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The valve
The valve between the heart and the aorta is the aortic valve, and the valve between the heart and the pulmonary artery is the pulmonic valve.
There are four valves in the heart--the aortic valve, pulmonary valve, mitral valve, and tricuspid valve--each at the exit of one of the heart's four chambers.
heart
Mitral valve
Heart valve replacement is a surgical procedure during which surgeons remove a damaged valve from the heart and substitute a healthy one.
Generally healthy but are prone to mitral valve heart disease: a deterioration in one of the four sets of mitral valve's in a dog's heart. When it strikes, the mitral valve atrophes. The valve doesn't fully close after each pumping action, allowing blood to float backwards from the ventrical into the adrium. This can lead to valve collapse and ultimatley, heart failure.
pulse is caused by the dilation and recoiling of your artery as blood gushes through (one sound). heartbeat is closing of the heart valves (2 sounds). The 2 sounds are caused by the atrioventricular valve ("lub") and the semilunar valve ("dub")
Abnormal heart sounds called murmurs are usually a result of faulty valves. For example, an incompetent valve fails to close tightly, so that blood leaks through the valve when it is closed. Another example, an incompetent bicuspid valve produces a swishing sound immediately after the first heart sound.
The sound coming from your heart is the sound of the valves in the heart closing and the turbulence in the blood that results. In a normal healthy adult the first sound (or lub) is from the closing of the AV valve and the second sound (or dub) is from the closing of the semilunar valve.
bicuspid valve, also called the mitral valve
Acute dyspnea can be caused by disturbances of the heart rhythm, failure of the left ventricle, mitral valve (a heart valve) dysfunction, or an embolus (a clump of tissue, fat, or gas) that is blocking the pulmonary circulation
Echocardiograms (ultrasounds of the heart) have gotten so sensitive that they often identify small things that are of no consequence. This is one of them. It is possible that it is causing a murmur that the doctor can hear but otherwise it is of no consequence. It should not cause symptoms or future heart problems. It should not be a reason to restrict sports participation and it does not require antibiotics before dental procedures. The Mitral valve is the valve between the top chamber of the left heart (the atria) and the large chamber (the ventricle) that squeezes the blood out to the body which can be felt as the pulse. Regurgitation means that some of the blood is leaking backward across the valve. The fact that it is described as trivial means that it is a very small amount that should not cause problems.
aortic regurgitation
The valve
Mitral Valve
The valve between the heart and the aorta is the aortic valve, and the valve between the heart and the pulmonary artery is the pulmonic valve.