Parasystole

Revision as of 14:46, 20 August 2012 by WikiBot (talk | contribs) (Robot: Automated text replacement (-{{SIB}} +, -{{EH}} +, -{{EJ}} +, -{{Editor Help}} +, -{{Editor Join}} +))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Parasystole
MeSH D017574

WikiDoc Resources for Parasystole

Articles

Most recent articles on Parasystole

Most cited articles on Parasystole

Review articles on Parasystole

Articles on Parasystole in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Parasystole

Images of Parasystole

Photos of Parasystole

Podcasts & MP3s on Parasystole

Videos on Parasystole

Evidence Based Medicine

Cochrane Collaboration on Parasystole

Bandolier on Parasystole

TRIP on Parasystole

Clinical Trials

Ongoing Trials on Parasystole at Clinical Trials.gov

Trial results on Parasystole

Clinical Trials on Parasystole at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Parasystole

NICE Guidance on Parasystole

NHS PRODIGY Guidance

FDA on Parasystole

CDC on Parasystole

Books

Books on Parasystole

News

Parasystole in the news

Be alerted to news on Parasystole

News trends on Parasystole

Commentary

Blogs on Parasystole

Definitions

Definitions of Parasystole

Patient Resources / Community

Patient resources on Parasystole

Discussion groups on Parasystole

Patient Handouts on Parasystole

Directions to Hospitals Treating Parasystole

Risk calculators and risk factors for Parasystole

Healthcare Provider Resources

Symptoms of Parasystole

Causes & Risk Factors for Parasystole

Diagnostic studies for Parasystole

Treatment of Parasystole

Continuing Medical Education (CME)

CME Programs on Parasystole

International

Parasystole en Espanol

Parasystole en Francais

Business

Parasystole in the Marketplace

Patents on Parasystole

Experimental / Informatics

List of terms related to Parasystole

Cardiology Network

Discuss Parasystole further in the WikiDoc Cardiology Network
Adult Congenital
Biomarkers
Cardiac Rehabilitation
Congestive Heart Failure
CT Angiography
Echocardiography
Electrophysiology
Cardiology General
Genetics
Health Economics
Hypertension
Interventional Cardiology
MRI
Nuclear Cardiology
Peripheral Arterial Disease
Prevention
Public Policy
Pulmonary Embolism
Stable Angina
Valvular Heart Disease
Vascular Medicine

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


Parasystole is a kind of arrhythmia caused by the presence and function of a secondary pacemaker in the heart, which works in parallel with the SA node. Parasystolic pacemakers are protected from depolarization by the SA node by some kind of entrance block. This block can be complete or incomplete.

Parasystolic pacemakers can exist in both the atrium or the ventriculus. Atrial parasystolia are characterized by narrow QRS complexes

ECG signals

On an ECG, parasystole may be recognized by:

  • spotting ectopic P or QRS waves which either:
    • occur at regular intervals
    • the time between them is always exact multiple of the smallest time between such two occurrences
  • spotting "fusioned" P or QRS complexes (sometimes rare)

Another feature is the varying coupling interval between sinus and ectopic beats.

External links

Template:WikiDoc Sources