The mechanisms of ventricular tachycardia in humans determined by intraoperative recording of the electrical activation sequence |
| |
Authors: | J W Mason E B Stinson P E Oyer R A Winkle S Hunt K P Anderson G C Derby |
| |
Affiliation: | 1. Cardiac Arrhythmia Study Unit, Division of Cardiology and Department of Cardiovascular Surgery, Standford, USA;2. University Medical Center; and Division of Cardiology, University of Utah, Salt Lake City, USA |
| |
Abstract: | We recorded ventricular activation sequence during ventricular tachycardia in 76 patients who underwent surgical therapy of refractory ventricular tachycardia. Ventricular tachycardia arose from a discrete site (focal origination) in 28 patients (37%) or resulted from reentry around scar (macroreentry) in 22 patients (29%). The mechanism responsible for ventricular tachycardia was not discernable in the remaining 26 patients (34%), usually because of inadequacy of activation data. We conclude: (1) although focal originating of ventricular tachycardia is common, more frequently the mechanism is either macroreentry or uncertain, as assessed by conventional recording techniques; thus, a search for the "site of earliest activation" during ventricular tachycardia frequently may fail to direct rationally the operative procedure; (2) conventional techniques for intraoperative study of electrical activation during ventricular tachycardia are inadequate. |
| |
Keywords: | ventricular tachycardia ventricular activation electrophysiology |
本文献已被 ScienceDirect 等数据库收录! |