A4. Pulmonary artery acceleration time (PAAT)
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PSX view, PV위치를 잡고, PV 위치에서 도플러 측정
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≤ 60-80 msec suggests acute right ventricular dysfunction
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< 105 msec suggests chronic right ventricular dysfunction
Image 6. (a, b, c, d, and e): Pulmonary artery systolic ejection waveforms.
