Premature activation of the ventricle responsible for the pre-excitation syndrome of the Wolff-Parkinson-White or Lown-Ganong-Levine types. ... (05 Mar 2000) ... 
Type: Term Pronunciation: an′te-sis′tō-lē Definitions: 1. Premature activation of the ventricle responsible for the preexcitation syndrome of the Wolff-Parkinson-White or Lown-Ganong-Levine types.