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- Title
T Wave Alternans in Idiopathic Long--QT Syndrome: Insight from Body Surface Mapping.
- Authors
Shimizu, Wataru; Kamakura, Shiro; Arakaki, Yoshio; Kamiya, Tetsuro; Shimomura, Katsuro
- Abstract
Body surface mapping was recorded during T wove alternans in two patients with idiopathic long QT syndrome. Eighty-seven lead ECGs of two consecutive beats during T wave alternans demonstrated that alternating changes in the morphology and polarity of the T wave existed mainly in the left frontal chest. The QRST isointegral maps of the same two consecutive beats showed alternation of a large negative area appearing mainly in the left frontal chest. These results indicate that T wave alternans in the two patients were related to alternate heterogeneous prolongation of the action potential duration in this region.
- Subjects
SYNDROMES; HEART beat; HEART conduction system; ELECTROCARDIOGRAPHY; ELECTRODIAGNOSIS
- Publication
Pacing & Clinical Electrophysiology, 1996, Vol 19, Issue 7, p1130
- ISSN
0147-8389
- Publication type
Article
- DOI
10.1111/j.1540-8159.1996.tb03426.x