correlation between the paced cycle length which induced va block , the shortest v1h2 interval achieved during premature ventricular stimulation and the cycle length of svt revealed that in all instances in which verapamil induced va block at a longer cycle length than in controls but did not prolong h2a2 or h-ae interval , the shortest v1h2 interval and the cycle length of svt ( h-h interval ) were significantly longer than the ventricular paced cycle length which produced va block .
C0042523
verapamil
C0039240
svt