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  2. Artificial cardiac pacemaker - Wikipedia

    en.wikipedia.org/wiki/Artificial_cardiac_pacemaker

    The primary purpose of a pacemaker is to maintain an even heart rate, either because the heart's natural cardiac pacemaker provides an inadequate or irregular heartbeat, or because there is a block in the heart's electrical conduction system. Modern pacemakers are externally programmable and allow a cardiologist to select the optimal pacing ...

  3. Cardiac pacemaker - Wikipedia

    en.wikipedia.org/wiki/Cardiac_pacemaker

    An artificial cardiac pacemaker (or artificial pacemaker, so as not to be confused with the natural cardiac pacemaker) or just pacemaker is an implanted medical device that generates electrical impulses delivered by electrodes to the chambers of the heart either the upper atria, or lower ventricles to cause the targeted chambers to contract and ...

  4. Cardiac Pacemakers, Inc. - Wikipedia

    en.wikipedia.org/wiki/Cardiac_Pacemakers,_Inc.

    The first heart patient to receive a CPI pacemaker emerged from surgery in June 1973. Within two years, the upstart company that challenged Medtronic had sold approximately 8,500 pacemakers. [3] Medtronic at the time had 65% of the artificial pacemaker market. CPI was the first spin-off from Medtronic.

  5. Pacemaker current - Wikipedia

    en.wikipedia.org/wiki/Pacemaker_current

    The pacemaker current (I f, or I Kf, also called funny current) is an electric current in the heart that flows through the HCN channel or pacemaker channel. Such channels are important parts of the electrical conduction system of the heart and form a component of the natural pacemaker .

  6. 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 ...

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

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

    Pacemakers are also sometimes used to regulate the heartbeats in people with congenital heart disease, a group of conditions that affect about 1% of people born in the U.S., according to the ...

  8. Implantable cardioverter-defibrillator - Wikipedia

    en.wikipedia.org/wiki/Implantable_cardioverter...

    The difference between pacemakers and ICDs is that pacemakers are also available as temporary units and are generally designed to correct slow heart rates, i.e. bradycardia, while ICDs are often permanent safeguards against sudden life-threatening arrhythmias. S-ICD lead and generator position Sketch of an already-implanted cardioverter ...

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