dicrotic notch

notch

 [noch]

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.

Rivinus' notch (tympanic notch) a defect in the upper tympanic part of the temporal bone, filled by the upper portion of the tympanic membrane. Called also Rivinus' or tympanic incisure.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

di·crot·ic notch

(dī-krot-ik),

the acute drop followed by a rise in arterial pressure pulse curves following the systolic peak, corresponding to the incisura of the displacement pulse curve.

Farlex Partner Medical Dictionary © Farlex 2012

di·crot·ic notch

(dī-krot'ik noch)

The acute drop in arterial pressure pulse curves following the systolic peak, corresponding to the incisura of the displacement pulse curve.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012