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Corrected QT interval (QTc) prolongation and syncope associated with pseudohypoparathyroidism and hypocalcemia
T C Huang1, F C Cecchin, P Mahoney
1Divisions of Cardiology and Endocrinology, and the Department of Pediatrics, University of Washington and Children's Hospital and Regional Medical Center, Seattle, WA 98105-0371, USA.
The Journal of Pediatrics
|March 4, 2000
Abstract:
An adolescent presented with exercise-associated syncope and electrocardiographic corrected QT interval (QTc) prolongation. Pseudohypoparathyroidism-induced hypocalcemia was diagnosed. The QTc (485 to 505 milliseconds) shortened during normalization of calcium levels, and syncope has not reoccurred.