ventricular aberration

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1. deviation from the normal or usual.
2. imperfect refraction or focalization of a lens.
chromatic aberration unequal refraction by a lens of light rays of different lengths passing through it, producing a blurred image and a display of colors.
dioptric aberration (spherical aberration) inability of a spherical lens to bring all rays of light to a single focus.
ventricular aberration aberrant ventricular conduction.

ab·er·rant ven·tric·u·lar con·duc·tion

abnormal intraventricular conduction of a supraventricular beat, especially where surrounding beats are normally conducted.