Advanced pacemaker gets the heart in sync

Published: July, 2009

Cardiac resynchronization with a biventricular pacemaker helps reduce heart failure symptoms.

The intricately coordinated timing of the heart's beat ensures that the walls of the two lower chambers (the ventricles) contract at the same time. This two-sided muscular push squeezes out as much blood as possible from the ventricles. In many people with heart failure, though, synchrony gives way to an uncoordinated beat in the ventricles. This reduces the heart's pumping power, forcing the heart to work harder, often with harmful consequences.

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