Concealed conduction

Jump to: navigation, search
Concealed conduction

WikiDoc Resources for Concealed conduction

Articles

Most recent articles on Concealed conduction

Most cited articles on Concealed conduction

Review articles on Concealed conduction

Articles on Concealed conduction in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Concealed conduction

Images of Concealed conduction

Photos of Concealed conduction

Podcasts & MP3s on Concealed conduction

Videos on Concealed conduction

Evidence Based Medicine

Cochrane Collaboration on Concealed conduction

Bandolier on Concealed conduction

TRIP on Concealed conduction

Clinical Trials

Ongoing Trials on Concealed conduction at Clinical Trials.gov

Trial results on Concealed conduction

Clinical Trials on Concealed conduction at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Concealed conduction

NICE Guidance on Concealed conduction

NHS PRODIGY Guidance

FDA on Concealed conduction

CDC on Concealed conduction

Books

Books on Concealed conduction

News

Concealed conduction in the news

Be alerted to news on Concealed conduction

News trends on Concealed conduction

Commentary

Blogs on Concealed conduction

Definitions

Definitions of Concealed conduction

Patient Resources / Community

Patient resources on Concealed conduction

Discussion groups on Concealed conduction

Patient Handouts on Concealed conduction

Directions to Hospitals Treating Concealed conduction

Risk calculators and risk factors for Concealed conduction

Healthcare Provider Resources

Symptoms of Concealed conduction

Causes & Risk Factors for Concealed conduction

Diagnostic studies for Concealed conduction

Treatment of Concealed conduction

Continuing Medical Education (CME)

CME Programs on Concealed conduction

International

Concealed conduction en Espanol

Concealed conduction en Francais

Business

Concealed conduction in the Marketplace

Patents on Concealed conduction

Experimental / Informatics

List of terms related to Concealed conduction

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


Definitions of conduction abnormalities

Aberrant conduction

Cardiac conduction through pathways not normally conducting cardiac impulses, particularly through ventricular tissue.

Anterograde conduction

Transmission of a cardiac impulse in the normal direction, from the sinus node to the ventricles, particularly forward conduction through the atrioventricular node.

Concealed conduction

Incomplete penetration of a propagating impulse through the cardiac conducting system such that electrocardiograms reveal no evidence of transmission but the behavior of one or more subsequent impulses is somehow affected. A common example would be an interpolated PVC (a type of premature ventricular contraction) during normal sinus rhythm; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node. However, this AV node stimulation (which is not visible on EKG by itself, hence "concealed") can cause a delay in subsequent AV conduction by modifying the AV node's subsequent conduction characteristics. Hence, the P-R interval after the PVC is longer than the baseline P-R interval.

Another variation on this concept is seen in atrial flutter. As a result of the rapid atrial rate, some of the atrial activity fails to get through the AV node in an antegrade direction but can alter the rate at which a subsequent atrial impulse is conducted. In this circumstance, an alteration in the F-wave to QRS relationship is seen.

Concealed retrograde conduction

Retrograde conduction blocked in the atrioventricular node; it does not produce an extra P wave but leaves the node refractory to the next normal sinus beat.

Retrograde conduction

transmission of a cardiac impulse backward in the ventricular to atrial direction, particularly conduction from the atrioventricular node into the atria.

See also



Linked-in.jpg