Comparative study of the efficacy of captopril, simvastatin, and L-carnitine as cardioprotective drugs in children with type 1 diabetes mellitus: a randomised controlled trial

Cardiol Young. 2021 Aug;31(8):1315-1322. doi: 10.1017/S1047951121000226. Epub 2021 Feb 4.


Objectives: To assess the efficacy and safety of captopril, simvastatin, and L-carnitine as cardioprotective drugs in children with type 1 diabetes mellitus on different echocardiographic parameters, electrocardiographic parameter, lipid profile, and carotid intima-media thickness.

Methods: This randomised controlled trial was conducted on 100 children with type 1 diabetes mellitus for more than 3 years during the period from September 2018 to June 2020. Fifty healthy children of matched age and sex served as a control group. The patients were randomly assigned into four groups (25 children each): no-treatment group who received no cardioprotective drug, simvastatin group who received simvastatin (10-20 mg/day), captopril group who received captopril (0.2 mg/kg/day), and L-carnitine group who received L-carnitine (50 mg/kg/day) for 4 months. Lipid profile, serum troponin I, carotid intima-media thickness, and echocardiographic examinations were performed on all included children before and after the treatment.

Results: Total cholesterol and low-density lipoprotein were significantly decreased in children who received simvastatin or L-carnitine. Triglycerides significantly decreased only in children who received simvastatin. High-density lipoprotein significantly increased in simvastatin and L-carnitine groups only. Serum troponin I decreased significantly in all the three treatment groups. Carotid intima-media thickness showed no significant change in all treatment groups. Echocardiographic parameters significantly improved in simvastatin, L-carnitine, and captopril groups.

Conclusion: Captopril, simvastatin, and L-carnitine have a significant beneficial effect on cardiac functions in children with type 1 diabetes mellitus. However, only simvastatin and L-carnitine have a beneficial effect on the lipid profile. The drugs were safe and well tolerated.Clinical trial registration: The clinical trial was registered at (NCT03660293).

Keywords: 3D-STE; Children; asymptomatic cardiac dysfunction; cardioprotective drugs; lipid profile; type 1 diabetes mellitus.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Captopril
  • Carnitine
  • Carotid Intima-Media Thickness
  • Child
  • Diabetes Mellitus, Type 1* / drug therapy
  • Humans
  • Pharmaceutical Preparations*
  • Simvastatin / therapeutic use


  • Pharmaceutical Preparations
  • Captopril
  • Simvastatin
  • Carnitine

Associated data