Cardiac function in children with congenital adrenal hyperplasia

Area of Science:

• Pediatric Endocrinology
• Cardiovascular Physiology
• Genetics and Inherited Diseases

Background:

• Congenital adrenal hyperplasia (CAH) involves glucocorticoid imbalance and hyperandrogenism, potentially leading to cardiovascular issues.
• Failure to mimic physiological circadian rhythms in treatment can exacerbate cardiovascular risks.
• Conventional hydrocortisone therapy is standard but its long-term cardiac effects in children are not fully understood.

Purpose of the Study:

• To assess cardiac function in pediatric patients with CAH receiving conventional hydrocortisone treatment.
• To investigate the relationship between hydrocortisone dosage, therapy duration, and cardiac function in CAH.
• To compare cardiac function in pediatric CAH patients with age- and gender-matched healthy controls.

Main Methods:

• Enrolled 23 pediatric patients with CAH (ages 3-16) and 21 healthy controls.
• Utilized physical examination, electrocardiogram (ECG), conventional echocardiography, and tissue Doppler imaging (TDI).
• Analyzed systolic myocardial velocity (Sm), systolic excursion, early diastolic myocardial velocity (Em), and E/Em ratio.

Main Results:

• Pediatric CAH patients showed significantly lower mean Sm and systolic excursion compared to controls.
• Tricuspid-derived Em and E/Em ratio were significantly higher in the CAH group.
• No evidence of left ventricular hypertrophy or dilatation was observed via ECG or echocardiography.

Conclusions:

• Long-term conventional hydrocortisone therapy, even within recommended doses, may adversely affect cardiac function in children with 21-hydroxylase deficiency.
• Findings suggest a need for closer cardiac monitoring in pediatric CAH patients.
• Further research into optimized hydrocortisone regimens is warranted.