Laxmi Vilas Ghimire, MBBS
Institute of medicine 
Tribhuvan University Teaching Hospital 
Kathmandu, Nepal

Abstract
   Christian Doppler is an Austrian scientist who remains in history of science because of his discovery on Doppler Effect. The theory which was later proved experimentally has got a number of applications in various fields of science: in medicine, astronomy, physics, aviation and meteorology. Doppler ultrasonography has now become the main noninvasive modality for functional assessment of heart and blood vessels and has been extensively used to explore the abnormalities in vascular territories in brain, kidneys and other organs. This article aims to review the life and work of Christian Doppler and to review Doppler effect and its importance and applications in modern medicine. 
   Key Words: Christian Doppler, Doppler effect, medicine