Definition

1. Noun:
   • A short sinus receiving most of the veins of the heart; empties into the right atrium: The coronary sinus is a large venous channel located on the posterior surface of the heart. It collects deoxygenated blood from the majority of the heart's own veins (the cardiac veins) and delivers it into the right atrium of the heart.

Usage Examples

• Noun:
  • The surgeon carefully identified the coronary sinus before proceeding with the cardiac procedure.
  • A blockage in the coronary sinus can impair venous drainage from the heart muscle.

Advanced Usage

• "Coronary sinus ostium": The opening or mouth of the coronary sinus where it empties into the right atrium.

  • The cardiologist examined the size of the coronary sinus ostium during the echocardiogram.

• "Coronary sinus catheterization": A medical procedure involving the insertion of a catheter into the coronary sinus, often for diagnostic purposes or to deliver therapies.

  • Coronary sinus catheterization is sometimes used to measure metabolic activity of the heart.

Variants and Related Words

• Coronary veins (n): The veins of the heart that drain into the coronary sinus.
  • The great cardiac vein is a major tributary of the coronary sinus.

Synonyms

• Great cardiac vein (Note: This is a major tributary, not a perfect synonym. The coronary sinus is the main collecting chamber for these veins.)
• Cardiac sinus (A less common alternative term).

Noun

1. a short sinus receiving most of the veins of the heart; empties into the right atrium