and atrial fibrillation (AF) is examined and whether high heart rate is associated with a different profile is determined. CINHTIA was a cross-sectional and multicenter survey aimed to define the clinica... |
6,935 | QT Prolongation Following Ectopic Beats: Initial Data Regarding The Upper Limit Of Normal With Possible Implications For Antiarrhythmic Therapy And Concealed (Unexpressed) Long QT. | Background:</b> Ectopic beats are frequently associated with morphologic repolarization alterations of ensuing sinus beats. Less is known about repolarization duration alterations of post-ectopic sinus beats. In one patient who developed long QT and torsades de pointes upon exposure to a class III antiarrhythmic drug, ... |
6,936 | Hepatotoxicity after intravenous amiodarone. | Amiodarone is a class III antiarrhythmic agent with a long half-life which is used to control atrial and ventricular arrhythmias, including atrial flutter and fibrillation. We describe here the case of an elderly woman (77 years of age) who was hospitalized for acute atrial fibrillation, abdominal pain, and dyspnea. In... |
6,937 | Spontaneous and simultaneous multivessel coronary spasm causing multisite myocardial infarction, cardiogenic shock, atrioventricular block, and ventricular fibrillation. | A 57-year-old Taiwanese man with a past history of variant angina developed simultaneous anterior and inferior myocardial infarction, atrioventricular block, cardiogenic shock, and eventually ventricular fibrillation. Left coronary angiography revealed simultaneous occlusion of the left anterior descending and the left... |
6,938 | Tricuspid regurgitation in mitral valve disease incidence, prognostic implications, mechanism, and management. | Tricuspid regurgitation (TR) in patients with mitral valve (MV) disease is associated with poor outcome and predicts poor survival, heart failure, and reduced functional capacity. It is common if left untreated after MV replacement mainly in rheumatic patients, but it is also common in patients with ischemic mitral reg... |
6,939 | Cardiac surgery in patients with haemophilia. | Today the populations of haemophilia patients in many countries have a higher life expectancy than previously known, and age-related disorders such as arterial disease are expected to become more prevalent, calling for surgical intervention. Cardiac surgery constitutes a major haemostatic challenge because of sternotom... |
6,940 | Relationship of reverse anatomical remodeling and ventricular arrhythmias after cardiac resynchronization. | Cardiac resynchronization (CRT) affects reverse anatomical remodeling in patients with heart failure. CRT has also been associated with fewer ventricular arrhythmias and reduced sudden death in some clinical trials, but the predictors and mechanism of the antiarrhythmic actions of CRT have not been well defined. The pu... |
6,941 | A comparison of chronaxies for ventricular fibrillation induction, defibrillation, and cardiac stimulation: unexpected findings and their implications. | A low-energy (<or= 4 J) cardioversion shock (LEC) either terminates reentrant ventricular tachycardia (VT) or accelerates it to ventricular fibrillation (VF). Optimization of the duration and amplitude of LEC shocks could improve the success rate of VT termination without VF induction.</AbstractText>In order to lear... |
6,942 | Toxicity in Doberman Pinchers with ventricular arrhythmias treated with amiodarone (1996-2005). | Asymptomatic Doberman Pinschers with dilated cardiomyopathy (DCM) often die suddenly owing to ventricular tachycardia that degenerates into ventricular fibrillation. A safe and effective antiarrhythmic drug treatment is needed. This will require a large, well-controlled, prospective study.</AbstractText>Amiodarone toxi... |
6,943 | [Development of three-dimensional analysis of current density distribution by 64-ch magentocardiography and clinical application]. | Magnetocardiography (MCG) using a SQUID sensor is characterized by three dimensional cardiac electrical phenomena from magnetic fields, because it is hard to be affected by organ constitution of lungs and torso configuration. We have developed three-dimensional (3D) electric current density distribution analysis by a s... |
6,944 | Continuous improvements in "chain of survival" increased survival after out-of-hospital cardiac arrests: a large-scale population-based study. | The impact of ongoing efforts to improve the "chain of survival" for out-of-hospital cardiac arrest (OHCA) is unclear. The objective of this study was to evaluate the incremental effect of changes in prehospital emergency care on survival after OHCA.</AbstractText>This prospective, population-based observational study ... |
