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Aortic Regurgitation Case Study: 1

                         S1  S.Mur   S2     dias.mur     S1                    S2         
Weak Systolic Murmur and Prolonged Diastolic Murmur
Diastolic Murmur is clearly visible on the Bell-filtered Phonocardiogram

 Diastolic Murmur Frequency Spectrum

Systolic Murmur Frequency Spectrum

                                                               S1                         S2
Energy Signature of One Heart Beat - Murmurs are weak and almost invisible

Systolic Murmur has Intensity =8.26%; Duration 89.17%;
Frequency Score 57.87Hz and half-bandwidth of 1.35 Hz
(low frequency musical); Grade 1.

Diastolic Murmur (our main interest here) has Intensity 9.48%,
Duration 137.5 %; Frequency Score 92.8Hz
and half-bandwidth 36.34; also Grade 1 murmur.

                Diast.Murmur                  S1(Sp)   Sys.mur
Energy Signature of Diastolic and Systolic Periods around S1

Diastolic Murmur Visible frequency track = 50 to 240 Hz

         Frequency                   Power at Peak Murmur Frequency                               

Instant Energy Density Spectrum (frequency) of Diastolic Murmur
and Power Distribution at peak murmur frequency


Diastolic Murmur of is immediately visible on the Phonocardiogram,
systolic murmur is also visible. Diastolic murmur is prolonged
(137% of S1-S2 distance) and weak (9.5% intensity, Grade 1).
Heart Energy signature around S2 heart sound demonstrates
both murmurs and their characteristic frequencies. S1 is split.

Heart Sound was taken from the Ears On Auscultation Program
and Database, www.corsonics.com (D.L. Roy, MD; B. Holt)


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Copyright: 2004-2009 BioSignetics Corporation
Last modified: 02/02/09