A heart murmur caused by valve stiffness is fairly common in older people. The valves inside the heart, which control the direction of blood flow, thicken and become stiffer. The heart muscle cells degenerate slightly. ![]() Normal changes in the heart include deposits of the "aging pigment," lipofuscin.They may be caused by several types of heart disease. ![]() Abnormal rhythms ( arrhythmias), such as atrial fibrillation, are more common in older people.
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