Related Experiment Videos
Patterns and potential value of cardiac troponin I elevations after pediatric cardiac operations
1Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA.
Insights
Postoperative cardiac troponin I (cTnI) levels after congenital heart defect repair correlate with recovery. Elevated cTnI indicates myocardial injury, serving as a prognostic indicator for recovery challenges.
Area of Science:
- Cardiology
- Pediatric Cardiac Surgery
- Biomarkers
Background:
- Perioperative myocardial injury significantly impacts postoperative cardiac dysfunction in congenital heart disease (CHD) patients.
- Assessing this myocardial injury during the perioperative period is challenging.
- Cardiac troponin I (cTnI) is a potential biomarker for myocardial injury.
Purpose of the Study:
- To evaluate the suitability of postoperative serum cTnI concentrations for assessing perioperative myocardial injury in pediatric CHD patients.
- To correlate cTnI levels with intraoperative and postoperative clinical parameters.
Main Methods:
- Serial serum cTnI levels were measured in pediatric patients undergoing surgical repair of atrial septal defect, ventricular septal defect, or tetralogy of Fallot.
- cTnI concentrations were correlated with intraoperative factors (bypass time, cross-clamp time, temperature) and postoperative outcomes (inotropic support, intubation duration, ICU/hospital stay).
Main Results:
- Postoperative cTnI levels demonstrated a lesion-specific pattern.
- Significant correlations were observed between cTnI levels (up to 72 hours post-op) and most intraoperative/postoperative parameters, excluding bypass temperature.
- Correlation strength varied by defect type, being strongest in ventricular septal defect repairs.
Conclusions:
- Postoperative cTnI levels reflect myocardial damage from surgical factors.
- Early postoperative cTnI measurements show potential as prognostic indicators for recovery in pediatric CHD patients.
Background:
Perioperative myocardial injury is a major determinant of postoperative cardiac dysfunction for congenital heart disease, but its assessment during this period is difficult. The objective of this study was to determine the suitability of using postoperative serum concentrations of cardiac troponin I (cTnI) for this purpose.
Methods:
Cardiac troponin I levels were measured serially in the serum of patients undergoing uncomplicated repairs of atrial septal defect (n = 23), ventricular septal defect (n = 16) or tetralogy of Fallot (n = 16). The concentrations were correlated with intraoperative parameters (cardiopulmonary bypass time, aortic cross-clamp time, and cardiac bypass temperature), and postoperative parameters (magnitude of inotropic support, duration of intubation, and postoperative intensive care and hospital stay).
Results:
Postoperative absolute cTnI levels were lesion specific, with a pattern of increase and decrease similar for each lesion. For the total cohort, significant correlations between postoperative cTnI levels at all times (r = 0.43 to 0.83, p < 0.05) until 72 hours were noted for all parameters, except for cardiac bypass temperature. When evaluated as individual procedure groups, no significant relationships were noted in the atrial septal defect group, whereas postoperative cTnI levels were more strongly correlated with all intraoperative and postoperative parameters in the ventricular septal defect group than in the tetralogy of Fallot group.
Conclusions:
This study suggests that cTnI values immediately after operation reflect the extent of myocardial damage from both incisional injury and intraoperative factors. Cardiac tropinin I levels in the first hours after operation for congenital heart disease are a potentially useful prognostic indicator for difficulty of recovery.