Cardioplegia and ventricular late potentials in cardiac surgical patients

N. Schütz, J. A. Romand, N. D. Yanez, M. M. Treggiari, K. Bendjelid

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Background and objective. Ventricular late potentials (LP) recording with signal-averaged electrocardiogram allow identifying patients at risk of sudden death and ventricular tachycardia. Cardiac surgery with cardiopulmonary bypass (CPB) could predispose to the development of myocardial ischemia related to imperfect cardioplegia. To the best of our knowledge, no study investigated the protection of cardioplegia and CPB regarding the occurrence of LP in patients without previous myocardial infarction and undergoing cardiac surgery. Methods. In 61 elective patients scheduled for cardiac surgery involving CPB, signal-averaged electrocardiogram was performed the day before and 24-48 h after the surgery. The electrodes were positioned according to Frank's orthogonal derivations. Twenty five patients were excluded because of poor quality signals, leaving 36 patients (age, 64±14) available for the analyses. An abnormal signal-averaged electrocardiogram was considered when ≥2 of the recorded indexes were present. McNemar's tests were performed on the dichotomized values to investigate differences in pre-post scores. Results. The mean CPB duration was of 110±57 min. Patients scheduled for cardiac surgery do not exhibited LP after CPB (no significant difference in pre-post CPB scores, P = NS). The probability of a patient with a negative score transitioning to a positive score was 0.23 (P = NS). Conclusions. The present study in cardiac surgical patients suggests that cardioplegia associated to CPB has no significant impact on the occurrence of LP, irrespective of surgery performed.

Original languageEnglish (US)
Pages (from-to)269-274
Number of pages6
JournalJournal of Clinical Monitoring and Computing
Volume25
Issue number4
DOIs
StatePublished - Aug 1 2011

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Keywords

  • Arrhythmias
  • Heart surgery
  • Perioperative ischemia

ASJC Scopus subject areas

  • Health Informatics
  • Critical Care and Intensive Care Medicine
  • Anesthesiology and Pain Medicine

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