Page 79 - Assessing right ventricular function and the pulmonary circulation in pulmonary hypertension Onno Anthonius Spruijt

Figure 1: Assessment of the relative longitudinal and transverse wall motion. A = end-diastole; B = end-systole. The relative longitudinal wall motion was assessed by measuring the distance between the annulus of the tricuspid valve and the apex at end- diastole and end-systole. The relative transversal wall motion was assessed at 50% and perpendicular to the longitudinal distance at end-diastole and end-systole.
Fractional longitudinal wall motion (FLWM) and fractional transverse wall motion (FTWM)
FLWM and FTWM were not previously studied by echo, but showed reasonable correlations with RVEF in a recent CMRI study [15]. FLWM was determined from an apical four-chamber view by measuring the distance between the tricuspid annulus and apex at end-diastole and end-systole (figure 1). FLWM was than calculated as:
FTWM was determined from an apical four-chamber view. First a line was drawn from the tricuspid annulus to the apex. Halfway through and perpendicular to this line, the transverse distance between the RV endocardium and interventricular septum was drawn at end-diastole and end- systole (figure 1). Subsequently, FTWM was calculated as:
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