The Heart’s Pacemaker
<p>It never lets us down, at least it shouldn’t in the healthy and usually doesn’t. Whether day or night, whether we’re running, cycling, or facing other everyday challenges. Whether we’re having a heated conversation with our partner or waiting for a job interview.</p>
<p>The heart is a masterpiece. The rhythm of the heart originates in the sinus node, our primary pacemaker, a cluster of specialized cells located within our heart. It beats automatically. Here arises the stimulus, the impulse that is transmitted over fine electrical pathways throughout the entire heart so that the filling and ejection of the heart, that is, the blood, is optimally matched to the body’s needs. This precisely regulates the pumping function of the heart muscle. The sinus node is influenced by our autonomic nervous system, responsible for the fight or flight mode. So the next time we see a bear or tiger in the woods, our pacemaker will sound the alarm. Kidding but you get the point.</p>
<p><a href="https://medium.com/long-sweet-valuable/the-hearts-pacemaker-51b776bd3053"><strong>Learn More</strong></a></p>