Sinai, N. K.; Hamdani, R.; Putra, A. E.; Elfi, E. F.; Silvia, N.; Sriyanti, R. Correlation Between Heart Rate and Left Ventricular Ejection Fraction in Peripartum Cardiomyopathy Patients at RSUP Dr. M. Djamil Padang. JIKESI 2025, 6, 1-7.