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Basic electrocardiography and Beyond

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cardiac action potential ,depolarization,repolarization,lead placement,einthoven law,einthoven triangle,additional leads,lewis leads,mason likar modification,dipole,hemifields,vectorcardiography

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Basic electrocardiography and Beyond

  1. 1. BASICELECTROCARDIOGRAPHY AND BEYOND Dr. N. Praveen M.D.,D.M.
  2. 2. Contents       
  3. 3. Introduction
  4. 4. Scalar Electrocardiography
  5. 5. Basic terminology de re • Depolarization is faster than repolarization.
  6. 6. Electrodes four six
  7. 7. reference electrode. the exploring electrode,
  8. 8. Wilson central terminal
  9. 9. Leads bipolar potential
  10. 10. Leads • 12 leads
  11. 11. Bipolar limb leads
  12. 12. Einthoven triangle
  13. 13. Einthoven’s law Helpful rule to remember to detect instances in which the technician has attached the electrodes to the wring limbs.
  14. 14. Based on Einthoven triangle and the recordings
  15. 15. Limb lead reversal
  16. 16. Unipolar limb leads
  17. 17. Why the augmentation ?
  18. 18. Relationship between the bipolar and unipolar limb leads
  19. 19. Unipolar chest leads
  20. 20. Additional leads
  21. 21. Specific leads
  22. 22. significant reduction significant increase inability of the exercise test to predict the location of coronary artery disease and high incidence of false negative tests in patients with ischaemia limited to the inferior cardiac surface.
  23. 23. Vectorcardiography
  24. 24. • Heart’s forces are represented by arrows and loops, rather than by waves and complexes.
  25. 25. • An instantaneous vector mean vector
  26. 26. Dipole • An electrode that faces the head of the vector records positive deflection regardless of whether the dipole approaches the electrode or moves away.
  27. 27. Cardiac muscle action potential
  28. 28. Hemifields positive line
  29. 29. Ventricular depolarization
  30. 30. Take home message
  31. 31. Thank you

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