====== Bradycardia ======

  * Bradycardia is defined as a heart rate (HR) that is below normal for the given age. For an adult (18 years and older), the range of heart rate is usually 60--100 beats per minute (BMP).
  * Bradycardia = HR < 60 BPM

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===== Differential Diagnosis =====

==== Cardiac ====

  * **[[Acute coronary syndrome]] (ACS)** including [[myocardial infarction]] (MI)
  * **[[Pericarditis]]**
  * **[[Sick sinus syndrome]] (SSS)**
  * **[[Third-degree atrioventricular block|Third degree AV block]]** also known as complete heart block

==== Pulmonary ====

  * **[[Hypoxia]]**
  * **[[Sleep apnea]]**

==== Neurological ====

  * **[[Increased intracranial pressure]]**
  * **Vasovagal response**

==== Toxicology ====

  * **[[Drug use and abuse]]:** narcotics, cannabinoids
  * **[[Medication overdose]]:** [[beta-blocker]], [[calcium channel blocker]], [[digoxin]]

==== Miscellaneous ====

  * **Athletic**
  * **[[Hyperkalemia]]**
  * **[[Hypothermia]]**
  * **[[Hypothyroidism]]**

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===== References =====

  * EBM Consult. [[https://www.ebmconsult.com/articles/differential-diagnosis-bradycardia#jump_ss_101211|Bradycardia: Differential Diagnosis]]. Retrieved on 2020-02-17.
  * Hafeez Y, Grossman SA. [[https://www.ncbi.nlm.nih.gov/books/NBK493201/|Sinus Bradycardia]]. StatPearls [Internet]. Last updated 2019-11-18 and retrieved on 2020-02-17.
  * Nickson C. [[https://litfl.com/bradycardia-ddx/|Bradycardia DDx]]. Life in the Fastlane. Last updated 2019-03-26 and retrieved on 2020-02-17.