Lehigh Acres, FL
A 27-year-old male asked:
where does the electricity of the sa node in the heart come from?does it self spark?
2 doctor answers • 3 doctors weighed in
Cardiology 31 years experience
The brain: the signal comes from the brain --
3493 viewsAnswered >2 years ago
Cardiology 51 years experience
Nodal activation: The 'electricity' comes from the gradients of Na, K, across the membranes and changes to trigger these. Read the following for a general idea of how it works....
3493 viewsReviewed >2 years ago
Last updated Oct 24, 2017
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
$15 per month
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.