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Electrocardiogram




            By
     H.Khorrami Ph.D.

http://khorrami1962.spaces.live.com
       khorrami4@yahoo.com
Aortic




CARDIAC CYCLE
                                 opens


                     Mitral
                     Closes


                                           Atrial Systole



                S1
                                        Isovolumic contract.
                                          Rapid Ejection

                                          Reduced Ejection

S2                                        Isovolumic Relax.
                                          Rapid Ventricular
                                          Filling

                                    Reduced Ventricular
                                    Filling


                                          Atrial Systole
                               Aortic
                               closes

                      opens
                      Mitral
LEFT VENTRICULAR PRESSURE/VOLUME P/V
                                                   LOOP

                                    120        F
                                                              E
LEFT VENTRICULAR PRESSURE (mmHg)




                                     80                                           D




                                     40


                                               A          B
                                                                              C
                                     0
                                          50                  100             150
                                               LEFT VENTRICULAR VOLUME (ml)
PRESSURE/VOLUME RELATIONSHIPS UNDER
        DIFFERENT CONDITIONS




 PRELOAD      AFTERLOAD    CONTRACTILITY

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ECG

  • 1. Electrocardiogram By H.Khorrami Ph.D. http://khorrami1962.spaces.live.com khorrami4@yahoo.com
  • 2.
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  • 12.
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  • 17. Aortic CARDIAC CYCLE opens Mitral Closes Atrial Systole S1 Isovolumic contract. Rapid Ejection Reduced Ejection S2 Isovolumic Relax. Rapid Ventricular Filling Reduced Ventricular Filling Atrial Systole Aortic closes opens Mitral
  • 18. LEFT VENTRICULAR PRESSURE/VOLUME P/V LOOP 120 F E LEFT VENTRICULAR PRESSURE (mmHg) 80 D 40 A B C 0 50 100 150 LEFT VENTRICULAR VOLUME (ml)
  • 19. PRESSURE/VOLUME RELATIONSHIPS UNDER DIFFERENT CONDITIONS PRELOAD AFTERLOAD CONTRACTILITY