Key result
Fluoro-cardiography and simultaneous pulse tracing revealed that contraction of the right auricle and ventricle preceded that of the left chambers by 25 to 30 milliseconds.
Observational (n=8)
Effect estimate: 25-30 ms delay
This physiological study demonstrates that in normal human hearts, the contraction of the right atrium and ventricle precedes that of the left by 25 to 30 milliseconds.
Defines normal right-to-left contraction sequence; leaves open relevance to modern dyssynchrony assessment.
The temporal relation between the contractions of the left and right heart chambers was studied by means of fluoro-cardiography and simultaneous recording of 2 pulse tracings on one strip. The study was performed on 8 normal subjects and included the observation of the pulsations of the aorta and the pulmonary artery, both auricles and both ventricles. In all observations the contraction of the right auricle preceded that of the left auricle and the contraction of the right ventricle that of the left. The delay of action of the left chambers was found to be between 25 and 30 milliseconds.
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Luisada et al. (1947) conducted an observational in Healthy (n=8). Fluoro-cardiography and simultaneous pulse tracing was evaluated on Temporal relation between contractions of the left and right heart chambers (25-30 ms delay). Fluoro-cardiography and simultaneous pulse tracing revealed that contraction of the right auricle and ventricle preceded that of the left chambers by 25 to 30 milliseconds.
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