RR interval^at tricuspid flow measurement:Time:Pt:Heart:Qn:US
rr interval^at tricuspid flow measurement:time:pt:heart:qn:us
RR interval^at tricuspid flow measurement:Time:To identify measures at a point in time:Heart:Quantitative:Ultrasound
rr interval^at tricuspid flow measurement:time:to identify measures at a point in time:heart:quantitative:ultrasound