The Q-T Interval in Normal Infants and Children
- 1 June 1950
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 1 (6), 1329-1337
- https://doi.org/10.1161/01.cir.1.6.1329
Abstract
Because of renewed clinical interest in the Q-T interval and because of a need of normal values for an accompanying investigation in rheumatic fever, the Q-T was studied in 517 normal infants and children from birth to 13 years of age. A mean K of 0.404 for Bazett's formula and of 0.378 for Ashman and Hull's formula was obtained. With Bazett's curve approximating the data more closely, a Bazett's scattergram of the normal Q-T at varying heart rates was constructed. Although no difference in K value was noted between the sexes, significant differences were observed in certain age groups.Keywords
This publication has 26 references indexed in Scilit:
- ELECTROCARDIOGRAPHIC STUDIES IN CRETINSHeart, 1949
- Electrocardiographic changes in acute glomerulonephritisAmerican Heart Journal, 1946
- The duration of ventricular systole as measured by the Q-T interval of the electrocardiogram, with especial reference to cardiac enlargement with and without congestive failureAmerican Heart Journal, 1943
- The duration of systole in hypocalcemiaAmerican Heart Journal, 1937
- The electrocardiogram during and after emergence from diabetic comaAmerican Heart Journal, 1937
- Elektrokardiographische Untersuchungen an Spasmophilen KindernKlinische Wochenschrift, 1935
- STUDIES ON THE ELECTRICAL SYSTOLE (“Q-T” INTERVAL) OF THE HEARTJournal of Clinical Investigation, 1932
- Observations on the duration of the electrical systole of the heart, with special reference to the effect of digitalisAmerican Heart Journal, 1931
- Duration of Electrical Systole ("Q-T" Interval) in Cardiac Failure.Experimental Biology and Medicine, 1930
- CHANGES IN HEART-RATE, BLOOD-PRESSURE, AND DURATION OF SYSTOLE RESULTING FROM BICYCLINGAmerican Journal of Physiology-Legacy Content, 1904