ad. 45. What is imaging in an M mode?

It is one of the oldest modes in ultrasonographic imaging employed in echocardiographic scans of children and adults for assessment of contractility, the width of cavities, walls thickness and the rhythm of a heart. The M-mode consists in obtaining a dynamic cross-section of the heart cavities, which then is analyzed over the time. An M presentation is used in obstetric examinations for assessment of the rhythm and contractility of a fetal heart.