Prolongation of ventricular depolarization and repolarization in patients with cardiac surgery

Authors

  • Marcelo V. Puga Bravo
  • Yisel Gallardo Medina
  • Jesús A. Castro Hevia

Abstract

Introduction: Cardiac surgery involves a series of aggressive mechanical and chemical elements that affect the cardiac muscle; which may be shown by the electrocardiogram.

Objectives: To evaluate whether electrocardiographic measurements reflecting ventricular depolarization and repolarization are prolonged after cardiac surgery.

Method: We studied 51 patients with cardiac surgery who underwent an electrocardiogram before and after surgery. The difference between QT, QTc, QT dispersion, TPEAK-TEND interval (TP-TE), TP-TE dispersion and QRS duration, before and after surgery was compared using the T test.

Results: Electrocardiogram after surgery showed significantly higher QTc values, QT dispersion, TP-TE, TP-TE dispersion and QRS duration (p<0.006). The uncorrected QT interval was greater in the postoperative electrocardiogram, without statistically significant difference (p=0.49).

Conclusions: Myocardial aggression during cardiac surgery modifies the ventricular electrical activity and is verified by the significantly prolonged depolarization and repolarization measurements. These variables could be used in future studies as predictors of adverse events in this procedure.

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Published

2018-10-10

How to Cite

1.
Puga Bravo MV, Gallardo Medina Y, Castro Hevia JA. Prolongation of ventricular depolarization and repolarization in patients with cardiac surgery. CorSalud [Internet]. 2018 Oct. 10 [cited 2025 Jun. 30];10(4):320-5. Available from: https://revcorsalud.sld.cu/index.php/cors/article/view/402

Issue

Vol. 10 No. 4 (2018)

Section

BRIEF ARTICLES

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