Current trends in supraventricular tachycardia management.

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BACKGROUND: Supraventricular tachycardia (SVT) is a general term describing a group of arrhythmias whose mechanism involves or is above the atrioventricular node. The mechanisms of most forms of SVT have been elucidated, and pharmacologic and invasive therapies have evolved simultaneously. METHODS: We provide a brief overview of the mechanisms, classifications, and electrocardiographic characteristics of different SVTs and describe current trends in noninvasive and invasive therapies. RESULTS: The term SVT encompasses a heterogeneous group of arrhythmias with different electrophysiologic characteristics. Knowledge of the mechanism of each SVT is important in determining management at the bedside and in the electrophysiology laboratory. CONCLUSION: In the acute setting, vagal maneuvers and pharmacologic therapy can be effective in arrhythmia termination. Catheter-based radiofrequency ablation has revolutionized therapy for many SVTs, and newer techniques have significantly improved ablation efficacy and reduced periprocedural complications and procedure times. Cryoablation is currently being investigated as an alternative form of energy delivery, although the long-term effectiveness of this procedure currently limits its use for many SVTs.

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