II. Pathophysiology
- Normal pattern in healthy adults and athletes
- Baseline Bradycardia suggests physical conditioning
- Other causes of Sinus Bradycardia
- See Drug Induced Bradycardia
- Hypothermia
- Severe infection
- Jaundice
- Carotid Sinus Hypersensitivity
- Tight shirt collar
- Excessive parasympathetic stimulation
- Acute inferior wall Myocardial Infarction
- Decreased sympathetic stimulation (medications)
III. Diagnostics: EKG Findings
- Regular rhythm with rate at <50 to 60 beats per minute
- Normal and consistent P-wave morphology
- Normal PR-Interval duration
IV. Differential Diagnosis
- See Bradycardia
V. Management
- Usually physiologic and requires no treatment
- If hemodynamically unstable, see Unstable Bradycardia
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Related Studies
| Definition (NCI) | A disorder characterized by an electrocardiographic finding of abnormally slow heart rate with its origin in the sinus node. Thresholds for different age, gender, and patient populations exist. (CDISC) |
| Definition (NCI_CTCAE) | A disorder characterized by a dysrhythmia with a heart rate less than 60 beats per minute that originates in the sinus node. |
| Concepts | Pathologic Function (T046) |
| ICD10 | R00.1 |
| SnomedCT | 309746001, 207040007, 49710005 |
| English | SINUS BRADYCARDIA, [D]Sinus bradycardia (context-dependent category), [D]Sinus bradycardia, Sinus bradycardia, sinus bradycardia (diagnosis), sinus bradycardia, Bradycardia sinus, bradycardia sinus, [D]Sinus bradycardia (situation), Sinus bradycardia (disorder), bradycardia; sinus, sinus; bradycardia, Sinus Bradycardia |
| Italian | Bradicardia sinusale |
| German | Sinusbradycardie, SINUSBRADYKARDIE, Sinusbradykardie |
| Japanese | 洞性徐脈, ﾄﾞｳｾｲｼﾞｮﾐｬｸ |
| Spanish | [D]bradicardia sinusal (categoría dependiente del contexto), BRADICARDIA SINUSAL, [D]bradicardia sinusal (situación), [D]bradicardia sinusal, bradicardia sinusal (trastorno), bradicardia sinusal, Bradicardia sinusal |
| Portuguese | BRADICARDIA SINUSAL, Bradicardia sinusal |
| French | BRADYCARDIE SINUSALE, Bradycardie sinusale |
| Czech | Sinusová bradykardie |
| Hungarian | Sinus bradycardia |
| Dutch | bradycardie; sinus, sinus; bradycardie, sinusbradycardie |
