Differential effects of heptanol and high extracellular potasium in reentrant ventricular tachycardia in anisotropic myocardium
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منابع مشابه
Differential effects of a segment of slow conduction on reentrant ventricular tachycardia in the rabbit heart.
BACKGROUND The purpose of this study was to compare differential effects of a segment of slow conduction during ventricular tachycardia (VT) due to depression of the action potential and electrical uncoupling. METHODS AND RESULTS In 33 Langendorff-perfused rabbit hearts, a ring of anisotropic left ventricular subepicardium was created by a cryoprocedure. Reentrant VT was produced by increment...
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The cells of all tissues are coupled by gap junctions, with the exception of blood and adult skeletal muscle cells. Gap junctions provide for homoeostasis and integrative function by mediating the exchange of ions and chemical second messenger molecules between adjacent cells. The electrical signaling provided by these specialized intercellular junctions is perhaps best understood in the heart,...
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We measured the conduction characteristics at the epicardial surface of the left anterior ventricular wall in the in situ canine heart before and 3 to 5 days (n = 9 dogs) after permanent occlusion of the left anterior descending coronary artery (LAD). During ventricular stimulation generating wavefronts conducted along the longitudinal or the transverse fiber direction, 61 unipolar electrograms...
متن کاملBundle Branch Reentrant Ventricular Tachycardia
Bundle branch reentrant (BBR) tachycardia is an uncommon form of ventricular tachycardia (VT) incorporating both bundle branches into the reentry circuit. The arrhythmia is usually seen in patients with an acquired heart disease and significant conduction system impairment, although patients with structurally normal heart have been described. Surface ECG in sinus rhythm (SR) characteristically ...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1991
ISSN: 0735-1097
DOI: 10.1016/0735-1097(91)90977-h