Fig. 3

Electrocardiogram alterations in animals treated with Hlsv. ECG from two animals of the treated group showing (a) atrial premature complex and (b) ventricular premature complex 15 min after the envenomation. (c) At T0, all QRS complexes were normal. At T5, all complexes changed the morphology to rS wave. Velocity 50 mm/s, sensibility 2 N, lead II. (d) At T0, T wave was 0.05 mV. At T20, T wave more than doubled its amplitude, reaching 0.12 mV. At T30 T wave was 0.16 mV. (e) Increase on QT interval from 67 ms at T0, to 97 ms at T20 and 107 ms at T30. (f) Increase on PR interval from 43 ms at T0, to 50 ms at T10 and, then, to 63 ms at T30. Velocity 50 mm/s, sensibility 2 N, lead II