Do the Human Ventricles Eject Simultaneously?

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Abstract
In a series of 10 patients, simultaneous recordings were made of right ventricular and brachial artery pressures, the ballistocardiogram, and the carotid artery surface pulse. Evidence is presented that ejection from the right and left ventricles does not start simultaneously in the human, the interval between ejections being of the order of 30-50 msec. The I-wave of the ballistocardiogram seemingly dates to the start of ejection from the right heart, and is not initiated by left ventricle ejection which must have started earlier.