"There are few accurate ways to predict the seriousness of a single case, and these methods require fairly sophisticated and expensive imaging. Our study shows that exercise tolerance testing, a simple procedure often performed in doctors' offices, is an excellent tool for predicting if the patient is deteriorating and needs surgery," says Dr. Jeffrey S. Borer, professor of cardiovascular medicine in cardiothoracic surgery at Weill Cornell Medical College. In mitral regurgitation, the mitral valve does not close completely, as it should, when the heart contracts, allowing blood to flow backward instead of forward, limiting blood flow to the body. Symptoms include shortness of breath, fatigue, cough, heart palpitations, swollen feet or ankles, and excessive urination. A characteristic heart murmur can be heard with a stethoscope.
Developed in its most simple form in the 1920s, exercise tolerance testing (ETT) is used commonly to assess the progression of coronary artery disease and the severity of aortic stenosis. In the current study, researchers followed 38 patients with chronic severe nonischemic MR (that is, MR not due to a prior heart attack) for an average of seven years. All underwent ETT at study entry. Patients who could continue exercising for 15 minutes or longer (of a maximum total of 18 minutes) had a fivefold lower annual risk of developing heart failure or other evidence of severe heart dysfunction necessitating surgery, compared to patients who were unable to exercise for that length of time. In patients with chronic severe nonischemic MR, progression to surgical indications generally is rapid. There are two surgical options for the treatment of MR: mitral valve replacement and mitral valve repair.
MEDICA.de; Source: Cornell University