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March 1985Volume 3, Issue 2, Pages 104–107
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Low-energy defibrillation: Safe and effective☆☆☆

Carol L. Lake
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Carol L. Lake
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA

Correspondence

  • Address reprint requests to Dr. Lake: Box 238, Department of Anesthesiology, University of Virginia Medical Center, Charlottesville, VA 22908.
, MDcorrespondence
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Carol L. Lake
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA

Correspondence

  • Address reprint requests to Dr. Lake: Box 238, Department of Anesthesiology, University of Virginia Medical Center, Charlottesville, VA 22908.
,
T.Duncan Sellers
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T.Duncan Sellers
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA
, MD
,
Stanton P. Nolan
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Stanton P. Nolan
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA
, MD
,
Ivan K. Crosby
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Ivan K. Crosby
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA
, MD
,
H.A. Wellons
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H.A. Wellons
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA
, MD
,
Richard S. Crampton
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Richard S. Crampton
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Affiliations

  • Department of Anesthesiology, Internal Medicine (Cardiology), University of Virginia Medical Center, Charlottesville, Virginia, USA
  • Department of Surgery (Thoracic and Cardiovascular), University of Virginia Medical Center, Charlottesville, Virginia, USA
, MD
DOI: http://dx.doi.org/10.1016/0735-6757(85)90030-0
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Abstract

During cardiopulmonary bypass, 150 cardiac surgical patients were prospectively evaluated for the number, energy, current, and success rates of direct current (DC) shocks required to terminate reperfusion ventricular fibrillation (1°) or ventricular fibrillation occurring subsequent to a nonfibrillatory reperfusion rhythm (2°). Thirty-one percent of 1-J shocks and 58% of 2.5-J shocks defibrillated. Above 2.5 J, the defibrillation success rate reached a plateau of 50–60%. Myocardial resistance decreased significantly after the first shock but remained stable during subsequent shocks. Lower defibrillating currents and myocardial resistances than had been previously reported were observed. The feasibility of low-energy defibrillation during cardiopulmonary bypass was therefore documented.

Keywords:

Cardiac arrhythmias, fibrillation, low-energy defibrillation, ventricular defibrillation

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☆Supported by NIH grant no. 25919 and by Physio Control Corporation, Redmond, Washington.

☆☆Presented in part at the Fifth Purdue Conference on CPR and Defibrillation, West Lafayette, Indiana, September 25–26, 1984, and at the International Anesthesia Research Society meeting, New Orleans, Louisiana, March 15, 1983.

© 1985 Published by Elsevier Inc.
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March 1985Volume 3, Issue 2, Pages 104–107