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murmur gradeCardiology A standard system for indicating the intensity of cardiac sounds, based on a scale of 1 to 6, by stethoscope. See Gallop, Murmur.
1 Barely audible-requires concentration
2 Soft, easily heard
3 Loud w/o thrill
4 Loud with thrill
5 Loud with minimal contact between stethoscope and chest
6 Loud with no contact between stethoscope and chest