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Мерцательная аритмия.

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Описание материала:

The normal heartbeat begins with electrical impulses from the sinoatrial, or SA node, a group of specialized pacemaker cells in the right atrium. These impulses cause the atria to contract and push blood into the ventricles. The impulse travels down to a junction called atrioventricular, or AV node, it then moves to the ventricles, which contract and pump blood out to the lungs and the rest of the body.In people with atrial fibrillation, a chaotic electrical signal in the upper part of the heart produces a change in the heart rhythm. The atrial muscles quiver, electrical signals to the lower chambers of the heart are irregular, so that the heartbeat can be fast and irregular, and the heart may have more trouble pumping efficiently.

Язык: Русский
Длительность материала: 00:00:51
Автор: qPanadol