Affiliation:
1. Masonic Medical Research Laboratory Utica, New York 13501
Abstract
Reciprocal beats between sinus node and atrium were studied in isolated rabbit heart tissue by microelectrode techniques. Early premature atrial responses which entered the sinus node frequently emerged to re-excite the atrium as "echoes." When the premature atrial beats discharged some but not all nodal areas, the atrial echoes, in turn, appeared to re-enter the sinus node. Repetitive reciprocation involving the sino-atrial circuit was occasionally observed. Anatomic and temporal patterns of excitation at multiple recording sites suggest that "entrance" block and slow conduction of premature impulses within the sinus node may explain the observed reciprocation. The results support the hypothesis that self-sustained reciprocation in a sino-atrial circuit might be responsible for some cases of paroxysmal atrial tachycardia.
Publisher
Ovid Technologies (Wolters Kluwer Health)
Subject
Cardiology and Cardiovascular Medicine,Physiology
Reference12 articles.
1. Essentials of Electrocardiography. New York;ASHMAN R.;Macmillan Co.,1938
2. The mechanism of auricular paroxysmal tachycardia
3. Electrophysiology of the Heart. New York;HOFFMAN B. F.;McGraw-Hill,1960
4. Re-excitation of the atrium. “The echo phenomenon”
5. Spread of Excitation from the Sinus Node
Cited by
115 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献