Premodifier: pulseless ventricular
Head noun: tachycardia

Same concepts
http://dbpedia.org/resource/Ventricular_tachycardia

Broader concepts

labelprovenanceconfidence
shockable rhythmisap:1451164010.701426
cardiac arrhythmiumisap:1302142850.455313

Narrower concepts

labelprovenanceconfidence