Action potential of sinoatrial node, illustration

---

Action potential of sinoatrial node, illustration. The 4-phase membrane potential of sinoatrial node cells is unstable and can be depolarized spontaneously. After depolarization reaches the threshold potential, it triggers a new action potential. This electrophysiological feature is called automaticity. In the human heart, the sinoatrial node has the strongest self-discipline and the fastest rate of 4-phase spontaneous depolarization, and determines heart rate.

---

Size: 3761px × 2077px
Location:
Photo credit: © CHONGQING TUMI TECHNOLOGY LTD/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, 4-phase, action, artwork, automaticity, avl, cardiology, condition, depolarization, diagnosis, diagnostic, diastolic, digitally, ecg, electrocardiogram, electrocardiograph, generated, healthcare, heart, human, illustration, impulse, interval, lead, male, medical, medicine, membrane, node, normal, potential, pr, qrs, rhythm, segment, sinoatrial, sinus, spontaneous, st, threshold, wave