coronary sinus

American  

noun

Anatomy.

1. a large venous channel in the heart wall that receives blood via the coronary veins and empties into the right atrium.

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Etymology

Origin of coronary sinus

First recorded in 1825–35

Example Sentences

It is delivered through a catheter to the coronary sinus, where it is then expanded with a balloon, blocking flow through most of the vessel except for a small central orifice.

From Forbes • Feb. 5, 2015

Once in place the device causes an increase in coronary sinus pressure that appears to relieve angina, though the authors acknowledge that the “physiological rationale for a beneficial effect… remains unclear.”

From Forbes • Feb. 5, 2015

Blood is flowing into the right atrium from the superior and inferior venae cavae and the coronary sinus.

From Textbooks • Jun. 19, 2013

The exception to this is that most venous blood flow from the coronary veins flows directly into the coronary sinus and from there directly into the right atrium.

From Textbooks • Jun. 19, 2013

The left part of the sinus venosus, which does not enlarge at the same rate as the right part, remains as the coronary sinus.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" by Various