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January 1, 1956CirculationOpen Access

Electrocardiographic Changes During Hypothermia and Circulatory Occlusion

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Why the study?

What are the electrocardiographic changes associated with hypothermia and circulatory occlusion?

Population

25 patients undergoing reduction of body temperature (hypothermia) and total occlusion of circulation

Design

Case_series

Authors

CHCLARENCE E. HICKSUniversity of Colorado DenverMMMalcolm C. McCordMay InstituteSBS.Gilbert BlountOklahoma City University

Discussion

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Overview

Reversible ECG changes arise with hypothermia and occlusion; Level 5 data leave open relevance to current perioperative care.

Key Points

  • To assess the electrophysiological and electrocardiographic modifications that occur during induced hypothermia and complete circulatory occlusion.
  • Analyzed serial electrocardiographic tracings from 25 patients undergoing body cooling and total circulatory arrest.
  • Hypothermia induced heart rate deceleration, impaired intracardiac conduction, and impaired normal impulse formation resulting in atrial arrhythmias.
  • Total circulatory occlusion during hypothermia caused a high incidence of ventricular arrhythmias.
  • Myocardial electrical disturbances resolved and returned toward baseline following the release of circulatory occlusion and patient rewarming.

Structured PICO

What are the electrocardiographic changes associated with hypothermia and circulatory occlusion?

P
Population
25 patients undergoing reduction of body temperature (hypothermia) and total occlusion of circulation
I
Intervention
Reduction of body temperature (hypothermia) and total occlusion of circulation
O
Outcome
Electrocardiographic changes (abnormalities in conduction and rhythmicity)surrogate

Hypothermia and circulatory occlusion induce significant but reversible electrocardiographic abnormalities, including atrial and ventricular arrhythmias.

Cite This Study

HICKS et al. (1956) studied this question.

synapsesocial.com/papers/6a813428d7cc36764366156ehttps://doi.org/10.1161/01.cir.13.1.21
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