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b'Guglielmo Marconi was a leading figure in the development of wireless telegraphy -- now known as radio -- during the Age of Invention, from the late 19th to the early 20th century. He died in 1937 at the age of 63 -- 10 years after he had a heart attack, followed by a type of chest pain called angina pectoris. Retired Upstate cardiologist Guglielmo Marconi was a leading figure in the development of wireless telegraphy -- now known as radio -- during the Age of Invention, from the late 19th to the early 20th century. He died in 1937 at the age of 63 -- 10 years after he had a heart attack, followed by a type of chest pain called angina pectoris. Retired Upstate cardiologist Harold Smulyan, MD Harold Smulyan, MD, professor emeritus of medicine in cardiology, talks about the treatment Marconi is documented to have received. Smulyan and three co-authors researched the life and death of Marconi for a, professor emeritus of medicine in cardiology, talks about the treatment Marconi is documented to have received. Smulyan and three co-authors researched the life and death of Marconi for a recently published paper recently published paper. The co-authors include Upstate cardiologist. The co-authors include Upstate cardiologist Daniel Villarreal, MD Daniel Villarreal, MD; Robert S. Pinals, MD, a former chief of rheumatology at Upstate; and Pinals\' granddaughter, Lisa Pinals, a PhD candidate. Previously, Smulyan has researched the heart-related deaths of historical figures including; Robert S. Pinals, MD, a former chief of rheumatology at Upstate; and Pinals\' granddaughter, Lisa Pinals, a PhD candidate. Previously, Smulyan has researched the heart-related deaths of historical figures including President Warren G. Harding President Warren G. Harding and "Wizard of Oz" author and Central New York native and "Wizard of Oz" author and Central New York native L. Frank Baum. L. Frank Baum.'