the priming force contributed by atrial contraction immediately before ventricular systole that acts to increase the efficiency of ventricular ejection due to acutely increased preload.
Farlex Partner Medical Dictionary © Farlex 2012
atrial kickAtrial systole Cardiology The contraction of the atrium, which accounts for 5-30% of cardiac output; it appears as an abrupt notch in the pressure curve in the ventricular outflow tract, and is typical of hypertrophic cardiomyopathy–formerly idiopathic hypertrophic subaortic stenosis
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.