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Trans-thoracic and trans-esophageal echocardiogram revealed severe mitral regurgitation due to prolapse of the anterior mitral valve leaflet (AMVL), and a posteriorly directed regurgitant jet into the severely dilated left atrium was noted.
We found that the muscle in the left atrium produces more alpha protein during hibernation, which results in a slightly weaker beat," said Rourke, adding "the lower force keeps the atrium from being damaged as it pushes against the stiffer ventricle.
Physicians believe this increased risk is associated with the failure of the left atrium to fully evacuate blood from the atrium during atrial fibrillation.
The BioSTAR(R) sits on both the right and left atrium of the heart, effectively closing the hole between the heart chambers.
[Editor's note: This is the backward leaking of blood in the heart from the left ventricle (lower chamber) to the left atrium (upper chamber).
The now oxygen rich blood travels into the pulmonary vein (this is the only vein in the body to carry oxygenated blood) and then goes into the left atrium.
But during recent bypass surgery surgeons discovered scars from an entrance wound on the heart's left atrium and an exit wound on the right atrium.
He attributed a case of left vocal fold immobility to compression of the recurrent laryngeal nerve by a dilated left atrium in a patient with mitral valve stenosis.