Palpation may show thrill (vibration) over the heart. A stethoscope may reveal a distinctive murmur in the heart. However, this murmur may be absent in some cases of acute mitral regurgitation. If fluid backs up into the lungs, there may be crackles heard in the lungs. An extra heart sound (S4 gallop) may also be heard.
Blood pressure is usually normal.
The following tests may be performed: