Contrast pericardiography facilitates intrapericardial navigation under fluoroscopy

Area of Science:

• Veterinary Medicine
• Cardiovascular Imaging
• Interventional Cardiology

Background:

• Standard fluoroscopy has limitations in visualizing intricate cardiac structures.
• Intrapericardial navigation requires enhanced imaging techniques for accuracy.

Purpose of the Study:

• To evaluate the efficacy of contrast pericardiography for intrapericardial navigation in pigs.
• To assess the accuracy of cardiac structure identification and device placement using this technique.

Main Methods:

• Contrast pericardiography was performed in 8 juvenile pigs using ionic contrast injected into the pericardial space.
• Fluoroscopic images were graded, and a cardiac restraint device (CRD) was placed guided by enhanced visualization.
• Postmortem examination assessed CRD placement accuracy and histological effects of the contrast agent.

Main Results:

• Contrast pericardiography significantly improved the clarity and delineation of cardiac structures compared to standard fluoroscopy.
• The CRD was accurately positioned at the atrioventricular (AV) groove, confirming precise anatomical identification.
• No adverse topical effects on the heart were observed following intrapericardial contrast administration.

Conclusions:

• Contrast pericardiography is an effective technique for enhancing visualization of intrapericardial structures.
• This method facilitates accurate anatomical localization, aiding in procedures like CRD placement.
• Improved fluoroscopic visualization holds promise for developing novel limited-access and percutaneous intrapericardial interventions.