6,945 | Atrial fibrillation associated with chocolate intake abuse and chronic salbutamol inhalation abuse. | The use of substances as the substrate for atrial fibrillation is not frequently recognized. Chocolate is derived from the roasted seeds of the plant theobroma cacao and its components are the methylxanthine alkaloids theobromine and caffeine. Caffeine is a methylxanthine whose primary biological effect is the competit... |
6,946 | The effects of trimetazidine on p-wave duration and dispersion in heart failure patients. | P-wave duration and dispersion (PWD) have been shown to be noninvasive predictors for development of atrial fibrillation. Thus, it may be possible to attenuate atrial fibrillation risk through normalization of P-wave duration and dispersion. Trimetazidine, a metabolic modulator, has been reported to improve cardiac fun... |
6,947 | New or aggravated heart failure during long-term right ventricular pacing after AV junctional catheter ablation. | Atrioventricular junctional ablation (AVJA) improves symptoms and quality of life in patients with pharmacologically resistant atrial fibrillation (AF). However, long-term right ventricular stimulation has also been reported to lead to deterioration of the left ventricular function. We retrospectively analyzed the inci... |
6,948 | Organization of ventricular fibrillation in the human heart: experiments and models. | Sudden cardiac death is a major health problem in the industrialized world. The lethal event is typically ventricular fibrillation (VF), during which the co-ordinated regular contraction of the heart is overthrown by a state of mechanical and electrical anarchy. Understanding the excitation patterns that sustain VF is ... |
6,949 | Ventricular electrophysiology in congestive heart failure and its correlation with heart rate variability and baroreflex sensitivity: a canine model study. | This study investigated ventricular electrophysiological characteristics and the correlation between these parameters and heart rate variability (HRV) and baroreflex sensitivity (BRS) in a canine congestive heart failure (CHF) model.</AbstractText>Haemodynamics, HRV, BRS, and ventricular electrophysiological variables ... |
6,950 | Modified alternating current defibrillation: a new defibrillation technique. | Defibrillation is the only clinically effective treatment for ventricular fibrillation (VF). Early defibrillation improves the outcome and increases the chance of survival with full recovery. Immediate availability of a home-based defibrillator using mains-derived alternating current (AC) current will drastically impro... |
6,951 | Evidence regarding clinical use of microvolt T-wave alternans. | Microvolt T-wave alternans (MTWA) testing in many studies has proven to be a highly accurate predictor of ventricular tachyarrhythmic events (VTEs) in patients with risk factors for sudden cardiac death (SCD) but without a prior history of sustained VTEs (primary prevention patients). In some recent studies involving p... |
6,952 | Plesiomonas shigelloides pneumonia. | Plesiomonas shigelloides is known to cause mild to cholera-like diarrhea in most infected persons. In immunocompromised patients extra-intestinal manifestations have been described. We report the first case of pneumonia caused by P. shigelloides in a 76-year-old woman who had undergone a curative gastrectomy and esopha... |
6,953 | Effect of transport interval on out-of-hospital cardiac arrest survival in the OPALS study: implications for triaging patients to specialized cardiac arrest centers. | To identify any association between out-of-hospital transport interval and survival to hospital discharge in victims of out-of-hospital cardiac arrest.</AbstractText>Data from the Ontario Prehospital Advanced Life Support Study (January 1, 1991, to December 31, 2002), an Utstein-compliant registry of out-of-hospital ca... |
6,954 | Automated external defibrillators and simulated in-hospital cardiac arrests. | To test the hypothesis that pediatric residents would have shorter time to attempted defibrillation using automated external defibrillators (AEDs) compared with manual defibrillators (MDs).</AbstractText>A prospective, randomized, controlled trial of AEDs versus MDs was performed. Pediatric residents responded to a sim... |
6,955 | Druggable targets for sudden cardiac death prevention: lessons from the past and strategies for the future. | Sudden cardiac death (SCD) is most commonly caused by ventricular fibrillation (VF). The single largest cohort of victims is the population with little or no prior overt heart disease. Effective prevention will require long-term prophylaxis by drugs in large numbers of people identified by risk factors. This means that... |
6,956 | Intermittent changing axis deviation during acute myocarditis. | It has been rarely reported intermittent changing axis deviation also during atrial fibrillation and also during atrial flutter. Intermittent changing axis deviation during acute myocardial infarction and changing axis deviation associated with atrial fibrillation and acute myocardial infarction too have been also rare... |
