Nonclinical Ventricular Tachycardia in the WolflF‐Parkinson‐White Syndrome
Identifieur interne : 004F66 ( Main/Exploration ); précédent : 004F65; suivant : 004F67Nonclinical Ventricular Tachycardia in the WolflF‐Parkinson‐White Syndrome
Auteurs : Simon Milstein [Canada] ; Arjun D. Sharma [Canada] ; George J. Klein [Canada]Source :
- Pacing and Clinical Electrophysiology [ 0147-8389 ] ; 1985-09.
English descriptors
Abstract
Between September 1980 and June 1984 we assessed the specificity of induction of ventricular tachycardia (VT) with one or two ventricular extrastimuli in a consecutive series of 148 patients undergoing electrophysioiogical assessment for the Wolff‐Parkinson‐White (WPW) syndrome by standard electrophysiological techniques. Fifteen patients (10%) had six or more beats of VT induced by one ventricular extrastimulus after a ventricular drive (9 patients), two ventricular extrastimuli during reciprocating tachycardia (6 patients), and during a single atrial extrastimulus (1 patient). None of the six men and nine women, aged 16–61 years, had apparent heart disease. VT lasted for 20 ± 14 (mean ± standard deviation) cycles with a cycle length of 235 ms ± 27 and was generally polymorphic. One patient had ventricular fibrillation. These patients were compared to 15 age‐ and sex‐matched patients studied in the same time period. There was no difference in anterograde elective refractory period of the accessory pathway (316 ± 92 vs 319 ± 68 ms), ventricular effective refractory period (2I8 ± 12 vs 227 ± 23), shortest pacing cycle length maintaining 1:1 anterograde conduction over the accessory pathway (306 ± 132 vs 320 ± 67) or minimum R‐R interval between preexcited beats during atrial flbrillation (280 ± 68 vs 294 ± 105). All patients are alive and well over a follow‐up interval of 20 ± 11 months on no antiarrhythmic therapy (13 patients) or on propranolol (2 patients). We conclude that a high percentage (10.1%) of WPW patients undergoing standard electrophysiological assessment have induction of nonclinical ventricular tachycardia with conservative ventricular extrastimulation techniques. The latter is a nonspecific finding in this patient group.
Url:
DOI: 10.1111/j.1540-8159.1985.tb05880.x
Affiliations:
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Fifteen patients (10%) had six or more beats of VT induced by one ventricular extrastimulus after a ventricular drive (9 patients), two ventricular extrastimuli during reciprocating tachycardia (6 patients), and during a single atrial extrastimulus (1 patient). None of the six men and nine women, aged 16–61 years, had apparent heart disease. VT lasted for 20 ± 14 (mean ± standard deviation) cycles with a cycle length of 235 ms ± 27 and was generally polymorphic. One patient had ventricular fibrillation. These patients were compared to 15 age‐ and sex‐matched patients studied in the same time period. There was no difference in anterograde elective refractory period of the accessory pathway (316 ± 92 vs 319 ± 68 ms), ventricular effective refractory period (2I8 ± 12 vs 227 ± 23), shortest pacing cycle length maintaining 1:1 anterograde conduction over the accessory pathway (306 ± 132 vs 320 ± 67) or minimum R‐R interval between preexcited beats during atrial flbrillation (280 ± 68 vs 294 ± 105). All patients are alive and well over a follow‐up interval of 20 ± 11 months on no antiarrhythmic therapy (13 patients) or on propranolol (2 patients). We conclude that a high percentage (10.1%) of WPW patients undergoing standard electrophysiological assessment have induction of nonclinical ventricular tachycardia with conservative ventricular extrastimulation techniques. The latter is a nonspecific finding in this patient group.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Milstein, Simon" sort="Milstein, Simon" uniqKey="Milstein S" first="Simon" last="Milstein">Simon Milstein</name></noRegion><name sortKey="Klein, George J" sort="Klein, George J" uniqKey="Klein G" first="George J." last="Klein">George J. Klein</name><name sortKey="Sharma, Arjun D" sort="Sharma, Arjun D" uniqKey="Sharma A" first="Arjun D." last="Sharma">Arjun D. Sharma</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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