the mean plasma level required for prevention of spontaneous episodes of symptomatic sustained tachycardia in the vt group was 9.1 +/- 3.4 micrograms/ml , while the mean level required for 85 % suppression of pvcs in the same patients was 14.9 +/- 3.8 micrograms/ml ( p less than 0.01 ) .
C0039231
tachycardia
C0042514
vt