gap phenomenon

gap phe·nom·e·non

a short period in the cycle of the atrioventricular or intraventricular conduction allowing passage of an impulse which at other times would be blocked in transit.
Synonym(s): excitable gap
Farlex Partner Medical Dictionary © Farlex 2012

gap phe·nom·e·non

(gap fĕ-nom'ĕ-non)
A short period in the cycle of the atrioventricular or intraventricular conduction allowing passage of an impulse that at other times would be blocked in transit.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012