Heart sounds
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تم العمل بوساطة محمود جمعه

تم العمل بوساطة محمود جمعه

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Heart sounds Heart sounds Presentation Transcript

  • Heart sounds
  • First heart sounds
    • Causes:
    • 1.Valvular
    • 2.Vascular
    • 3.Muscular
    • Occur in Character: soft low pitched
  • Second heart sound
    • Occur at the end and beginning
    • Cause valvular
    • character
    View slide
  • 3 rd heart sound
    • Occur in maximum filling
    • Not heared except
    • Cause vascular
    View slide
  • 4 th heart sound
    • Occur inAS
    • Not heared
    • Cause mascular
  • Radial pulse
    • significanse
  • Heart rate
    • Innervation of the heart
    • 1.Cardioinhibitory centre
    • 2.Cardioacceleratory centre
  • Factors regulating the heart rate
    • 1.Afferent impulses
    • Intrinsic
    • Extrinsic
    • 2.Effect of other centres
    • a.CC
    • b.RC
    • c.hypothalamus
    • 3.change in chemical composition
    • a.O2 lack,CO2 excess,H+excess
    • b.Hormones
    • 4.Physical regulation
  • COP
    • Stroke volume
    • Minute volume
    • COP=SV / HR
    • Cardiac index
  • Factors affecting COP
    • 1.Venous return: influenced by
    • a.Pressure gradient
    • b.Respiratory movement
    • c.Sk ms contraction
    • d.Diameter of 1.arteriole
    • 2.cap
    • 3.veins
    • e.Cont of blood reservoir
    • f.Arterial pulsation
    • 2.Heart rate
    • a.Moderate changes
    • b.Sever changes
    • ABP
    • Increase result in decrease SV only for few beats
    • Sudden decrease result in increase SV only for few beats
    • Strenght of myocardium