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- Title
Double Ventricular Response by a Single Ventricular Extrastimulus to the Inner Loop of Reentry in a Patient Without Apparent Heart Disease.
- Authors
Shimizu, Akihiko; Yamagata, Toshihiko; Yoshiga, Yasuhiko; Hayano, Tomoko; Ohmura, Masato; Kimura, Masayasu; Itagaki, Kazuo; Matsuzaki, Masunori
- Abstract
In a patient without apparent heart disease, a ventricular extrastimulus delivered from the left ventricular apex where the electrogram was recorded 30 ms after the onset of the QRS complex during VT advanced the second QRS complex, but not the first QRS complex. The morphology of the second QRS complex was the same as that of VT. The postpacing interval was the same as the cycle length of the VT. These findings indicated that the site of stimulation was at the inner loop of the reentry circuit of the VT. A ventricular extrastimulus with a shorter coupling interval advanced the first and second QRS complexes, indicating that the ventricle was activated by antidromic and orthodromic activation from the extrastimulus. Radiofrequency ablation at that site of stimulation terminated the VT and no further VT could be induced.
- Subjects
RIGHT heart ventricle; LEFT heart ventricle; PATIENTS; VENTRICULAR tachycardia; ELECTROPHYSIOLOGY; ELECTROTHERAPEUTICS; CARDIAC pacing
- Publication
Pacing & Clinical Electrophysiology, 2000, Vol 23, Issue 11, p1691
- ISSN
0147-8389
- Publication type
Article
- DOI
10.1046/j.1460-9592.2000.01691.x