Figure 7From: Phono-spectrographic analysis of heart murmur in children Fairly large perimembranous VSD in a 7-month-old. A fairly large perimembranous VSD with normal pulmonary artery pressure (RESP = Respiration). On auscultation a fourth-degree systolic murmur was heard, and on palpation a small thrill was felt in the left third intercostal space. The phonogram shows a pansystolic murmur, but S1 and S2 are distinguishable. P2 is not enhanced and is split normally. This also suggests that pulmonary resistance is normal. Area of auscultation: left third ic space (LIC3). Pansystolic (duration 100 %), peak frequency 523 Hz and volume 61%.Back to article page