Figure 6From: A color spectrographic phonocardiography (CSP) applied to the detection and characterization of heart murmurs: preliminary results Aortic stenosis in a 6-year-old patient, (CASE 4). Aortic stenosis in a 6-year-old patient. The recording covers 5 heart cycles and takes 5.40 seconds. The murmur is between S1 and S2 and extends to about 400 Hz (CASE 4).Back to article page