case_images: PMC3200192_01
case_images: Initial ECG demonstrating tall, symmetric T waves, and prolonged PR intervals (P waves marked with arrows).
case_images: EMI2010-879751.001.jpg
case_images: PMC3200192_01_EMI2010-879751.001.jpg
case_images: fig1
case_images: The providers further interpreted this ECG to show a prolonged PR interval and peaked T waves (Figure 1).
case_images: Rhythm strip showing progressive PR prolongation with subsequent dropped QRS complex, consistent with Wenckebach (P waves marked with arrows).
case_images: EMI2010-879751.002.jpg
case_images: PMC3200192_01_EMI2010-879751.002.jpg
case_images: fig2
case_images: His rhythm strip revealed grouped beating, with a PR interval that progressively prolonged with each of three successive QRS complexes, followed by a nonconducting P wave (Figure 2).
case_images: ECG following resolution of hyperkalemia, with first-degree AV block (PR interval 232 ms) and resolution of peaked T waves.
case_images: EMI2010-879751.003.jpg
case_images: PMC3200192_01_EMI2010-879751.003.jpg
case_images: fig3
case_images: His ECG immediately prior to discharge demonstrated resolution of the previously seen Wenckebach pattern, however, with a persistently prolonged PR interval of 232 ms consistent with type 1 AV block, and normal T wave morphology (Figure 3).