Fig 1.
Definitions for angles of insonation.
Fig 2.
Flowchart of the fetal heart clips.
Table 1.
Median frame rates and mean global longitudinal strain per angle of insonation.
Table 2.
Mean difference of GLS between different angles of insonation.
Table 3.
Mean difference of GLS between the angles of insonation as categorized by Semmler et al. [13].
Fig 3.
(A) Within the up/down angle of insonation, the myocardium is thinly depicted, and the kernels are all in the same axial alignment compared to the ultrasound beams. (B/C) The thickness of the myocardium is fully displayed in the perpendicular and oblique angles of insonation.