Marthanda Varma Sankaran Valiathan (born 24 May 1934) is an Indian cardiac surgeon. He is a former president of the Indian National Science Academy and contributed to the development of medical technology in India. He is currently a National Research Professor of the Government of India, located in Manipal University. He was awarded the Padma Vibhushan in 2005. He was made a Hunterian Professor of the Royal College of Surgeons of England in 1969 and a Chevalier in the order of Palmes Academiques, an honour bestowed by the French government, in 1999. He received the Dr. Samuel P. Asper International Award from Johns Hopkins University in 2009 for his contributions to international medical education.
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