Levosimendan in congenital cardiac surgery: a randomized, double-blind clinical trial.

OBJECTIVE: In this study, the authors used a continuous infusion of either levosimendan or milrinone as inotropic support after corrective congenital cardiac surgery. The hemodynamic and biochemical parameters were compared. DESIGN: A prospective, randomized, double-blind clinical study. SETTING: A university hospital. PARTICIPANTS: Forty-one patients between 0 and 5 years old requiring inotropic support for corrective congenital heart surgery under cardiopulmonary bypass (CPB) were enrolled in this trial. Thirty-six patients completed the study. INTERVENTIONS: Patients were randomized in a double-blind fashion to a continuous infusion of either levosimendan at 0.05 µg/kg/min or milrinone at 0.4 µg/kg/min started at the onset of CPB. Epinephrine was started at 0.02 µg/kg/min after aortic cross-clamp release in both groups. MEASUREMENTS AND MAIN RESULTS: There was no significant difference between serum lactate levels of groups. The rate-pressure index (the product of heart rate and systolic blood pressure), which is an indicator of myocardial oxygen demand, was significantly lower at 24 hours and 48 hours postoperatively in the levosimendan group (p < 0.001) in comparison to the milrinone group. Although not significantly different, the troponin values in the levosimendan group were less at 1 hour (median [P(25)-P(75)]: 20.7 [15.3- 48.3] v 34.6 [23.8- 64.5] ng/mL and 4 hours postoperatively: 30.4 [17.3-59.9] v 33.3 [25.5-76.7] ng/mL). CONCLUSION: Levosimendan is at least as efficacious as milrinone after corrective congenital cardiac surgery in neonates and infants.

Role of congenital long-QT syndrome in unexplained sudden infant death: proposal for an electrocardiographic screening in relatives.

INTRODUCTION: Congenital long-QT syndrome (LQTS) is a sporadic or familial inherited arrhythmia. It can lead to sudden death by ventricular fibrillation which occurs at any age but particularly during infancy. Recent studies of postmortem molecular analysis in infants who died of unexplained sudden infant death syndrome (SIDS) showed abnormal mutations to LQTS in 10% to 12%. Current methods of etiologic investigation of sudden infant death syndrome do not allow the diagnosis of LQTS. A targeted anamnesis together with systematic electrocardiograms of first- and second-degree relatives could be an efficient LQTS diagnostic tool. Therefore, we propose to include them in screening procedures for SIDS etiologies. CONCLUSION: LQTS accounts for a significant number of unexplained SIDS. We suggest adding a systematic familial electrocardiographic screening to the current etiologic investigations in order to track congenital LQTS in relatives.