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Table 1 Definitions of terms used in this article

From: Pulmonary vascular dysfunction in ARDS

Terms Definition
Pulmonary hypertension (PH) Mean pulmonary artery pressure (mPAP) >25 mmHg
Moderate PH - mPAP between 30 and 45 mmHg
Severe PH - mPAP > 45 mmHg [6],[7]
Pulmonary vascular resistance (PVR) mPAP-PAOP/cardiac output
Pulmonary vascular resistance index mPAP-PAOP/cardiac index
Pulmonary vascular dysfunction (PVD) Abnormal elevations in PVR identified by measurement of either transpulmonary gradient (mPAP-PAOP) and/or pulmonary vascular resistance index (mPAP-PAOP/cardiac index) [5]
Right ventricular dysfunction (RVD) Pulmonary artery catheter-based definitions:
(i) RVD = CVP > PAOP and MPAP > 25 mmHg and SVI < 30 ml m−2, or
(ii) RAP > PAOP
Acute cor pulmonale (defined by echo) Ratio of RV to LV end-diastolic area >0.6 with interventricular septal flattening at end-systole