نتایج جستجو برای: ventricular node
تعداد نتایج: 320799 فیلتر نتایج به سال:
TORRES, J. C.,E.T. ANGELAKOS AND A.H. HEGNAUER. Effect ofartijcially controlled heart rate on the incidence of ventricular Jibrillation in hypothermia. Am. J. Physiol. 195(2): 437-439. [email protected] dogs were subjected to auricular and five to ventricular driving throughout the period of cooling. All animals in both groups succumbed to ventricular fibrillation at mean temperatures of 21.3OC and 20....
BACKGROUND Recent evidence suggests that atrioventricular junctional reentrant tachycardia (AVJRT) uses a reentrant circuit that involves the atrioventricular (AV) node, the atrionodal connections, and perinodal atrial tissue. Electrogram morphology has been used to target the delivery of radiofrequency energy to the site of the "slow pathway," a component of this reentrant circuit. The aim of ...
Background. Recent evidence suggests that atrioventricular junctional reentrant tachycardia (AVJRT) uses a reentrant circuit that involves the atrioventricular (AV) node, the atrionodal connections, and perinodal atrial tissue. Electrogram morphology has been used to target the delivery of radiofrequency energy to the site of the "slow pathway," a component of this reentrant circuit. The aim of...
We report successful surgical management of a 31-year-old man with a left ventricular thrombus following heart failure due to cardiac sarcoidosis. Preoperative echocardiography showed diffuse hypokinesis and a mobile ball-like thrombus in the left ventricle. Computed tomography revealed a left ventricular tumor and bilateral hilar lymphadenopathy, while MRI of the brain showed small infarctions...
Atrial infarction is found in approximately 17 percent of autopsy-proven cases of myocardial infarction, but is a frequently missed clinical diagnosis. The antemortem diagnosis of atrial infarction occurring in the absence of ventricular infarction has not been previously reported. We present a patient with ischemic chest discomfort associated with paroxysmal atrial fibrillation. Electrocardiog...
Introduction: Despite extensive studies about effects of Crataegus monogyna on cardiovascular diseases yet, a few study has been undertaken antiarrhythmic property of this plant. Aims of the present study were: 1) To determine the protective role of methanolic extract of C.monogyna on the rate-dependent model and the concealed conduction . 2) To explore the role of Na+-K+ A TPase in the protect...
Human mutations in Nkx2-5 lead to progressive cardiomyopathy and conduction defects via unknown mechanisms. To define these pathways, we generated mice with a ventricular-restricted knockout of Nkx2-5, which display no structural defects but have progressive complete heart block, and massive trabecular muscle overgrowth found in some patients with Nkx2-5 mutations. At birth, mutant mice display...
• The relationship between the functional refractory periods of the specialized cardiac conduction system and of the ventricular muscle is of major importance in the genesis of ventricular fibrillation by a single premature beat arising in the specialized conducting system. Wiggers and Wegria demonstrated that premature ventricular excitation must occur in late systole during the inscription of...
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