Supraventricular Tachydysrhythmias in the Emergency Department | Digest
TOC Will Appear Here

Supraventricular Tachydysrhythmias in the Emergency Department

Below is a free preview. Log in or subscribe for full access. Or, get a free sample article Emergency Department Management of Abnormal Uterine Bleeding in the Nonpregnant Patient:
Please provide a valid email address.

Points & Pearls Excerpt

  • Supraventricular tachycardias (SVTs) arise at or above the atrioventricular (AV) node due either to abnormal automaticity or abnormal conduction.
  • AV nodal re-entry tachycardia (AVNRT) makes up 60%-70% of SVT cases due to a functional obstruction with 2 conduction systems within the node.
  • Ventricular pre-excitation (VPE) occurs when circus movements rely on anatomical accessory pathways from the atria to the ventricle. This is the mechanism of AV re-entry tachycardia (AVRT).
  • Wolff-Parkinson-White syndrome (WPW) involves conduction through a congenital accessory pathway, leading to pre-excitation to the ventricle. An ECG will reveal a shortened PR wave and up-swerving initiation of the R wave, called a delta wave.
  • Orthodromic (antegrade) conduction depolarizes through the bundle, resulting in a narrow QRS.
  • Antidromic (retrograde) conduction causes depolarization through the accessory pathway and retrograde progression through the AV node, leading to a wide QRS.

Most Important References

To Read The Companion Article:
To Read The Companion Article:
To Read The Companion Article:
Already purchased this course?
Log in to read.
Purchase a subscription

Price: $449/year

140+ Credits!

Purchase Issue & CME Test

Price: $59

+4 Credits!

Money-back Guarantee
Publication Information

Delbert D. Clark, DO, FAAEM; Morgan McGuire, MD; Mary Jones, MD; Heather Bruner, MD, FAAEM; David Bruner, MD, FAAEM

Peer Reviewed By

James E. Morris, MD, MPH; Jennifer White, MD

Publication Date

August 1, 2020

CME Expiration Date

August 2, 2023

CME Credits

4 AMA PRA Category 1 Credits™, 4 ACEP Category I Credits, 4 AAFP Prescribed Credits, 4 AOA Category 2-A or 2-B Credits

Pub Med ID: 32678566

Get Permission

CME Information

Content You Might Be Interested In

Identifying Urgent Care Patients With Chest Pain Who Are at Low Risk for Acute Coronary Syndromes

Urgent Care Approach to the Syncopal Patient

Emergency Department Management of Syncope

Atrial Fibrillation: An Approach to Diagnosis and Management in the Emergency Department

Get A Sample Issue Of Emergency Medicine Practice
Enter your email to get your copy today! Plus receive updates on EB Medicine every month.
Please provide a valid email address.