What is cavo tricuspid isthmus?

The cavo tricuspid isthmus is a narrow strip of heart tissue located between the inferior vena cava and the tricuspid valve. It is an important part of the heart's electrical conduction system and plays a role in maintaining a regular heart rhythm.

The cavo tricuspid isthmus is also known as the isthmus of the right atrium or the cavotricuspid isthmus. It is a commonly targeted area for catheter ablation procedures to treat certain types of irregular heart rhythms, such as atrial flutter. Ablation involves the use of radiofrequency energy to destroy the abnormal heart tissue that is causing the irregular heartbeat.

In addition to its role in heart rhythm regulation, the cavo tricuspid isthmus is also an important anatomical landmark in heart surgery and is used as a reference point for surgical procedures involving the right atrium and tricuspid valve.