Echocardiographic probability of pulmonary hypertension

Table A: Echocardiographic probability of pulmonary hypertension in symptomatic patients with a suspicion of pulmonary hypertension
Peak tricuspid regurgitation velocity (m/s)	Presence of other echo "PH signs"*	Echocardiographic probability of pulmonary hypertension
≤2.8 or not measurable	No	Low
≤2.8 or not measurable	Yes	Intermediate
2.9 to 3.4	No	Intermediate
2.9 to 3.4	Yes	High
>3.4	Not required	High

Table B: Echocardiographic signs suggesting pulmonary hypertension used to assess the probability of pulmonary hypertension in addition to tricuspid regurgitation velocity measurement in Table A
A: The ventricles^¶	B: Pulmonary artery^¶	C: Inferior vena cava and right atrium^¶
Right ventricle/left ventricle basal diameter ratio >1.0	Right ventricular outflow Doppler acceleration time <105 msec and/or midsystolic notching	Inferior cava diameter >21 mm with decreased inspiratory collapse (<50% with a sniff or <20% with quiet inspiration)
Flattening of the interventricular septum (left ventricular eccentricity index >1.1 in systole and/or diastole)	Early diastolic pulmonary regurgitation velocity >2.2 m/sec	Right atrial area (end-systole) >18 cm²
	PA diameter >25 mm

PH: pulmonary hypertension; PA: pulmonary artery.
* Refer to Table B.
¶ Echocardiographic signs from at least two different categories (A/B/C) from the list should be present to alter the level of echocardiographic probability of pulmonary hypertension.

Reproduced with permission of the © 2019 European Society of Cardiology & European Respiratory Society. European Respiratory Journal 46 (4) 903-975; DOI: 10.1183/13993003.01032-2015. Published 30 September 2015.

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