during unstable ventricular tachycardia , the increase in sinus rate was more abrupt and was followed by a sharp decrease beginning before termination of the tachycardia and resulting in a slower rate after termination ( 56 +/- 15 beats/min ) than before tachycardia ( p less than 0.001 ) .
C0042514
ventricular tachycardia
C0039231
tachycardia