dip phenomenon

dip phe·nom·e·non

complete disappearance of ventricular excitability followed by progressive recovery within a few microseconds at the end of excitation; the muscle as a whole repolarizes somewhat inhomogeneously, so that this period is one of special sensitivity to exogenous or endogenous stimuli and reentry.
References in periodicals archive ?
95) which explores all facets of the dip phenomenon.
In fact, several complications make the pressure dip phenomenon hard to understand.