Recording of an innocent<unk>  in a toddler<unk>  (also known as vibratory murmur) is a common type of benign or "innocent" functional heart murmur that is not associated with any sort of cardiac disorder or any other medical condition. It can occur at any age although it is most common among children two to seven years of age and it is rare in adulthood.<unk>  was initially described by Dr. George Frederic<unk> , England's first professor of childhood medicine at the Great Ormond Street Hospital for Children. In his pediatric textbook Common Disorders and Diseases of Childhood (published 1909) Dr.<unk>  noted: “I should like to draw attention to a particular bruit which has somewhat of a musical character, but is neither of sinister omen nor does it indicate endocarditis of any sort. …its characteristic feature is a twangy sound, very like that made by twanging a piece of tense string... Whenever may be its origin, I think it is clearly functional, that is to say, not due to any organic disease of the heart either congenital or acquired.”
Still's murmur
Austin Flint murmur
Carey Coombs murmur
Graham Steell murmur
Third heart sound
Heart click
Cabot–Locke murmur
Grand Rounds