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an indentation, especially one on the edge of a bone or other organ; called also incisure.
aortic notch (dicrotic notch) a small downward deflection in the arterial pulse or pressure contour immediately following the closure of the semilunar valves, sometimes used as a marker for the end of systole or the ejection period.
parotid notch the notch between the ramus of the mandible and the mastoid process of the temporal bones.
the notch in a sphygmographic tracing caused by rebound following closure of the aortic valves.
a·or·tic notch(ā-ōr'tik noch)
The notch in a sphygmographic tracing caused by rebound following closure of the aortic valves.