Signs and symptoms of mitral valve prolapse are due to the amount of blood leaking backward through the valve. Mitral valve prolapse symptoms can vary widely from one person to another. Many people with mitral valve prolapse don't have noticeable symptoms. Other people may have mild symptoms that develop gradually. Symptoms of mitral valve prolapse may include:  A racing or irregular heartbeat (arrhythmia) Dizziness or lightheadedness Difficulty breathing or shortness of breath, especially during exercise or when lying flat Fatigue 
signs symptoms mitral valve prolapse due amount blood leaking backward valve  mitral valve prolapse symptoms can vary widely person another  people mitral valve prolapse don't noticeable symptoms  people may mild symptoms develop gradually  symptoms mitral valve prolapse may include:  racing irregular heartbeat (arrhythmia) dizziness lightheadedness difficulty breathing shortness breath  especially exercise lying flat fatigue 
mitral valve prolapse