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The Intern At Work: Internal Medicine
129. Too Fast, Too Furious - An Approach to SVT
Mar 6, 2022
Exploring the complexities of superventricular tachycardia (SVT) including AVRT and AVNRT, understanding symptoms, triggers, and initial assessment methods. Detailed guide on diagnosing SVT with emphasis on rhythm differentiation and diagnostic tests. Strategies for managing SVT such as synchronized cardioversion, vagal maneuvers, medication options, and insights from the Revert trial on a modified balsalva maneuver.
14:47
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Quick takeaways
- Understanding AVRT and AVNRT pathways in SVT helps in identification and management.
- Patient history and physical exams are crucial for identifying triggers and managing SVT.
Deep dives
The Electrical Conduction System of the Heart
The heart's electrical conduction system, including the SA node, AV node, and bundle of His, regulates the heart's contractions. Disruptions in this system can lead to superventricular tachycardia, causing abnormal heart rhythms due to extra electrical pathways. AVRT involves accessory pathways bypassing the AV node, while AVNRT utilizes re-entry circuits within the AV node. Understanding these mechanisms helps identify and manage superventricular tachycardias.
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