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Age-dependent and hypoxia-related differences in myocardial protection during pediatric open heart surgery

H Imura1, M Caputo, A Parry

  • 1Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, UK.

Circulation
|March 21, 2001
PubMed

Insights

Pediatric cardiac surgery using cold-crystalloid cardioplegia shows age and cyanosis impact myocardial protection. Children experience better outcomes than infants, and cyanosis worsens results in children.

Area of Science:

  • Cardiology
  • Pediatric Cardiac Surgery
  • Cardiothoracic Surgery

Background:

  • Current pediatric cardiac surgery cardioplegia lacks age and cyanosis considerations.
  • Cold-crystalloid cardioplegia is a common protection method.

Purpose of the Study:

  • To evaluate clinical outcomes, myocardial metabolism, and reperfusion injury in pediatric patients receiving cold-crystalloid cardioplegia.
  • To investigate the influence of age and cyanosis on myocardial protection.

Main Methods:

  • Studied 58 pediatric patients (children and infants) undergoing open heart surgery.
  • Assessed clinical outcomes (support, ICU/hospital stay), myocardial metabolism (ventricular biopsies), and reperfusion injury (troponin I).

Main Results:

  • Ischemic stress observed in both children and infants, indicated by metabolic changes.
  • Children showed less reperfusion injury and better clinical outcomes than infants, linked to ischemic time.
  • Cyanosis negatively impacted outcomes and reperfusion injury in children, but not in infants.

Conclusions:

  • Myocardial protection with cold-crystalloid cardioplegia in pediatric cardiac surgery is influenced by patient age.
  • The degree of cyanosis significantly affects outcomes and reperfusion injury in pediatric patients.
Abstract

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