Villarroel-Ábrego, Hugo, and Andrés Di Leoni Ferrari. “QAOS (QUICK ASSESSMENT OF SYNCHRONY) PROTOCOL: AN ECHOCARDIOGRAPHIC STRATEGY FOR THE ASSESSMENT OF PACEMAKER-INDUCED CARDIAC DYSSYNCHRONY”. Seven Editora, Feb. 2026, pp. 284-03, https://sevenpubl.com.br/editora/article/view/9317.