Rakesh Tumula, and Nrushen Peesapati. “Assessment of Biventricular Function by Echocardiography in Patients With Right Ventricular Apical Pacing”. Asian Pacific Journal of Health Sciences, vol. 8, no. 1, Jan. 2021, pp. 7-12, doi:10.21276/apjhs.2021.8.1.3.