Sinus Bradycardia - Sinus Rhythms.
Description
- Rhythms are often named according to the origin of the electrical activity in the heart or the structure where the problem is occurring.
- Sinus Rhythms are aptly named due to the locus of stimulation being the SA (sinoatrial) node.
- With Sinus Bradycardia the locus of stimulation is the same as normal sinus rhythm, just now the rate will be less than 60 bpm. Recall that “brady” means slow.
- The only difference between sinus bradycardia and normal sinus rhythm is the rate. All other steps in the rhythm analysis are “normal”.
Practice Strip
- Analyze this tracing using the five steps of rhythm analysis.
- Compare your answers with the answers on the next slide.
Show Answer
- Rhythm: Regular
- Rate: 56 (27 small boxes)
- P wave: Upright and Uniform
- PR interval: 0.18 sec
- QRS: 0.10 sec
- Interpretation: Sinus Bradycardia
Authors and Reviewers
Authored by Thomas O'BrienMedically reviewed by Dr. Jonathan Keroes, MD, Cardiology
Last Update: 11/8/2020
