The arterial and venous cannulas (or tubes) are attached to the heart enabling blood to flow through the heart-lung bypass machine.

Labels: Arterial Cannula, Venous Cannula

The heart is arrested (stopped) with a cold water/potassium solution that affects cell function and stops contractions and administered through the cardioplegia cannula.

Labels: Cardioplegia Cannula

A clamp is placed across the aorta stopping flow of blood and oxygen to the heart.