Electrical impulse conduction in pulmonary veins
نویسندگان
چکیده
منابع مشابه
Electrical impulse conduction in pulmonary veins.
It has been documented that the cardiac musculature of many mammalia, including man, extends from the heart along the pulmonary veins to the lungs, and, at least in some rodentia, as far as the small venules, and that smooth muscle is not present (1-3). However, these reports are of structural studies only, and in the one publication where a speculation is made concerning the spread of the cont...
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BACKGROUND Paroxysmal atrial fibrillation in patients is often initiated by foci in the pulmonary veins. The mechanism of these initiating arrhythmias is unknown. The aim of this study was to determine electrophysiological characteristics of canine pulmonary veins that may predispose to initiating arrhythmias. METHODS AND RESULTS Extracellular recordings were obtained from the luminal side of...
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An analysis has been made of the electrical responses recorded on the surface and within the substance of the first sacral spinal segment when the contained motoneurons are excited by single and repeated antidromic ventral root volleys. A succession of negative deflections, designated in order of increasing latency m, i, b, d, has been found. Each of those deflections possesses some physiologic...
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BACKGROUND The roles of complex muscle sleeve geometry and fiber orientation in the pulmonary veins (PVs) in wave-front propagation are poorly understood. METHODS AND RESULTS We mapped the left superior PV (LSPV, n=7) and left inferior PV (LIPV, n=4) of dogs with 420 bipolar electrodes (1-mm resolution) and performed detailed histological examination. In the anterior LSPV-left atrial (LA) jun...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1974
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(74)85957-6