Heart valve disease is the third most common cause of heartproblems in the United States. The heart circulates blood throughthe lungs, where it is oxygenated and then pumped out to therest of the body. Heart valves maintain the forward flow of bloodacross the heart and through the circulatory system. Heart valvedisease occurs when one or more of the valves … [Lees meer...] overSTATISTIEKEN UIT USA