Dear Dr. Roach: At age 76, I was diagnosed with sinus node dysfunction last year after several episodes of what I'd call being "spaced out" (for lack of a better term). I couldn't explain these ...
In order for the heart to do its work of pumping oxygen-rich blood to the body, it needs a trigger or electrical impulse to generate a heartbeat. This electrical impulse originates from the sinus node ...
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