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
In this disorder, the sinoatrial node is generating electrical complexes, but the electrical activity fails to conduct in the atrium. Sinoatrial automaticity is preserved, and the P waves are generated at a regular rate in a regular pattern which are a multiple of the basic sinus cycle. In patients with sinus exit block, the block is more frequently associated with either an atrial or an AV junctional escape rhythm.
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.