TAPSE provides a rough estimate of RV function by measuring the longitudinal shortening of the right ventricle. TAPSE is traditionally measured by placing the M-mode cursor at the lateral tricuspid annulus from the apical four-chamber view.
TAPSE (Tricuspid Annular Plane Systolic Excursion)
In order to obtain representative measurements, it is pivotal to align the M-mode line such that it does not overestimate distances e.g measuring the thickness of the left ventricular walls requires the line to be placed perpendicular to the long axis of the left ventricle, as illustrated in Figure 1. M-mode is useful for quantifying the mobility of structures and measuring dimensions. Since M-mode only analyzes a single ultrasound line, its temporal and axial resolution is very high, as compared with 2D echocardiography. The image will display all structures along that line over time (the x-axis displays time). The line is placed along the structures to be studied. M-mode images are acquired by manually placing an ultrasound line in the 2D image (Figure 1). Hence, the M-mode image displays all structures along one line (Figure 1). M-mode provides a one-dimensional view of all reflectors (i.e structures reflecting ultrasound waves) along one ultrasound line. Although it has now largely been replaced by 2D echocardiography, it is still used in clinical practice.
M-mode was previously the dominating modality in echocardiography.
0 kommentar(er)
