Home Search Contents Contact Partners

                 BioSignetics Corporation
                                                                    Digital Stethoscope Company                             




Innocent Still's Murmur in A Child

                         S1  S.Mur   S2   S3                              S1  S.Mur  S2    S3         
Diamond shaped systolic murmur follows S1. S3 follows S2.
Two consecutive heart beats are shown.

                            S1           Sys.mur               S2              S3
Single Heart Beat

Systolic Murmur Frequency Spectrum - very narrow ("musical")
indicative of Still's murmur

Systolic Murmur (our main interest here) has Intensity 24.85%,
Duration 56%; Frequency Score-1 (mean frequency) = 100 Hz
and Frequency Score-2 (half-bandwidth) = 8.07 Hz. Also this
is Grade 2 murmur. Narrow half-bandwidth confirms that this
is musical innocent Still's murmur.

                                                 S1    Mur     Sp.S2  S3
Energy Signature for a given heart beat.
S2 split is evident showing A2 and P2 as 2 peaks on the power
plot and two spots of energy on the energy signature.

                                                S1    Mur         S2    S3
Instantaneous frequency for murmur (energy density spectrum)
and power at murmur  frequency (100 HZ).


Diamond shaped Grade 2 low intensity (24%) systolic murmur
is immediately visible on the Phonocardiogram and Energy Signature
spectrogram. S2 spit is visible. Murmur intensity score (low) and
frequency  score (narrow) confirms that this is innocent Still's murmur.

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

                       S1            murmur          S2            S3      

Innocent Still's murmur shown with superimposed EKG tracing.

Note how beginning of S1 matches QRS and end of T-wave matches
beginning of S2.

Heart Sound was recorded by Meditron Analyzer (Welch-Allyn)
(R. Geggel, MD)



All Materials and Images are subject to the Copyright.
Copyright: 2004-2009 BioSignetics Corporation
Last modified: 02/02/09