Fig. 2
From: A novel stop-gain pathogenic variant in the KCNQ1 gene causing long QT syndrome 1
A The baseline 12-lead standard electrocardiogram indicates a normal sinus rhythm, a normal QRS frontal axis, and a normal corrected QT interval. B Four minutes after exercise cessation, the corrected QT interval is about 480 ms, deemed prolonged for this situation. C The image presents the leads of ambulatory monitoring. The corrected QT interval is normal in most of the leads but is prolonged in the right lower panel