sinus node

[ sahy-nuhs ]

noun

, Anatomy.

1. sinoatrial node.

Example Sentences

Then they zap these intruders, erecting a line of defense so my sinus node, the heart's steady pacemaker, can do its work uninterrupted.

From Salon

They are also looking at a sometimes-fatal condition seen in humans, known as sick sinus syndrome, in which the natural cardiac pacemaker, the sinus node of the heart, beats much slower or more variably than normal.

From Nature

Over the course of a day, a person’s heart beats about 100,000 times, and each beat begins with an electrical signal generated in the sinus node in the heart’s upper right chamber.

From Washington Post

It has been definitely determined that the impulse to cardiac contraction originates in the sinus node, a collection of differentiated nerve cells situated at the junction of the superior vena cava with the right auricle.

From Project Gutenberg

This is called the sinus node, or the sino-auricular node, and consists of a small bundle of fibers resembling muscle tissue.

From Project Gutenberg