Why the study?
Does increased heart rate via right atrial pacing increase the active contribution of atrial systole to left ventricular filling in normal human subjects?
Does increased heart rate via right atrial pacing increase the active contribution of atrial systole to left ventricular filling in normal human subjects?
The active contribution of atrial systole to left ventricular filling does not increase during tachycardia, challenging the common belief that atrial pump function increases with heart rate.
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Questions presumed atrial systole augmentation at higher rates; hypothesis-generating for diastolic filling in clinical tachycardia.
Iliceto et al. (1991) studied this question.
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