P WAVE DURATION AND P-R INTERVAL DURING FIRST WEEK OF LIFE
Open Access
- 1 January 1963
- Vol. 25 (1) , 42-46
- https://doi.org/10.1136/hrt.25.1.42
Abstract
ECGs were taken on 68 healthy newborn infants on their first, second, third, and fifth or sixth day of life. P wave duration was not influenced by heart rate at any time during the first week of life. The P-R interval was related to the heart rate in infants only one hour old or less, but not subsequently. Significant prolongation of P wave duration and the P-R interval was encountered mainly in infants one hour old, or less, and possible mechanisms are discussed.Keywords
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