the heart rate was faster before runs of ventricular tachycardia than before isolated extrasystoles ( p less than 0.01 ) and a positive linear correlation was observed between the mean preceding heart rate and the type of extrasystolic activity , the length of the runs increasing with increasing preceding heart rate ( r = 0.98 , p less than 0.001 ) .
C0042514
ventricular tachycardia
C0039231
increasing