Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities

John Miller, G. S. Tyson, W. C. Hargrove, J. A. Vassallo, M. E. Rosenthal, M. E. Josephson

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Background: Patients with sustained ventricular tachycardia after acute myocardial infarction frequently have characteristic abnormalities of left ventricular endocardial electrical activity, including fractionated (prolonged, multicomponent, low-amplitude), split (having discrete widely separated deflections), and late (extending after the end of the QRS complex) electrograms. The exact cause and source of these electrograms are not clear. Methods and Results: In this study, endocardial electrograms from 18 patients were recorded with a 20-electrode array from the same area immediately before and immediately after resection of subendocardial tissue at the time of surgery for ventricular tachycardia. Electrograms could be compared before and after resection from 298 of 360 (83%) of the electrodes. Before resection, split electrograms were present in 130 (44%) and late components in 81 (27%) of the recordings. Recordings made after resection showed fewer abnormalities, including complete absence of split electrograms as well as all previously recorded late components (P

Original languageEnglish (US)
Pages (from-to)2385-2391
Number of pages7
JournalCirculation
Volume91
Issue number9
StatePublished - 1995
Externally publishedYes

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Ventricular Tachycardia
Electrodes
Myocardial Infarction

Keywords

  • electrocardiography
  • endocardium
  • mapping
  • tachycardia

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

Cite this

Miller, J., Tyson, G. S., Hargrove, W. C., Vassallo, J. A., Rosenthal, M. E., & Josephson, M. E. (1995). Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities. Circulation, 91(9), 2385-2391.

Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities. / Miller, John; Tyson, G. S.; Hargrove, W. C.; Vassallo, J. A.; Rosenthal, M. E.; Josephson, M. E.

In: Circulation, Vol. 91, No. 9, 1995, p. 2385-2391.

Research output: Contribution to journalArticle

Miller, J, Tyson, GS, Hargrove, WC, Vassallo, JA, Rosenthal, ME & Josephson, ME 1995, 'Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities', Circulation, vol. 91, no. 9, pp. 2385-2391.
Miller J, Tyson GS, Hargrove WC, Vassallo JA, Rosenthal ME, Josephson ME. Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities. Circulation. 1995;91(9):2385-2391.
Miller, John ; Tyson, G. S. ; Hargrove, W. C. ; Vassallo, J. A. ; Rosenthal, M. E. ; Josephson, M. E. / Effect of subendocardial resection on sinus rhythm endocardial electrogram abnormalities. In: Circulation. 1995 ; Vol. 91, No. 9. pp. 2385-2391.
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