A wave duration.pulmonary vein/A wave duration.mitral valve:TRto:Pt:Circulatory system:Qn:US
a wave duration.pulmonary vein/a wave duration.mitral valve:trto:pt:circulatory system:qn:us
Circ sys Pulm v A dur/MV A dur US
circ sys pulm v a dur/mv a dur us