Comment on WHAT'S UP DOC? Pacemaker

WHAT'S UP DOC? Pacemaker

Q: My dad fainted and they told him needed a pacemaker. I would like to understand more about pacemakers.A: To understand pacemakers, the first step is to understand the normal electrical activity of the heart. Each of the half billion cells in the heart plays a role in its mechanical contraction (of the atria, which ‘passively fill’ with blood and then squeeze blood out to load the ventricles, and of the ventricles, with the right [...]

 

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