Mitral valve repair available in Europe but still in clinical trial in the United States. It is a highly specialized technique only available at select hospitals. Early trial results suggest that it may be a beneficial approach for patients who are at high risk from conventional surgery. As early as January 2000 a team of doctors at the "Instituto de Cardiología y Cirugía Cardiovascular" in La Habana, Cuba have performed beating heart mitral valve repair or replacement. The beating heart mitral valve replacement technique is as safe as the arrested heart technique, and is the recommended alternative to arrested heart technique. The analogy
Mitral insufficiency broad, notched P waves in several or many leads with a prominent late negative component to the P wave in lead V, and may be seen in MI, but also in mitral stenosis, and, potentially, any cause of overload of the left atrium. Thus, "P-sinistrocardiale" may be a more appropriate term. The degree of severity of MR can be quantified by the regurgitant fraction, which is the percentage of the left ventricular stroke volume that regurgitates into the left atrium. where V and V are, respectively, the volumes of blood that flow forward through the mitral valve and aortic valve