Abstract
Summary
The effect of atrial fibrillation on left atrial pressure was studied in the living dog during brief periods of ventricular standstill. The data indicate that left atrial pressure decreases with atrial fibrillation in the order of 1 mm Hg. This decrease causes a shift of the volume-pressure plot for the pulmonary-left heart segment toward the volume axis without change of slope. The mechanism of this shift is not clear.
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