نتایج جستجو برای: atrial dissociation
تعداد نتایج: 126823 فیلتر نتایج به سال:
The classic features of Wolff-Parkinson-White syndrome developed in a 49 year old man after he was given the heart of a donor who had had a normal electrocardiogram. The recipient showed type A pre-excitation on the surface electrocardiogram and clinically important paroxysmal supraventricular tachycardia. An electrophysiological study showed a left sided accessory pathway and dissociation betw...
background: about half of all patients who undergo mitral valve surgery suffer from atrial fibrillation (af). cox described the surgical cut-and-sew maze procedure, which is an effective surgical method but has some complications. this study was designed to evaluate the efficacy of a substitution method of radiofrequency ablation (rfa) for patients undergoing mitral valve surgery with af. metho...
Electrical response to acetylcholine (ACh) in human atrial myocytes has been shown to be qualitatively similar to that in other mammalian atrial cells under whole-cell voltage-clamp conditions and that ACh shifted the reversal potential of the membrane current to the hyperpolarizing direction. Recently, however, our laboratory reported that the density of muscarinic K+ channel [IK(ACh)] in atri...
a 54-year-old man referred to our center with barlow’s disease and severe mitral regurgitation. he had atrial fibrillation (af) rhythm, with a mildly enlarged left atrium (la). transesophageal echocardiography (tee) showed no clot in the la and la appendage; there was only mild spontaneous echo contrast in the la appendage. the patient underwent mitral valve repair and the maze operation, durin...
Apatient with dilated cardiomyopathy and aborted sudden death was admitted for repeated shocks from his Guidant Ventak Prizm dual chamber implantable cardioverterdefibrillator (ICD). Interrogation of stored events over the last six months revealed 46 episodes at a rate of 140/min, interpreted as ventricular tachycardia (VT). These were usually interrupted by programmed overdrive ventricular pac...
Background-During ventricular echoes, reentrant excitation is supposed to involve 2 functionally distinct pathways in the atrioventricular (AV) nodal area. The exact pathway of reentrant excitation is unknown. The objectives of this study were to analyze electrical activity in the AV nodal area after ventricular stimulation and during ventricular echoes and to assess the role of perinodal atria...
BACKGROUND The existence of an atypical fast-slow (F/S) atrioventricular nodal reentrant tachycardia (AVNRT) including a superior (sup) pathway with slow conductive properties and an atrial exit near the His bundle has not been confirmed. METHODS AND RESULTS We studied 6 women and 2 men (age, 74 ± 7 years) with sup-F/S-AVNRT who underwent successful radiofrequency ablation near the His bundle...
The effect of atrial contraction on left ventricular function in six patients with varying degrees of mitral stenosis was determined by utilizing the pressure gradient technique to measure instantaneous aortic blood flow and pressure. Aortic flow was measured as ventricular rate was controlled by right ventricular pacing to create A-V (atrioventricular) dissociation at varying rates (90-150 bea...
Abstract Atrial fibrillation is responsible for a significant and steadily rising burden. Simultaneously, the treatment options atrial are far from optimal. Personalized simulations of cardiac electrophysiology could assist clinicians in risk stratification therapy planning fibrillation. However, use personalized clinics currently not possible due to either too high computational costs or non-s...
Introduction: Earthquake trauma has a wide range of psychological consequences in the affected areas. In addition, the role of Peritraumatic dissociation - as one of the consequences of trauma and the shaping factor of psychological problems - is still unknown. Therefore, the aim of the present study was to Modeling Structural Relationships between Trauma experience and Peritraumatic dissociati...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید