Sinoatrial arrest pathophysiology
|
Sinoatrial arrest Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Sinoatrial arrest pathophysiology On the Web |
|
American Roentgen Ray Society Images of Sinoatrial arrest pathophysiology |
|
Risk calculators and risk factors for Sinoatrial arrest pathophysiology |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Sinoatrial arrest (also known as sinus arrest or sinus pause) is a medical condition wherein the sinoatrial node of the heart transiently ceases to generate the electrical impulses that normally stimulate the myocardial tissues to contract and thus the heart to beat. It is defined as lasting from 2.0 seconds to several minutes.
Pathophysiology
In this disorder, the sinoatrial node is not generating electrical complexes due to impairment of Sinoatrial automaticity. In patients with sinus arrest, the pause is more frequently associated with either an atrial or an AV junctional escape rhythm. In sick sinus syndrome, lower pacemakers are impaired as well, therefore it can present as a complete absence of electrical activity on EKG.