Objectives: To describe clinical characteristics and hs-Troponin I levels in pediatric patients with congenital heart disease. To determine some correlations between hs-Troponin I levels and the severity of the disease. Methods: The Cross-sectional descriptive study of 51 patients with congenital heart disease identified based on color Doppler echocardiography, hospitalized at Pediatric center of Hue central Hospital from April 1, 2016 to June 30, 2017. Results: The most common symptom was sweating (52,9%). For clinical signs, tachypnea and heart murmur >
3/6 accounted for the highest rate (72.5% and 76.5%). For complications: pulmonary arterial hypertension and heart failure were the highest eqully (70.6%), malnutrition (68.6%) and pneumonia (64.7%). The in creased concentration of hs-Troponin I accounted for 57,7% of total patients. There was a statistically significant correlation between the increase in hs-troponin I level and the severity of pulmonary arterial hypertension, heart failure, and pneumonia. Conclusion: The clinical features of congenital heart diseases are often manifested by the complications. There was a statistically significant correlation between the increase in hs-troponin I level and the severity of common complications.