case_images: PMC6374786_01
case_images: Electrocardiogram performed on first visit. The U waves are seen in precordial derivations (arrows). In V2-V3-V4, they are fused to the end of the T waves. In V5-V6, inverted T waves are followed by subtle U waves. The pseudo-prolonged QT interval actually results from the measurement of a long QU interval. HR = heart rate; bpm = beats per minute; QT = QT interval; QTc = corrected QT interval; ms = milliseconds.
case_images: CRIGM2019-3104187.001.jpg
case_images: PMC6374786_01_CRIGM2019-3104187.001.jpg
case_images: fig1
case_images: An EKG showed sinus bradycardia, a prolonged QT interval, and prominent U waves (Figure 1).
case_images: Macroscopic aspect of villous adenoma.
case_images: CRIGM2019-3104187.002.jpg
case_images: PMC6374786_01_CRIGM2019-3104187.002.jpg
case_images: fig2
case_images: The patient underwent transanal endoscopic microsurgery (TEMS) successfully (Figure 2).