Open AccessThe QT interval in clinical hypercalcemia
Author(s) -
Wortsman J.,
Frank S.
Publication year - 1981
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960040205
Subject(s) - medicine , qt interval , interval (graph theory) , cardiology , electrocardiography , combinatorics , mathematics
Corrected QT intervals were determined in 13 patients with severe, chronic hypercalcemia. The Q O T C interval was short in only 2 of 14 instances; Q A T C in 5 of 15 instances, and Q E T C in 5 of 16 instances. The correlations between serum calcium and the QT C measurement were not significant when evaluating either linear or curvilinear (quadratic) relationships. Small and inconsistent changes were found when comparing the QT intervals before the development of the hypercalcemic episode, during hypercalcemia, or after successful treatment. We conclude that shortening of the QT interval is an unreliable index of clinical (chronic) hypercalcemia.