0 a device that opens and closes to control the flow of liquids or gases, or a similar structure in the heart and the veins that controls the flow of blood -- 閥；活門；（心臟或血管的）瓣膜
In life the tellin would have had two valves, but only one is preserved here.
The single valves are preserved in a fine-grained limestone.
There was no neonate with regurgitation involving four valves.
Bioprosthetic valves have a strong tendency to calcify in children.
At this stage, the wider curved end of the baffle is brought down onto the remnant of the atrial septum between the atrioventricular valves.
Abnormalities of the coronary circulation were not apparent grossly in the specimens with hypertrophied right ventricular myocardium and imperforate pulmonary valves.
Five patients (63%) among those without carditis had abnormal findings of their mitral valves.
Failures of prosthetic valves caused the largest number ofreinterventions.
