adjective: of or relating to a systole or happening during a systole
noun: the contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery

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Keely
"Macvicar foreshadowed the teachings of this new philosophy when he wrote, "All motion in the universe is rhythmical. This is seen in the forward and backward movement of the pendulum, the ebb and the flow of the tides, the succession of day and night, the systolic and diasystolic action of the heart, and in the inspiration and expiration of the lungs. Our breathing is a double motion of the universal ether, an active and a reactive movement. This androgyne principle, with its dual motion, is the breath of God in man. The writings of the ancients teem with these ideas, which have been handed down to us from generation to generation, and are now flashing their light, like torches in the darkness, upon mysteries too long regarded as "lying outside the domain of physical science." [Bloomfield-Moore, see Father-Mother Principle, Neutral Center]