AS Level Physical
   Education
PE 1 – The articulate Performer
         Cardiac Cycle
      Karen Vaughan Jones
Outcomes
 By the end of this lesson you should
  know:
 The function of the cardiac cycle during
  blood transportation
...
The cardiac cycle
 As the blood travels around the heart a
  cardiac cycle occurs
 A cardiac cycle occurs in ONE
  COMPL...
Stages of the cardiac cycle
   Each cycle takes 0.8 seconds and on average 72
    times per minute
   Four stages to eac...
Activity
    Using the notes provided – summarise
     the four stages of a cardiac cycle on
     the ohp sheet
    Reca...
1. Atrial diastole
 Upper chambers of the heart are filled
  with blood returning from:
 The body via the venae cavae to...
Atrial diastole
2. Ventricular diastole
 As soon as the atrio-ventricular valves
  open the second stage of the cardiac
  cycle occurs
 ...
Ventricular diastole
3. Atrial systole
 As the atria contract, atrial systole
  occurs which ensure all the blood is
  emptied in to the ventr...
Atrial systole
4. Ventricular Systole
   Ventricular pressure increases – overcomes
    the pressure in the aorta and the pulmonary
    ...
Ventricular systole
Timings of systole and diastole
Conduction system
 The conducting system relies on
  transmissions of impulses and consists
  of cardiac muscle cells and...
 Unlike skeletal muscle – heart produces
  its own impulse – myogenic
 Begins at the SA node sino atrial
PEShare.co.uk Shared Resource
PEShare.co.uk Shared Resource
PEShare.co.uk Shared Resource
PEShare.co.uk Shared Resource
PEShare.co.uk Shared Resource
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PEShare.co.uk Shared Resource

  1. 1. AS Level Physical Education PE 1 – The articulate Performer Cardiac Cycle Karen Vaughan Jones
  2. 2. Outcomes  By the end of this lesson you should know:  The function of the cardiac cycle during blood transportation  Understand the specific details of a systole and diastole  Understand the conduction system of the heart
  3. 3. The cardiac cycle  As the blood travels around the heart a cardiac cycle occurs  A cardiac cycle occurs in ONE COMPLETE HEARTBEAT  This includes the filling of the heart with blood – DIASTOLE  Also includes the emptying of the blood in to the arterial system – SYSTOLE
  4. 4. Stages of the cardiac cycle  Each cycle takes 0.8 seconds and on average 72 times per minute  Four stages to each heartbeat  Diastole – atrial and ventricular  Systole – atrial and ventricular  Each stage is dependent on whether the chambers of the heart are filling with blood while the heart is relaxing – Diastole  Or whether they are emptying which occurs when the heart is contracting - Systole
  5. 5. Activity  Using the notes provided – summarise the four stages of a cardiac cycle on the ohp sheet  Recap: 3. Atrial diastole 4. Ventricular diastole 5. Atrial systole 6. Ventricular systole
  6. 6. 1. Atrial diastole  Upper chambers of the heart are filled with blood returning from:  The body via the venae cavae to the right atrium  The lungs via the pulmonary vein to the left atrium  The atrio-ventricular valves are shut at this moment, but as volume of blood increases the AV valves open to allow…
  7. 7. Atrial diastole
  8. 8. 2. Ventricular diastole  As soon as the atrio-ventricular valves open the second stage of the cardiac cycle occurs  As the ventricles fill with blood the semi-lunar valves remain shut  The atria now contract
  9. 9. Ventricular diastole
  10. 10. 3. Atrial systole  As the atria contract, atrial systole occurs which ensure all the blood is emptied in to the ventricles  The pressure increases – AV valves shut
  11. 11. Atrial systole
  12. 12. 4. Ventricular Systole  Ventricular pressure increases – overcomes the pressure in the aorta and the pulmonary artery  Semi-Lunar valves open – ventricles contract  Blood from the right ventricle- pulmonary artery  Blood from the left ventricle – aorta  Once completed – SL valves close  Cycle is complete
  13. 13. Ventricular systole
  14. 14. Timings of systole and diastole
  15. 15. Conduction system  The conducting system relies on transmissions of impulses and consists of cardiac muscle cells and conducting fibres that are specialised for initiating impulses and rapid conduction throughout the heart.  They initiate the normal heartbeat and co-ordinate contraction of the heart chambers
  16. 16.  Unlike skeletal muscle – heart produces its own impulse – myogenic  Begins at the SA node sino atrial

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