What does SA node mean?

Definitions for SA node
sa node

This dictionary definitions page includes all the possible meanings, example usage and translations of the word SA node.

Princeton's WordNet

  1. pacemaker, cardiac pacemaker, sinoatrial node, SA nodenoun

    a specialized bit of heart tissue that controls the heartbeat


  1. sa node

    The sinoatrial node (also known as the sinuatrial node, SA node or sinus node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells. The sinus node is approximately 15 mm long, 3 mm wide, and 1 mm thick, located directly below and to the side of the superior vena cava.These cells can produce an electrical impulse an action potential known as a cardiac action potential that travels through the electrical conduction system of the heart, causing it to contract. In a healthy heart, the SA node continuously produces action potentials, setting the rhythm of the heart (sinus rhythm), and so is known as the heart's natural pacemaker. The rate of action potentials produced (and therefore the heart rate) is influenced by the nerves that supply it.


  1. sa node

    The SA node, or sinoatrial node, is a small mass of specialized cells located in the right atrium of the heart. It is known as the heart's natural pacemaker because it initiizes the electrical signals that regulate the heart's rhythm, triggering each heartbeat.

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  1. Chaldean Numerology

    The numerical value of SA node in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of SA node in Pythagorean Numerology is: 4

Translations for SA node

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"SA node." Definitions.net. STANDS4 LLC, 2023. Web. 29 Sep. 2023. <https://www.definitions.net/definition/SA+node>.

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    To cause to become
    • A. summon
    • B. abide
    • C. efface
    • D. render

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