sinus node dysfunction


Also found in: Acronyms.

sinus node dysfunction

Cardiology A disturbance, impairment or defect in the behavior of the sinoatrial/SA node. See Sick sinus syndrome.
References in periodicals archive ?
The major indication for pacemaker implantation in this study was found out to be other causes (sinus node dysfunction, degenerative diseases of conduction system).
The toolkit will include: diagnostic algorithms, informational videos and resources to educate patients about sinus node dysfunction, available treatment options and information on benefits and risks associated with the various treatments.
The exercise can also assess the type and severity of sinus node dysfunction present, based on the heart rate and rhythm response to the stress.
Adverse effects of sympatholytic agents in patients with hypertension and sinus node dysfunction. Am J Med 1978; 64:1013-20.
The diagnosis requires documentation of sinus node dysfunction and correlation with the associated symptoms of sick sinus syndrome.
Also noteworthy, sinus node dysfunction was present as ectopic atrial rhythm was shown at presentation and normalized to sinus rhythm only after reperfusion.
Permanent pacemaker implantation is generally indicated in patients with symptomatic sinus node dysfunction. Such sinus node dysfunction maybe the result of age related degeneration or secondary to ischemic, infiltrative, endocrinologic, or autonomic diseases [1].
Similarly, during RCA percutaneous interventions, distal embolization of plaque components after balloon inflation and stent implantation may cause sinus node dysfunction, severe bradycardia, which are mostly expected to occur during proximal RCA interventions as a consequence of plaque shifting into a proximally located SAN artery.
The mechanisms of SND during exercise are thought to be mainly due to increased provocation of the Bezold-Jarisch reflex caused by inferior ischemia or direct sinus node ischemia or coronary angiography or intrinsic sinus node dysfunction. It is also manifested by vigorous myocardial contraction with the drugs (dobutamine, isoproterenol) or exercise.