in the second patient , progressively premature atrial or ventricular depolarizations did not terminate the tachycardia . carotid massage had no consistent effect on retrograde va conduction during ventricular tachycardia , but usually resulted in gradual increases in the tachycardia cycle length ( 50 - 100 msec ) before abrupt termination of the tachycardia .
C0042514
ventricular tachycardia
C0039231
tachycardia