Palacios, Saúl Smisek, Radovan Curila, Karol Nguyen, Uyen Prinzen, Frits W. Halamek, Josef Plesinger, Filip Jurak, Pavel Ramos, Javier Martínez, Juan Pablo Pueyo, Esther Ventricular activation and repolarization in response to physiological and conventional pacing using ultra-high-frequency electrocardiography PLoS One 10.1371/journal.pone.0344111 2026 2026