Definitions for sinoatrial node
ˈsaɪ noʊˈeɪ tri əl, ˌsaɪ-sinoa·tri·al node

Princeton's WordNetRate this definition:0.0 / 0 votes

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

   a specialized bit of heart tissue that controls the heartbeat

WikipediaRate this definition:0.0 / 0 votes

1. Sinoatrial 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.

ChatGPTRate this definition:0.0 / 0 votes

1. sinoatrial node

   The sinoatrial node, also known as the SA node, is a group of cells located in the right atrium of the heart. These cells are responsible for initiating the electrical impulses that regulate the heart's rhythm, giving them the name "natural pacemaker of the heart".

WikidataRate this definition:0.0 / 0 votes

1. Sinoatrial node

   The sinoatrial node is the impulse-generating tissue located in the right atrium of the heart, and thus the generator of normal sinus rhythm. It is a group of cells positioned on the wall of the right atrium, near the entrance of the superior vena cava. These cells are specialized cardiomyocytes. Though they possess some contractile filaments, they do not contract robustly. The SAN was first described in 1907 by Arthur Keith and Martin Flack.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Sinoatrial Node

   The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).

Matched Categories

1. • Cardiac Muscle

How to pronounce sinoatrial node?

1. Alex

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How to say sinoatrial node in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of sinoatrial node in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of sinoatrial node in Pythagorean Numerology is: 3

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=sinoatrial node
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Sinoatrial_Node
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=sinoatrial node