Figure 1
From: A Combination of Atrioventricular Block and Sinoatrial Block in a Horse
Base-apex electrocardiogram recorded from a horse with concomitant second degree atrioventricular and sinoatrial block. The underlying rhythm is a slight sinus arrhythmia. The pause between the first blocked P wave and the next P wave is slightly longer than 2 P-P intervals indicating SAB. Paper speed is 25 mm per second and calibration 10 mm equal to 1 mV.