Data Availability Statement The data underlying this article cannot be shared publicly because of patient privacy concerns. All relevant data are included within the article. Supporting Information Filename Description pace70437-sup-0001-Video1.mp43.8 MB Supporting File 1: pace70437-sup-0001-Video1.mp4 pace70437-sup-0002-Video2.mp4841.5 KB Supporting File 2: pace70437-sup-0002-Video2.mp4 References 1, “Congenital Heart Block,” Cardiology Clinics 41, no. 3 (2023): 399–410.