Pre ejection time:Time:Pt:Heart.ventricle.right:Qn:US.doppler+ECG
pre ejection time:time:pt:heart.ventricle.right:qn:us.doppler+ecg
Pre ejection time:Time:Pt:Heart.ventricle.right:Qn:US.doppler+ECG
pre ejection time:time:pt:heart.ventricle.right:qn:us.doppler+ecg