Figure 1. Measurement of TAPSE(A) and TAPSE-t from color-coded M-mode image of the RV free wall in RV-focused view

As we could not directly measure the TAPSE slope with our echocardiography machine, TAPSE and TAPSE-t were measured from color-coded M-mode tracing of the lateral tricuspid annulus. Then TAPSE-slope (cm/sec) was calculated based on the following formula: