Sinai, Nadiva Kezia, et al. “Correlation Between Heart Rate and Left Ventricular Ejection Fraction in Peripartum Cardiomyopathy Patients at RSUP Dr. M. Djamil Padang”. Jurnal Ilmu Kesehatan Indonesia, vol. 6, no. 1, Mar. 2025, pp. 1-7, doi:10.25077/jikesi.v6i1.1298.