<unk>  is a short, vibrating murmur in systolic ejection manner and can be heard over the mid precordium (slightly lateral to left lower sternal border) or apex in children that is not accompanied by any other abnormalities. 
First described by Sir George<unk>  (1868-1941) and thought to arise from vibrations of the attachments of the pulmonary valve leaflets.
Still's murmur
Austin Flint murmur
Dock's murmur
Muffled heart sounds
Continuous murmur
Graham-Steell murmur
Functional murmur
Diastolic heart murmur