fig1
Figure 1. Electrocardiogram depicts a rhythm strip recorded from leads V1-V6 (10 s) with three premature ventricular contractures (PVCs). The heart rate was 72 beats/min. The study was performed on April 8, 2009. This EKG was done on the next day after a single IFN-beta-1a injection (11 µg SC). Two additional rhythm strips (10 s each) revealed 5 more PVCs (not shown)
