A-V NODAL DUAL PATHWAYS AND PAROXYSMAL SUPRAVENTRICULAR TACHYCARDIA
作者机构：Department of Cardiology 2nd Affiliated Hospital Tianjin Medical College Tianjin
出 版 物：《CHINESE MEDICAL JOURNAL》 (Chinese Medical Journal)
年 卷 期：1985年第98卷第8期
页 面：568-574页
核心收录：
学科分类：13[艺术学] 1302[艺术学-音乐与舞蹈学]
摘 要：In 16 cases of paroxysmal supraventriouler tachycardia（PSVT）,A-V nodal dual pathways were found in nine, and PSVT was initiated with programmed stimulation in seven of the nine cases. In the remaining two cases, atrial echo was seen in one, but in another, PSVT could not be initiated, and atrial echo was not seen. Among the nine cases, there was an unusual one which showed antegrade conduction through fast pathway and retrograde conduction through slow pathway. In seven of the nine cases, there was interruption of H1H2/A1A2 curve and jump phenomenon of H1H2, while in one case the curve was smooth. In electrophysiologic studies, A-V dual pathways were not seen in 53 cases without PSVT for various reasons. The authors believe that A-V nodal dual pathways are functional abnormality affected by autonomous nervous system. Whether PSVT may be initiated in cases with nodal dual pathways or not depends upon the equilibrium between the rates of coduction in these two pathways and the length of the refractory period.
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