Junctional bradycardia

WikiDoc Resources for Junctional bradycardia
Articles
Most recent articles on Junctional bradycardia Most cited articles on Junctional bradycardia Review articles on Junctional bradycardia Articles on Junctional bradycardia in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Junctional bradycardia Images of Junctional bradycardia Photos of Junctional bradycardia Podcasts & MP3s on Junctional bradycardia Videos on Junctional bradycardia
Evidence Based Medicine
Cochrane Collaboration on Junctional bradycardia Bandolier on Junctional bradycardia TRIP on Junctional bradycardia
Clinical Trials
Ongoing Trials on Junctional bradycardia at Clinical Trials.gov Trial results on Junctional bradycardia Clinical Trials on Junctional bradycardia at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Junctional bradycardia NICE Guidance on Junctional bradycardia NHS PRODIGY Guidance FDA on Junctional bradycardia CDC on Junctional bradycardia
Books
Books on Junctional bradycardia
News
Junctional bradycardia in the news Be alerted to news on Junctional bradycardia News trends on Junctional bradycardia
Commentary
Blogs on Junctional bradycardia
Definitions
Definitions of Junctional bradycardia
Patient Resources / Community
Patient resources on Junctional bradycardia Discussion groups on Junctional bradycardia Patient Handouts on Junctional bradycardia Directions to Hospitals Treating Junctional bradycardia Risk calculators and risk factors for Junctional bradycardia
Healthcare Provider Resources
Symptoms of Junctional bradycardia Causes & Risk Factors for Junctional bradycardia Diagnostic studies for Junctional bradycardia Treatment of Junctional bradycardia
Continuing Medical Education (CME)
CME Programs on Junctional bradycardia
International
Junctional bradycardia en Espanol Junctional bradycardia en Francais
Business
Junctional bradycardia in the Marketplace Patents on Junctional bradycardia
Experimental / Informatics
List of terms related to Junctional bradycardia

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: junctional escape; junctional escape rhythm

Overview

Junctional bradycardia is a slow (40 to 60 beats per minute) narrow complex escape rhythm that originates in the atrioventricular node to compensate for slow or impaired conduction of pacemaker activity in the atrium.

Pathophysiology

Normally, the atrioventricular node (AVN) can generate an escape rhythm of 40-60 beats per minute in case the sinoatrial node (SA node) or atrial pacemakers fail (sinus arrest) or slow (sinus bradycardia) or if there is complete heart block. This junctional escape rhythm generates a normal, narrow QRS complex rhythm at a rte below 60 beats per minute (junctional bradycardia) as the electrical impulses once they are generated are conducted with normal velocity down the usual pathways. Retrograde P waves (i.e. upside down) P waves due to retrograde or backward conduction may or may not be present.

Causes

• Acute MI
• Complete heart block
• Conduction system disease
• Digitalis toxicity.
• Heart surgery
• Ischemic heart disease
• NSTEMI
• Sinus arrest
• Sinus bradycardia
• STEMI