Butterfly in the Esophagus: What Is Wrong?

CC This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons. org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Figure 1. High resolution manometry findings with 30 mmHg isobaric contour in a same case before (A) and after (B) reinsertion of the manometry catheter. (A) Each wet swallow evoked a primary peristalsis ending with two closely fused high pressure zones to which a seemingly retrograde peristalsis was linked distally. (B) Wet swallows were frequently followed by a weak or failed peristalsis.