Patterns of ventricular activity during catheter defibrillation

Morton Maimon Mower, M. Mirowski, J. F. Spear, E. N. Moore

Research output: Contribution to journalArticle

Abstract

In order to clarify the mechanism of ventricular catheter defibrillation in which the electrode distribution and the low energy requirements make a simultaneous depolarization of the entire myocardium unlikely, the electrocardiograms recorded during 120 catheter fibrillation defibrillation episodes in 39 dogs were analyzed. Three distinct, equally distributed defibrillation patterns were observed: immediate resumption of a coordinated rhythm, thought to reflect complete depolarization of the myocardium; increasing coarsening of the fibrillation waveforms interpreted as progressive reduction in the number of fibrillating fibers with reversion when a critical mass of myocardium with synchronized activity is reached, and production of more coordinated 'flutter like' ventricular complexes probably representing a rhythm distinct from fibrillation and convertible to sinus rhythm by a second subthreshold shock. These observations suggest that total depolarization of the entire myocardium is not a prerequisite for ventricular defibrillation.

Original languageEnglish (US)
Pages (from-to)858-861
Number of pages4
JournalCirculation
Volume49
Issue number5
StatePublished - 1974

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Myocardium
Catheters
Ventricular Flutter
Shock
Electrocardiography
Electrodes
Dogs

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

Cite this

Mower, M. M., Mirowski, M., Spear, J. F., & Moore, E. N. (1974). Patterns of ventricular activity during catheter defibrillation. Circulation, 49(5), 858-861.

Patterns of ventricular activity during catheter defibrillation. / Mower, Morton Maimon; Mirowski, M.; Spear, J. F.; Moore, E. N.

In: Circulation, Vol. 49, No. 5, 1974, p. 858-861.

Research output: Contribution to journalArticle

Mower, MM, Mirowski, M, Spear, JF & Moore, EN 1974, 'Patterns of ventricular activity during catheter defibrillation', Circulation, vol. 49, no. 5, pp. 858-861.
Mower MM, Mirowski M, Spear JF, Moore EN. Patterns of ventricular activity during catheter defibrillation. Circulation. 1974;49(5):858-861.
Mower, Morton Maimon ; Mirowski, M. ; Spear, J. F. ; Moore, E. N. / Patterns of ventricular activity during catheter defibrillation. In: Circulation. 1974 ; Vol. 49, No. 5. pp. 858-861.
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