Table 1.

Summary of echocardiographic parameters related to pulmonary hypertension diagnosis.

Parameter	Technical Aspects	Correlations with RHC	Limitations
TRVpeak	PSAX, 4Ch, or any modified view. CW doppler through TV	Proportional-moderate to high	Severe TR Assumption of Bernoulli equation
PASP	PSAX, 4Ch, or any modified view. CW doppler through TV	Moderate	Severe TR Assumption of Bernoulli equation Assumption of RAP based on the IVC (size and collapsibility, volume overload situations)—underestimation Rapid equalization of pressures between RA and RV
RVOT-AT	PSAX. May be not well-visualized	High	Arrhythmias Impaired RV function in critically ill patients
Pulmonary regurgitation	PSAX. May be not well-visualized	Low	Rare finding
RV speckle tracking	4Ch view. RV free wall may be not well-visualized	Moderate to high	Limited studies on specific populations Image quality
RA strain	4Ch view may be not well-visualized	No data	Limited studies on specific populations Image quality

4Ch: 4 chamber, CW: continuous wave, IVC: inferior vena cava, PASP: pulmonary arterial systolic pressure, PSAX: parasternal short axis, RA: right atrium, RAP: right atrium pressure, RHC: right heart catheterization, RV: right ventricle, RVOT-AT: right ventricular outflow track acceleration time, TR: tricuspid regurgitation, TRVpeak: tricuspid regurgitation velocity peak.