SA node
Medical term EKG and Cardiovascular Testing
Sinoatrial node: the heart's natural pacemaker in the right atrium, where each normal beat starts.
Sources
Related terms
- atriumOne of the two upper chambers of the heart that receive blood returning to the heart.
- Purkinje fibersConduction fibers that spread the impulse through the ventricular walls so the ventricles contract.
- QRS complexThe EKG waveform showing ventricular depolarization.
- repolarizationThe return of a cell to its resting electrical state after depolarization.
- rhythm stripA printed EKG tracing from one lead, often six seconds long, used to assess heart rhythm.
- sinus bradycardiaA regular rhythm from the SA node at fewer than 60 beats per minute.
- sinus tachycardiaA regular rhythm from the SA node at more than 100 beats per minute.
- somatic tremorEKG artifact from muscle movement or shivering that makes the baseline jittery.
- ST segmentThe EKG section between the QRS complex and the T wave; elevation can signal an acute heart attack and…