Transcatheter mapping and radiofrequencv ablation of cardiac arrhythmias

Predicting Interatrial Septum Rotation: Is the Position of the Heart or the Direction of the Coronary Sinus Reliable?

“…Knowledge of the complex anatomy of the atria is essential for safe and successful invasive electrophysiological procedures. We observed a mean IAS orientation of 36.8 ± 7.3° in this study, which is comparable to the right anterior oblique (RAO) 30–40 projection angle widely used during invasive electrophysiology procedures . However, the variability in IAS orientation observed (from 19.1° to 53°) requires adjustment of the projection angle for patients with IAS rotation.…”

“…We observed a mean IAS orientation of 36.8 ± 7.3°in this study, which is comparable to the right anterior oblique (RAO) 30-40 projection angle widely used during invasive electrophysiology procedures. 1 However, the variability in IAS orientation observed (from 19.1°to 53°) requires adjustment of the projection angle for patients with IAS rotation. This variability in IAS orientation is not unexpected.…”

“…An understanding of the complex anatomy of the interatrial septum (IAS) is of great importance to electrophysiologists. Many anatomical structures associated with the IAS, including Koch's triangle and the fossae ovalis, should be located via fluoroscopy during many types of procedures, including guiding transseptal puncture, coronary sinus (CS) cannulation, and catheter ablation of atrioventricular reentry tachycardia (AVNRT) . Determining the specific orientation of the IAS may be challenging for clinicians in some cases, but is essential for procedure safety .…”