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. 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
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. Case 2 AT with 2:1 AV block? What’s the next step?
20. Case 6: After successful modification of SAVN RA burst induce narrow SVT with VA dissociation
21. Case 6:VOP terminate tachycardia Diagnosis: Junctional Tachycardia after ablation of SAVN
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. Case 7 NSR with intermittent preexcitation (RT AP)
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. 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. Case 8: 60 seconds after adenosine Wide QRS= Narrow QRS
27. Case 8: 65 seconds after adenosine H WQRS NQRS SF AVNRT No H V earlier VT
28. Case 9 Progressive Preexcitation Orthodromic AVRT with RBBB TCL=340 ms TCL=322 ms TCL=322 ms