Identification of a novel NKX2-5 variant in a young Ecuadorian patient with atrioventricular block and bradycardia: a case report - Ruiz-Pozo, Viviana A.; Cadena-Ullauri, Santiago; Paz-Cruz, Elius; Tamayo-Trujillo, Rafael; Guevara-Ramirez, Patricia; Onofre-Ruiz, Paul; Zambrano, Ana Karina (Frontiers in Cardiovascular Medicine, 2025)