EAU CLAIRE, Wis. — Detecting a heart murmur on your own can be tricky. A murmur is an extra heart sound that can be heard by a stethoscope.

“The murmur may disappear as quickly as it comes if it has a temporary cause,” says Michel Barsoum, M.B., Ch.B., a cardiologist and vascular medicine specialist at Mayo Clinic Health System.

The valves in your heart act as doors between the chambers, or rooms, of the heart. In the case of a murmur, a valve may be tight or leaky. When heart valves are narrow, this is called stenosis.

Upon examination, however, medics discovered he had a heart murmur. ... Rees, are now urging parents not to ignore any worrying symptoms. Ms Bryan, an Army ... dangerous for small babies.