Question

serious signs and symptoms of unstable tachycardia are usually not seen with ventricular rates less than:

Answer 1

Ventricular tachycardia is partially identified by a rate greater than 120 beats per minute (bpm) and usually less than 220 bpm. Remember that tachycardia is any rate over 100 bpm. It is uncommon for VT to develop at a rate less than 120 bpm, and it is even less common to see VT with serious symptoms below 150 bpm.