| Sinus node dysfunction | |
|---|---|
| Other names | Sick sinus syndrome or sinoatrial node disease |
 | |
| Telemetry strip of a 44-year-old female with asymptomatic sinus pause found while admitted for mildly symptomatic COVID-19 pneumonia. | |
| Complications | Tachycardia-bradycardia syndrome |
| Diagnostic method | electrocardiogram |
| Treatment | Pacemaker implantation |
Sinus node dysfunction (SND), also known as sick sinus syndrome (SSS), is a group of abnormal heart rhythms (arrhythmias) usually caused by a malfunction of the sinus node, the heart's primary pacemaker.[1][2] Tachycardia-bradycardia syndrome is a variant of sick sinus syndrome in which the arrhythmia alternates between fast and slow heart rates.[3]
- ^ Kusumoto FM, Schoenfeld MH, Barrett C, Edgerton JR, Ellenbogen KA, Gold MR, et al. (20 August 2019). "2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society". Circulation. 140 (8): e382–e482. doi:10.1161/CIR.0000000000000628. PMID 30586772.
- ^ Dobrzynski H, Boyett MR, Anderson RH (10 April 2007). "New Insights Into Pacemaker Activity: Promoting Understanding of Sick Sinus Syndrome". Circulation. 115 (14): 1921–1932. doi:10.1161/CIRCULATIONAHA.106.616011. PMID 17420362.
- ^ Tse G, Liu T, LiKH, Laxton V, Wong AO, Chan YW, et al. (March 2017). "Tachycardia-bradycardia syndrome: Electrophysiological mechanisms and future therapeutic approaches (Review)". International Journal of Molecular Medicine. 39 (3): 519–526. doi:10.3892/ijmm.2017.2877. PMC 5360359. PMID 28204831.