Common questions.
What does my doctor actually hear when she listens to my heart through a stethoscope ?
If you put your ear to another person's chest, you can hear the sound of his heart beating - lubb-dup, lubb-dup - two sounds for every heartbeat. The first sound is caused by the valves between the upper chambers (atria) and the lower chambers (ventricles) snapping shut, the second by the closing of the valves between the lower chambers and the major arteries. With a stethoscope, your doctor can hear these normal heart sounds more clearly and can also detect a rich repertoire of other sounds: snaps, clicks, knocks, murmurs, gallops, rubs. Some are innocuous, while others indicate significant heart disease.
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