atrial tachycardia: classification and cathether ablation · treatment of atrial tachycardia rf...
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Atrial Tachycardia: Classification and Cathether
Ablation
Saverio Iacopino, MD, FACC, FESC
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Tracy C. Cardiology Clinics. 1997;15:607-621.
Atrial Tachycardia ü 5-15% of all SVT’s
ü Higher in pediatric population ü Normal hearts ü S/P surgery for congenital lesions
ü Paroxysmal or persistent ü Persistent atrial tachycardia can cause tachycardia
induced cardiomyopathy
ü Variety of mechanisms ü Reentry ü Triggered and abnormal automaticity
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Types of Atrial Tachycardias
ü Focal origin ü Triggered, automatic, reentrant
ü Non-focal origin ü Anatomically/functionally mediated ü Scar mediated
ü Location ü Right or left atrium
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Treatment of Atrial Tachycardia
RF Ablation
ü No large reported series ü Improved success with new catheter technology ü Efficacy 80-98% ü Recurrence 5-20% ü Complications 1.6%
ü Ablations for multiple foci less successful
Tracy C. Cardiology Clinics. 1997;15:607-621.
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Atrial Tachycardia
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Iterative Atrial Tachycardia
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Target Site of Ablation
Early Activation
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Atrial Tachycardia Block During RF