6,957 | Left atrial function after ablation for paroxysmal atrial fibrillation. | Radiofrequency ablation of the pulmonary veins has been used to treat patients with paroxysmal atrial fibrillation (AF), and atrial damage after ablation is an issue of concern. To evaluate left atrial function shortly and midterm after ablation, 33 consecutive patients with paroxysmal AF were studied at baseline, 24 h... |
6,958 | Right atrial spontaneous echo contrast indicates a high incidence of perfusion defects in pulmonary scintigraphy in patients with atrial fibrillation. | This study investigated the relationship between right atrial SEC (RA-SEC) and silent pulmonary embolism (PE) in patients with nonvalvular atrial fibrillation (NVAF). Spontaneous echo contrast (SEC) within the cardiac chambers is associated with an increased risk of thromboembolism. However, most studies have examined ... |
6,959 | Brugada-type electrocardiographic pattern induced by electrocution. | Heart is one of the most frequently affected organs in electrocution. Electrical injury can cause life-threatening cardiac complications such as asystole, ventricular fibrillation, and myocardial rupture. In this case report, we describe a 22-yr-old male patient who sustained electric burn injury and presented with ele... |
6,960 | Theoretical possibility of ventricular fibrillation during use of TASER neuromuscular incapacitation devices. | TASER devices deliver electrical pulses that temporarily incapacitate suspects. This study analyzes the theoretical possibility of ventricular fibrillation (VF) induction by TASER currents.</AbstractText>Using finite element models (FEM), the results found that the skin, fat and anisotropic skeletal muscle layers atten... |
6,961 | Predicting imminent episodes of ventricular tachyarrhythmia--retrospective analysis of short R-R records from ICD. | A predictor of an imminent episode of ventricular tachyarrhythmia, namely ventricular tachycardia and ventricular fibrillation has been developed. It only uses R-R records. The previous work was based on long R-R records stored in the memory of implantable cardioverter-defibrillators. With 1.8 hour of data, sensitivity... |
6,962 | Phase space reconstruction approach for ventricular arrhythmias characterization. | Ventricular arrhythmias, especially tachycardia and fibrillation are one of the main causes of sudden cardiac death. Therefore, the development of methodologies, enable to detect their occurrence and to characterize their time evolution, is of fundamental importance. This work proposes a non-linear dynamic signal proce... |
6,963 | A simulation framework for dual chamber heart rhythm and cardiac pacing. | A previously developed open source computer model allows realistic simulation of ventricular intervals in atrial fibrillation, while taking into account of ventricular pacing. In this paper, we further improve this model and present a new simulation framework based on an integrated dual-chamber heart and pacer (IDHP) m... |
6,964 | Phase angle shift is a better determinant for catheter electrode contact with tissue compared to a catheter sensed electrogram. | Convention holds that the magnitude of an electrogram (EGM) recorded from an ablation catheter indicates proximity to the tissue and may be used to guide tip placement. The shift in capacitance (phase angle) as the electrode touches the tissue may be a better guide. We compared these two methods over a range of distanc... |
6,965 | Nonlinear analysis of the ECG during atrial fibrillation in patients for low energy internal cardioversion. | The goal of this study was to investigate the usefulness of nonlinear analysis in determining the success of low energy internal cardioversion (IC) in patients with atrial fibrillation (AF). Nonlinear analysis has previously been used for characterizing AF patterns, and spontaneous termination in its paroxysmal form. H... |
6,966 | Constrained temporal extraction of the atrial rhythm in Atrial Fibrillation episodes. | The extraction of the Atrial Activity from the Ventricular Activity in Atrial Fibrillation episodes is a must for clinical analysis. We follow the semi Blind Source Extraction S-BSE approach to solve the problem. The proposed algorithm modifies the BSE contrast function to satisfy the prior knowledge about the spectral... |
6,967 | Frequency distribution effects of anchored mother rotors--a computer model study. | Recent findings indicate that major organized centers (mother rotors) can maintain ventricular fibrillation (VF). In computer models the mother rotors can be induced by local shortening of the action potential duration (APD) in the cardiac tissue. Because of the fact that these rotors tend to drift away towards regions... |
