Table 1 Echocardiographic criteria corresponding to various levels of likelihood of pulmonary hypertension (PH)

Peak tricuspid jet velocity m·s⁻¹	Estimated P_pa,syst^# mmHg	Other echo signs of PH present	PH (grade of evidence) [1]
≤2.8	≤36	No	Unlikely (I-B)
≤2.8	≤36	Yes	Possible (IIa-C)
2.9–3.4	37–50	No	Possible (IIa-C)
>3.4	>50	Yes/no	Likely (I-B)

^#: echo-Doppler estimate of systolic pulmonary arterial pressure (P_pa,syst) based on tricuspid jet method (right atrial pressure assumed to be 5 mmHg).