Post-extrasystolic ST, T Changes in the Exercise Vectorcardiogram with Frank's Lead
| Autor: | Masahiro Murayama, Chia-Maou Chen, Kenichi Harumi, Satoru Murao |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Adult
Male Aortic Valve Insufficiency Physical Exertion Vectorcardiography Ischemia Beat (acoustics) Angina Pectoris Angina medicine Humans In patient skin and connective tissue diseases Aged business.industry Lead system Aortic Valve Stenosis Middle Aged medicine.disease T vector Intermediate type Stenosis Anesthesia Hypertension Female sense organs Cardiology and Cardiovascular Medicine business |
| Zdroj: | Japanese Heart Journal. 12:185-190 |
| ISSN: | 1348-673X 0021-4868 |
| DOI: | 10.1536/ihj.12.185 |
| Popis: | Post-extrasystolic ST, T changes were analyzed in the exercise vector-cardiogram, using Frank's lead system. (1) The magnitude of ST vector of the post-extrasystolic sinus beat after exercise was not changed in a normal subject, slightly increased in a hypertensive patient and a patient with aortic stenosis and insufficiency, slightly decreased in a patient with intermediate type and markedly increased in patients with angina pectoris, comparing to that of the preceding sinus beat of extrasystole. (2) The magnitude of the maximal T vector of the post-extrasystolic sinus beat after exercise was decreased in a normal subject, a hypertensive patient and a patient with aortic stenosis and insufficiency, and was increased in a patient with intermediate type. The direction of the maximal T vector of the post-extrasystolic sinus beat after exercise was not changed in non-ischemic patients and changed spatially in ischemic patients. (3) There were no marked changes in the shape of T loop of the post-extrasystolic sinus beat after exercise in non-ischemic patients and increased widening or narrowing of T loop was seen in the post-extrasystolic sinus beat of ischemic patients, comparing to T loop in the preceding sinus beat of extrasystole. (4) It is concluded that there was the specific pattern of the post-extrasystolic ST, T changes for local ischemia, that is, they occurred in a way that ST, T changes of ischemic type produced by exercise were accentuated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|