AUTHOR=Ruiz-Pozo Viviana A. , Cadena-Ullauri Santiago , Paz-Cruz Elius , Tamayo-Trujillo Rafael , Guevara-Ramirez Patricia , Onofre-Ruiz Paul , Zambrano Ana Karina TITLE=Identification of a novel NKX2-5 variant in a young Ecuadorian patient with atrioventricular block and bradycardia: a case report JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2025.1552423 DOI=10.3389/fcvm.2025.1552423 ISSN=2297-055X