ImportantBed

Saturday, April 24, 2004

Cardiovascular Disease, Cardiac pacemakers

The normal rhythm of the heart is generated by spontaneous electrical activity in cells in an area of the heart called the sinoatrial node. The electrical activity is usually at a rate of about 70 beats per minute at rest and is transmitted to the pumping chambers of the heart, the atria, and the ventricles through a specialized conducting system. The electrical activity

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