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First electrocardiogram at hospital admission. (A) Patient 1. Electrocardiogram following adrenaline injection (1 mg). Sinus rhythm. Narrow QRS complex morphology. PR interval 180 msec. Axis 0°. (B) Patient 2. First electrocardiogram at hospital admission following adrenaline injection (2 mg). Sinus bradycardia (heart rate: 45 b.p.m.). PR interval 200 ms. cQT (Rautaharju): 452 ms. Narrow QRS complex with incomplete right bundle block.
