Original communication
The duration of systole in hypocalcemia

https://doi.org/10.1016/S0002-8703(37)90338-7Get rights and content

Abstract

The Q-T interval of the electrocardiogram is abnormally prolonged in the presence of abnormally low blood serum calcium levels. This may be very striking, and may be of diagnostic value in the recognition of otherwise unsuspected conditions associated with hypocalcemia. The duration of mechanical systole, as measured in heart sound records, is not prolonged in hypocalcemia.

References (14)

  • E.P. Carter et al.

    The Q-T Interval in the Human Electrocardiogram in the Absence of Cardiac Disease

    Trans. Am. Soc. Clin. Invest., J. A. M. A.

    (1922)
  • P.D. White et al.

    Observations on the Effect of Various Factors on the Duration of the Electrical Systole of the Heart as Indicated by the Length of the Q-T Interval of the Electrocardiogram

    J. Clin. Investigation

    (1929)
  • M. Ballin

    Parathyroidism

    Ann. Surg.

    (1932)
  • F. Kellog et al.

    Electrocardiographic Changes in Hyperparathyroidism

    Am. Heart J.

    (1936)
  • A.H. Garrod

    On the Relative Duration of the Component Parts of the Radial Sphygmograph Trace in Health

  • J. Meakins

    Prolongation of the S-T Interval of the Ventricular Complex as Shown by the Electrocardiograph

    Arch. Int. Med.

    (1919)
  • H.C. Bazett

    An Analysis of the Time Relations of Electrocardiograms

    Heart

    (1920)
There are more references available in the full text version of this article.

Cited by (8)

  • Hypocalcemic torsades de pointes

    1989, Journal of Electrocardiology
  • Functional atrioventricular block in a preterm infant

    2001, Archives of Disease in Childhood: Fetal and Neonatal Edition
View all citing articles on Scopus

From the Department of Internal Medicine, University of Michigan Medical School, and the University Hospital.

1

This study was assisted by a grant to Dr. Frank N. Wilson from the Horace H. Rackham Endowment Fund.

View full text