6,968 | A sensitive algorithm for automatic detection of space-time alternating signals in cardiac tissue. | Alternans, a beat-to-beat alternation in cardiac signals, may serve as a precursor to lethal cardiac arrhythmias, including ventricular tachycardia and ventricular fibrillation. Therefore, alternans is a desirable target of early arrhythmia prediction/detection. For long-term records and in the presence of noise, the d... |
6,969 | Application of filtering methods for removal of resuscitation artifacts from human ECG signals. | Band-pass, Kalman, and adaptive filters are used for removal of resuscitation artifacts from human ECG signals. A database of separately recorded human ECG and animal resuscitation artifact signals is used for evaluation of the methods. The considered performance criterion is the signal-to-noise ratio (SNR) improvement... |
6,970 | Cardiac resynchronization therapy: long-term alternative to cardiac transplantation? | Cardiac transplantation remains the gold standard for treating end-stage heart failure. However, because of donor shortage and posttransplant complications alternative options are needed.</AbstractText>We investigated the impact of cardiac resynchronization therapy on clinical outcome in 545 patients with left bundle-b... |
6,971 | Distorted T-vector loop and increased heart rate are associated with ventricular fibrillation in a porcine ischemia-reperfusion model. | The ventricular repolarization (VR) response to short-lasting coronary occlusion has been characterized by 3-dimensional vectorcardiography during angioplasty in humans; the T-vector loop becomes distorted (increased T(avplan)) and more circular (decreased T(eigenvalue)), but these changes have not been related to vent... |
6,972 | [Effects of Shen-song-yang-xin capsule on ventricular arrhythmias in ischemia/reperfusion: experiment with rats]. | To investigate the effects of Shen-song-yang-xin capsule containing ginseng, ophiopogon root, red sage root, etc, on the ventricular arrhythmias caused by ischemic/reperfusion.</AbstractText>Thirty SD rats were randomly divided into 2 equal groups: Shen-song-yang-xin group undergoing gastric infusion of Shen-song-yang-... |
6,973 | Out-of-hospital ventricular fibrillation in three adolescents. | We describe three adolescents who experienced sudden cardiac arrest due to ventricular fibrillation in an out-of-hospital setting and survived with good neurological outcome despite delayed time to defibrillation. All three were treated with prolonged cardiopulmonary resuscitation (CPR) by certified basic life support ... |
6,974 | [Antithrombotic therapy in primary and secondary stroke prevention of cardiac patients and in acute stroke]. | Primary vascular prevention: the prevalence of cardiogenic stroke will increase in the future. All patients with atrial fibrillation but without any ischemic stroke, must undergo a rigorous risk evaluation, which is crucial for pharmacotherapy. Atrial fibrillation is an important risk factor for stroke, therefore patie... |
6,975 | The predictive value of plasma brain natriuretic peptide for the recurrence of atrial fibrillation six months after external cardioversion. | The aim of this study was to assess the predictive value of plasma brain natriuretic peptide (BNP) level for the recurrence of atrial fibrillation (AF) after successful cardioversion in patients with persistent AF.</AbstractText>The study included 58 patients (36 females, 22 males; mean age 59 years) with preserved lef... |
6,976 | [Acute anterior myocardial infarction due to left main coronary artery thrombosis]. | Acute anterior myocardial infarction (MI) due to left main coronary artery thrombosis is a rare entity with a very high mortality rate. A 72-year-old male patient was admitted with chest pain of two-hour onset that appeared during syncope. Electrocardiography showed first-degree AV block, right bundle branch block, lef... |
6,977 | Prediction of fatal or near-fatal cardiac arrhythmia events in patients with depressed left ventricular function after an acute myocardial infarction. | To determine whether risk stratification tests can predict serious arrhythmic events after acute myocardial infarction (AMI) in patients with reduced left ventricular ejection fraction (LVEF < or = 0.40).</AbstractText>A total of 5869 consecutive patients were screened in 10 European centres, and 312 patients (age 6... |
6,978 | Revelation of Brugada electrocardiographic pattern during a febrile state associated with acute myocardial infarction. | The prevalence of the Brugada-type ECG and its natural history are still unclear. The Brugada syndrome is usually identified by a characteristic Brugada-type ECG that consists of ST elevation of a coved type in the precordial leads V1 to V3 and ventricular fibrillation that can lead to sudden cardiac death, although af... |
