Ecg tracings teaching

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Ecg tracings teaching

  1. 1. ECG Tracing
  2. 2. Case 1 A 57 Y/O male patient had an arrhythmic attack during hospitalization. PSVT with (RBBB) cycle length alternans and a fixed short RP interval Cycle length alternans due to one longer and another shorter PR interval
  3. 3. Case 1 A 57 Y/O male patient had an arrhythmic attack during hospitalization. PSVT with (RBBB) cycle length alternans and a fixed short RP interval Cycle length alternans due to one longer and another shorter PR interval Diagnosis: Orthodromic AVRT with dual AVN physiology
  4. 4. Case 1:RAS1S2 500/380 ms One P with three Q 1. FAVN 2. SAVN 3. AVRT echo
  5. 5. Case 1: Spontaneous Initiation of SVT Orthodromic AVRT with antegrade FAVN and retrograde LL AP One P with Two Q
  6. 6. Case 2
  7. 7. Case 2 Small & narrow P wave  RA & LA depolarization simultaneously Diagnosis: SF AVNRT with 2:1 AV block A P wave in the midpoint between the two QRS beats
  8. 8. Case 2 AT with 2:1 AV block? What’s the next step?
  9. 9. Case 2: VOP 2:1 to 1:1 conduction
  10. 10. Case 3: What’s the mechanism of initiation of SVT? NSR with Preexcitation (RT AP)
  11. 11. Case 3 1 Q 2 P: one fast and one slow AP with the same atrial sequence Retrograde AP with longitudinal dissociation
  12. 12. Case 3 AP with decremental conduction
  13. 13. Case 4: W  N QRS tachycardia
  14. 14. Case 4: W  N QRS tachycardia VA dissociation VT H PSVT No H Wide to Narrow
  15. 15. Case 4 PPI-TCL=130 ms (>115 ms) V  A  V Diagnosis: FS AVNRT
  16. 16. Atypical AVNRT vs Septal AVRT (Michaud GF et al. JACC 2001)
  17. 17. Case 5 Two different retrograde P waves: two different pathways Pseudo R’ Pseudo S
  18. 18. Case 5 VA=102 ms VA=72 ms HV=178 ms HV=190 ms AVRT AVNRT alternatively
  19. 19. Case 6 RAS1S2 induced SF AVNRT
  20. 20. Case 6: After successful modification of SAVN RA burst induce narrow SVT with VA dissociation
  21. 21. Case 6:VOP terminate tachycardia Diagnosis: Junctional Tachycardia after ablation of SAVN
  22. 22. Case 7 PSVT with cycle length alternans and electrical alternans A fixed RP interval suggesting orthodromic AVRT Cycle length alternans due to dual AVN physiology Diagnosis: Orthodromic AVRT with dual AVN physiology long short
  23. 23. Case 7 NSR with intermittent preexcitation (RT AP)
  24. 24. Case 7 Diagnosis: Orthodromic AVRT using RT AP and Dual AVN physiology A fixed VA interval using RT AP Two different AH interval through fast and slow AVN
  25. 25. Case 8 Wide QRS complex tachycardia? (VA 1:1 conduction) PSVT with RBBB? (Atypical RBBB) Idiopathic LV-VT? (RBBB+LAD) Preexcitated tachycardia? (no delta wave)
  26. 26. Case 8: 60 seconds after adenosine Wide QRS=  Narrow QRS
  27. 27. Case 8: 65 seconds after adenosine H WQRS NQRS SF AVNRT No H V earlier VT
  28. 28. Case 9  Progressive Preexcitation Orthodromic AVRT with RBBB TCL=340 ms TCL=322 ms TCL=322 ms
  29. 29. Case 9 Change of retrograde accessory pathway
  30. 30. Case 10 Narrow QRS complex tachycardia with VA dissociation (V>A)
  31. 31. Case 10 Diagnosis: One VPC induced SF AVNRT with VA 2:1 conduction
  32. 32. 謝謝聆聽 敬請指教

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