MedSelfEd Patient Education: Your Body Slide 4 of 9 - Permanent Pacemaker Implant
Cardiology Center
Tuesday, January 28, 2020

 


 
These contractions are triggered by a small piece of heart tissue called the SA node. The SA node generates a small electrical signal that is transmitted by nerves to the surrounding muscle. These electrical impulses are what cause the heart muscle to contract.
 
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