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2. Pacemaker potential - Wikipedia

   en.wikipedia.org/wiki/Pacemaker_potential

   In a healthy sinoatrial node (SAN, a complex tissue within the right atrium containing pacemaker cells that normally determine the intrinsic firing rate for the entire heart [3] [4]), the pacemaker potential is the main determinant of the heart rate. Because the pacemaker potential represents the non-contracting time between heart beats , it is ...

3. Cardiac pacemaker - Wikipedia

   en.wikipedia.org/wiki/Cardiac_pacemaker

   The action potential generated by the SA node passes down the electrical conduction system of the heart, and depolarizes the other potential pacemaker cells (AV node) to initiate action potentials before these other cells have had a chance to generate their own spontaneous action potential, thus they contract and propagate electrical impulses ...

4. Cardiac action potential - Wikipedia

   en.wikipedia.org/wiki/Cardiac_action_potential

   In pacemaker cells (e.g. sinoatrial node cells), however, the increase in membrane voltage is mainly due to activation of L-type calcium channels. These channels are also activated by an increase in voltage, however this time it is either due to the pacemaker potential (phase 4) or an oncoming action potential. The L-type calcium channels are ...

5. 8 Common Cardiovascular Diseases for Men & How to Prevent Them

   www.aol.com/8-common-cardiovascular-diseases-men...

   Other potential causes include: Heart tissue scarring from a previous heart attack or other cause. ... A pacemaker. Implantable cardioverter defibrillator (a device that shocks your heart into a ...

6. Sinoatrial node - Wikipedia

   en.wikipedia.org/wiki/Sinoatrial_node

   Once the pacemaker potential reaches a set value, the threshold potential, it produces an action potential. [2] Other cells within the heart (including the Purkinje fibers [11] and atrioventricular node) can also initiate action potentials; however, they do so at a slower rate and therefore, if the SA node is functioning properly, its action ...

7. Pacemaker action potential - Wikipedia

   en.wikipedia.org/wiki/Pacemaker_action_potential

   A pacemaker action potential is the kind of action potential that provides a reference rhythm for the network. The pacemaker potential is the slow depolarization because of sodium influx, and once threshold has been reached the continued depolarization due to calcium influx. [ 1 ]

8. Arnold Schwarzenegger just got a pacemaker. Here's what to ...

   www.aol.com/lifestyle/arnold-schwarzenegger-just...

   Pacemakers are also sometimes used temporarily when someone is recovering from a heart attack or heart surgery, but in this case only the wires are inserted into the body; the pacemaker box stays ...

9. My 2-year-old daughter needed a pacemaker. That spurred me to ...

   www.aol.com/finance/2-old-daughter-needed...

   Patients with heart failure are misdiagnosed at a rate of 16% in hospitals and nearly 70% when general practitioners refer patients to specialists, according to a study in the Journal of Cardiac ...