Vitamin D Kinetics and Parathyroid Gland Function in Patients with Congenital Heart Disease.

Vitamin D deficiency and secondary hyperparathyroidism are common in patients with congenital heart diseases and heart failure. Serum parathormone and 25-hydroxyvitamin D levels correlated with several clinical heart failure markers, suggesting that vitamin D deficiency may deteriorate heart function in congenital heart disease patients.