6,979 | Early and late outcomes in minimally invasive mitral valve repair: an eleven-year experience in 707 patients. | This study analyzes a single institution experience with minimally invasive mitral valve repair and evaluates long-term surgical outcomes of morbidity, mortality, and rates of reoperation. Late follow-up of mitral regurgitation and left ventricular function were also assessed.</AbstractText>Between August 1996 and Octo... |
6,980 | Complex adrenergic and inflammatory mechanisms contribute to phase 2 ventricular arrhythmias in anaesthetized rats. | The mechanisms responsible for phase 2 (infarct-related) ventricular arrhythmias remain unclear. We have investigated the role of alpha(1) and beta(1) adrenoceptor activation and the interaction of this with infarct neutrophil accumulation, in anaesthetized rats.</AbstractText>Neutrophil-replete Sprague-Dawley rats (n ... |
6,981 | Relationship between atrial fibrillation and blunted hyperemic myocardial blood flow in patients with hypertrophic cardiomyopathy. | Atrial fibrillation (AF) and coronary microvascular dysfunction (CMD) are common in hypertrophic cardiomyopathy (HCM), but whether they are associated is unclear. We assessed the relationship between AF and CMD in HCM.</AbstractText>Global hyperemic myocardial blood flow (hMBF) was measured in 95 HCM patients (16 with,... |
6,982 | The additive prognostic value of perfusion and functional data assessed by quantitative gated SPECT in women. | The aim of this study was to assess the prognostic value of technetium-99m tetrofosmin gated SPECT imaging in women using quantitative gated single photon emission computed tomography (SPECT) imaging.</AbstractText>We followed 453 consecutive female patients. Average follow-up was 1.33 years (max. 2.55). Hard endpoints... |
6,983 | Electrical storm reversible by isoproterenol infusion in a striking case of early repolarization. | A 40-year-old woman was referred to intensive care unit after recurrent ventricular fibrillation. She was free of cardiac medical history or medications. The resting ECG displayed an extended early repolarization in the inferior leads and all the precordial leads. Incessant ventricular fibrillations justified a treatme... |
6,984 | Chamber-specific effects of hypokalaemia on ventricular arrhythmogenicity in isolated, perfused guinea-pig heart. | Diuretic-induced hypokalaemia has been shown to promote cardiac arrhythmias in hypertensive patients. The present study was designed to determine whether hypokalaemia increases arrhythmic susceptibility of the left ventricle (LV) or the right ventricle (RV), or both. Proarrhythmic effects of hypokalaemic perfusion (2.5... |
6,985 | A least mean-square filter for the estimation of the cardiopulmonary resuscitation artifact based on the frequency of the compressions. | Cardiopulmonary resuscitation (CPR) artifacts caused by chest compressions and ventilations interfere with the rhythm diagnosis of automated external defibrillators (AED). CPR must be interrupted for a reliable diagnosis. However, pauses in chest compressions compromise the defibrillation success rate and reduce perfus... |
6,986 | Increased N-terminal-pro-B-type natriuretic peptide levels in patients with appropriate implantable defibrillator therapies. | The ability to better identify predictors of implantable defibrillator therapies in patients with heart failure would allow the optimization of patient selection. N-terminal-Pro-B-type natriuretic peptide (NT-ProBNP) is secreted by the ventricles in response to myocardial stretching and is a sensitive marker of left ve... |
6,987 | Aspects on the increase in bystander CPR in Sweden and its association with outcome. | To describe changes in the proportion of bystanders performing cardiopulmonary resuscitation (CPR) in out of hospital cardiac arrest (OHCA) in Sweden and to study the impact of bystander CPR on ventricular fibrillation and on survival during various times.</AbstractText>All patients who suffered from OHCA in Sweden in ... |
6,988 | Effects of stomach inflation on haemodynamic and pulmonary function during cardiopulmonary resuscitation in pigs. | Stomach inflation during cardiopulmonary resuscitation (CPR) is frequent, but the effect on haemodynamic and pulmonary function is unclear. The purpose of this study was to evaluate the effect of clinically realistic stomach inflation on haemodynamic and pulmonary function during CPR in a porcine model.</AbstractText>A... |
6,989 | Impact of QT variables on clinical outcome of genotyped hypertrophic cardiomyopathy. | Although QT variables such as its interval and/or dispersion can be clinical markers of ventricular tachyarrhythmia, few data exist regarding the role of QT variables in genotyped hypertrophic cardiomyopathy (HCM). Therefore, we analyzed QT variables in genotyped subjects with or without left ventricular hypertrophy (L... |
