The CzermakâHering test is a
vagal maneuver consisting of the application of external digital pressure to the
carotid sinus.[1] The test is performed at the patient's bedside by imposing moderate pressure with the fingers, repeatedly massaging the left or the right
carotid arteries.
Johann Nepomuk Czermak stated that mechanical compression of the carotid artery due to the carotid sinus reflex initiates a stimulus of the heart inhibitory branches of the
vagus nerve.[3]
^Takino, Masuichi; Takino, Yoshitada; Sugahara, Kunikazu (March 1964). "Apparatus and method for measurement of digital pressure applied to carotid sinus for causing carotid sinus syndrome". Acta Neurovegetativa. 26 (1): 93â103.
doi:
10.1007/BF01227300.
PMID14134393.
S2CID1780809.
^Miyazaki, M. (1 February 1981). "Circulatory response in Aschner and Czermak-Hering tests, with special reference to cerebral circulation". Angiology. 32 (2): 106â112.
doi:
10.1177/000331978103200202.
PMID7212384.
S2CID5637061.