IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-11-12-45393 Original Research Paper A Study On Normal Reference Values Of Echocardiographic Measurements In Geriatric Population Of West Bengal Subhashis Chakraborty Dr. Dr. Samir Kumar Roy Dr. Dr. Debarshi Jana Dr. December 2022 11 12 01 02