Ticagrelor therapy and atrioventricular block: Do we need to worry?

Figure 1 Patient #1. Continuous electrocardiograph monitoring showing paroxysmal episodes of 2:1 atrioventricular block with narrow QRS and lengthening of PP interval (associated sinus bradycardia).

Figure 2 Patient #2. Holter electrocardiograph monitoring showing episodes of paroxysmal complete atrioventricular block associated with PP interval lengthening. Baseline wide QRS complex.