Pressure method (ESP=mPAP) | Pressure method (ESP=sRVP) | Volume method | |
---|---|---|---|
Ees | 1.38±0.88 | 1.1±0.7* | 0.37±0.33* |
Ea | 0.64±0.46 | 1.0±0.7* | 0.64±0.46 |
Ees/Ea | 2.30±0.65 | 1.4±0.88* | 0.79±0.67* |
Mean±SD values of Ees calculated as mPAP/ESV, (Pmax-mPAP)/SV, or (Pmax-sRVP)/SV, of Ea calculated as mPAP/SV or sRVP/SV. The RV-arterial coupling ratio was reduced to SV/ESV in the volume method and (Pmax/mPAP-1) or (Pmax/sRVP-1) in the pressure methods. The lowest Ees/Ea was calculated with the volume method and the highest with the pressure method (with mPAP to estimate ESP).
*p Value<0.05 compared to pressure method with ESP=mPAP.
ESP, end-systolic pressure; ESV, end-systolic volume; mPAP, mean pulmonary artery pressure; sRVP, peak systolic RV pressure; SV, stroke volume.