Medication: Prescription medications can depress the sinus node function, potentially resulting in sinus node dysfunction include: beta blocker, non-dihydropyridine calcium channel blockers, digoxin, antiarrhythmic medications, and acetylcholinesterase inhibitors. Sinus Node Fibrosis: Replacement of the sinus node tissue by fibrous tissue is the most common cause of sinus node dysfunction, the replacement can also include other parts of the conduction system, including the AV node. Both could result from abnormal mechanisms, including fibrosis, atherosclerosis, and inflammatory/infiltrative processes. Sinus node dysfunction results from the abnormal automaticity, conduction, or both of the sinoatrial node and surrounding tissues. Sinus node dysfunction can be associated with atrial tachycardia as part of the tachycardia-bradycardia syndrome. Or the failure of the return of SA nodal activity after electrical cardioversion. Per definition, sinus node dysfunction should include symptoms and EKG findings simultaneously such as sinus bradycardia, sinus pauses or arrest, sinus exit blocks, or chronotropic incompetence (inadequate heart rate response to activity). Sinus node dysfunction, also known by its historical name sick sinus syndrome, is the inability of the SA node to produce an adequate heart rate that meets the physiologic needs of the individual. The SA node depolarizes and produces action potential almost synchronously. It is a complex compact region in the junction of superior vena cava and the right atrium. The sinoatrial node (SA) node is the dominant pacemaker of the heart. Summarize interprofessional team strategies for improving care coordination and communication to advance sinus node dysfunction and improve outcomes.Outline the treatment and management options available for sinus node dysfunction.Describe the evaluation of sinus node dysfunction.Identify the etiology and epidemiology of sinus node dysfunction.This activity reviews the etiology, diagnostic approach, and management of sinus node dysfunction and highlights the role of interprofessional team members in collaborating to provide well-coordinated care and enhance patient outcomes. Sinus node dysfunction is a disease that is characterized by the inability of the sinoatrial node of producing an adequate heart rate that meets the physiologic needs of an individual.
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