Lothman, Katherine A, and Allen W Mangel. “Pulse Synchronized Contractions (PSCs)”. Journal of Cardiology and Cardiovascular Medicine 4, no. 3 (November 15, 2019): 199–200. Accessed December 5, 2025. https://www.cardiologymedjournal.com/index.php/jccm/article/view/jccm-aid1067.