Kumar, M. A., J. Muralikrishna, and A. Acharya. “The ECG Changes in Various Comorbidities With Hypertension and Without Hypertension”. International Journal of Research in Medical Sciences, vol. 8, no. 4, Mar. 2020, pp. 1351-6, doi:10.18203/2320-6012.ijrms20201323.