Suranagi, M. J., Subramanyam, K., Subramani, K. S., & Srinivasa, K. H. (2020). Tissue doppler imaging for estimation of left ventricular filling pressure in patients with systolic and diastolic heart failure: a comparative simultaneous doppler catheterization study. International Journal of Advances in Medicine, 7(2), 319–325. https://doi.org/10.18203/2349-3933.ijam20200088