BioSignetics Corporation
                                                                    Digital Stethoscope Company                             

Mitral Valve Prolapse Study:

Single Click

                        S1    Click          S2   diastole     S1         Click       S2         
Two Heart Beats

                                  S1                         Click                   S2             diastole 
Single Heart Beat

                                                     S1                 Click                S2             diastole 
Another Single Heart Beat

                                                               Main Frequency 1        Main Frequency 2 
Click Frequency Spectrum

                                                           S1        cl        S2
Energy Signature -click is evidenced by its higher frequency
and short duration  in comparison with S1 and S2. S2 split.

 Power plot.                                      S1      cl        S2

Click is short, mid systolic and upper frequency is high 99+51= 150 Hz.
Click is differentiated from murmur by its short duration.

STUDY 2 - MVP Multiple Clicks

                   S1   clicks-3 S2               S1   cl            S2      
 

Single heart beat.  S1          c1 c2 c3   S2      diastole

Click frequency spectrum.

Heart Energy Signature- 3 click energy blobs are visible in late systole.

                                              1 2 3
Power vs Time- 3 click energy blobs are visible in late systole.

         Frequency                       Power at 150 Hz frequency      
Instantaneous characteristic of the first click.

CONCLUSIONS:

Systolic click --  single or multiple in the second half of the systole.
Mitral Valve Prolapse.

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: 2004-2008 BioSignetics Corporation
Last modified: 01/01/08