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Iowa Public Television

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Duration: 02:44

Airs October 15 and 22 at 9 p.m. (ET) on PBS (check local listings)

MYSTERIOUS HUMAN Heart's one-hour episodes focuses on a different aspect of what we thought we knew, what we know now, and what we're on the verge of learning about the heart.

Endlessly Beating examines the heart as a muscle - pumping almost 100,000 times a day, pushing approximately five quarts of blood in a ceaseless circuit to deliver oxygen to every cell in the human body.

The Spark of Life looks at the physiological electrical mechanisms that keep a heart beating regularly and efficiently - and what happens when this most essential rhythm of life goes awry.

The Silent Killer focuses on atherosclerosis, the silent blockage of the coronary arteries, which can trigger a devastating and possibly fatal heart attack. As this program shows, the key is to recognize the risk factors that feed the disease and to control them before it's too late.

For more information visit www.pbs.org/heart



Post Date: October 15, 2007