Fry E, Ayoub K, Sorrell VL, Souza J, Hesselson A, Leung S, et al. Echocardiographic Evaluation of His Bundle Pacing in Patients with Prolonged PR Intervals. ccm [Internet]. 2023 Mar. 16 [cited 2026 Jun. 21];7(2):69-78. Available from: https://fortunejournals.org/ojs/index.php/ccm/article/view/16394