6,990 | Antiarrhythmic drug therapy for atrial fibrillation: focus on atrial selectivity and safety. | Atrial fibrillation (AF) is a highly prevalent arrhythmia and responsible for significant morbidity, mortality and health care cost. The prevalence of AF is expected to increase markedly with the aging population. The use of conventional antiarrhythmic agents has been limited by potentially fatal ventricular proarrhyth... |
6,991 | Lack of clinical predictors of optimal V-V delay in patients with cardiac resynchronization devices. | Cardiac resynchronization therapy (CRT) is a well-established therapy for patients with moderate-to-severe heart failure (HF), left ventricular dysfunction with an ejection fraction <or= 35% and a QRS on the surface electrocardiogram of >or=130 msec. Device optimization is often performed, adjusting the timing of... |
6,992 | Reversible cardiomyopathy provoked by focal ventricular arrhythmia originating from the base of the posterior papillary muscle. | A new distinct clinical syndrome comprising of ventricular tachycardia or frequent premature beats arising from the base of the posterior papillary muscle has recently been reported. The cardiac arrhythmia had a non-reentrant mechanism and none of the patients had left ventricular dysfunction.</AbstractText>We report o... |
6,993 | Demonstration of left ventricular dyssynchrony and resynchrony by ECG-gated SPECT with cardioGRAF in a patient with advanced heart failure and narrow QRS complex. | Accurate objective quantification of left ventricular (LV) dyssynchrony is a key to selecting candidates for cardiac resynchronization therapy (CRT), especially when screening among patients with a narrow QRS. CardioGRAF (cardio Gated single photon emission computed tomography Regional Assessment for left ventricular F... |
6,994 | An unusual resolution of T-wave oversensing in an implantable cardioverter defibrillator in a child with long QT syndrome. | T-wave oversensing poses a clinical challenge often resulting in inappropriate therapies and shocks. T-wave oversensing can often be resolved by certain programmable adjustments while accepting a small risk of undersensing ventricular fibrillation. The following case depicts a girl with LQT whose transvenous defibrilla... |
6,995 | The natural history of asymptomatic ventricular pre-excitation a long-term prospective follow-up study of 184 asymptomatic children. | The aim of this study was to describe the natural history of asymptomatic ventricular pre-excitation in children and to determine predictors of potentially life-threatening arrhythmic events.</AbstractText>Sudden death can be the first clinical manifestation in asymptomatic children with ventricular pre-excitation, but... |
6,996 | [Pharmacologic treatment of atrial fibrillation].<Pagination><StartPage>303</StartPage><EndPage>308</EndPage><MedlinePgn>303-8</MedlinePgn></Pagination><Abstract><AbstractText>Atrial fibrillation is a supraventricular tachyarrhythmia characterized by uncoordinated atrial activation with consequent deterioration of atri... | Atrial fibrillation is a supraventricular tachyarrhythmia characterized by uncoordinated atrial activation with consequent deterioration of atrial mechanical function. It is a common arrhythmia that presents various treatment options. Pharmacologic therapy is used to maintain sinus rhythm, to control the ventricular re... |
6,997 | Advanced cardiac life support and defibrillation in severe hypothermic cardiac arrest. | The application of Advanced Cardiac Life Support (ACLS) in severe hypothermic cardiac arrest remains controversial. While the induction of mild hypothermia has been shown to improve outcomes in patients already resuscitated from cardiac arrest, it is unknown whether ACLS protocols are effective during the resuscitation... |
6,998 | Antiarrhythmic and arrhythmogenic effects of L-carnitine in ischemia and reperfusion. | Isolated rat hearts were subjected to 30-min coronary artery occlusion followed by 120-min reperfusion. The hearts (n=8-12) were perfused with Krebs-Henseleit solution enriched with L-carnitine (0.5, 2.5 and 5 mM) for 10 min before and after ischemia or reperfusion and for the whole period of ischemia and reperfusion. ... |
6,999 | High defibrillation threshold in patients with implantable defibrillator: how effective is the subcutaneous finger lead? | Even in the era of high output implantable cardioverter defibrillator (ICD) devices, a certain proportion of patients cannot be successfully defibrillated with 10 J safety margin. In practice, either the use of a single- or double-coil lead does not guarantee successful termination of induced ventricular fibrillation. ... |
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