fig2
![Cardiac arrhythmia with premature ventricular contractures induced by interferon beta in a patient with multiple sclerosis](https://image.oaes.cc/21fa28e9-86e6-47f0-8870-03173b9e0ffd/112.fig.2.png)
Figure 2. Electrocardiogram depicts a rhythm strip recorded from leads V1-V6 (10 s) without premature ventricular contractures (PVCs). The study was performed on April 14, 2009 and revealed normal sinus rhythm with the heart rate 71 beats/min. This EKG was done 7 days after a single IFN-beta-1a injection (11 µg SC). Two additional rhythm strips (10 s each) revealed no PVCs as well (not shown)