Cause of death: heart failure
Yehudi Menuhin, Baron Menuhin (22 April 1916 – 12 March 1999), was an American-born British violinist and conductor who spent most of his performing career in Britain. He is widely considered one of the greatest violinists of the 20th century. He played the Soil Stradivarius, considered one of the finest violins made by Italian luthier Antonio Stradivari.
Source : Wikipedia
