Familial hypocalciuric hypercalcemia electrocardiogram

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ajay Gade MD [2]]

Overview

The ECG findings associated familial hypocalciuric hypercalcemia are due to cardiac complications of hypercalcemia.

Electrocardiogram

There are no ECG findings associated with familial hypocalciuric hypercalcemia. However, an ECG may be helpful in the diagnosis of cardiac complications of hypercalcemia. Findings on ECG are due to hypercalcemia and includes:^[1]

ST segment – ST segment is short in patients with hypercalcemia when compared to normocalcemic patients. This represents a decrease in the systolic interval.
QRS complex – QRS complex has an increased amplitude in patients with hypercalcemia when compared to normocalcemic patients. This represents an increase in ventricular muscle mass.
T wave – T wave is prolonged in patients with hypercalcemia when compared to normocalcemic patients.

References

↑ Lind L, Ljunghall S (1994). “Serum calcium and the ECG in patients with primary hyperparathyroidism”. J Electrocardiol. 27 (2): 99–103. doi:10.1016/S0022-0736(05)80092-5. PMID 8201301.

Overview