Table 4. Right ventricular pressure, cavity and functional measurements that may indicate pulmonary hypertension
Pra mmHg[8]<55–10>10
TRV m·s−1[13]<2.6≥2.6
≥2.8 in obese subjects
≥2.9 in patients >60 yrs
RVSP mmHg[13]<37≥37
≥40 in obese subjects
≥44 in patients >60 yrs
RVOT acceleration time ms[8, 15, 16]>110105–110<105
RA volume index mL·m−2[8]≤34 in males and ≤27 in females>34 in males
>27 in females
RV fractional area change %[8, 21, 22]32–60≤32
LV eccentricity index[8, 44, 45]1>1 at end-diastole indicates volume loading of the RV
>1 at end-systole indicates pressure loading of the RV
RV MPI (Tei index)[8, 25–27]<0.280.28–0.32>0.32
S' wave of tricuspid annulus cm·s−1[33, 35]>1211.5–12<11.5
IVRT s[6, 8, 31, 32]<75≥75
TAPSE ms[8, 28–30]≥2016–20<16
Estimated PVR Wood units[46, 47]<11–3>3
  • Pra: right atrial pressure; TRV: tricuspid regurgitant velocity; RVSP: right ventricular systolic pressure; RVOT: right ventricular outflow tract; RA: right atrium; RV: right ventricle; LV: left ventricle; MPI: myocardial performance index; S' wave: systolic wave; IVRT: isovolumic relaxation time; TAPSE: tricuspid annular plane systolic exertion; PVR: pulmonary vascular resistance.