Pulmonary venous evaluation using electrocardiogram-gated 64-detector row cardiac CT.

Area of Science:

• Cardiovascular Imaging
• Thoracic Surgery

Background:

• Radiofrequency ablation is a standard atrial fibrillation treatment.
• Precise pulmonary vein anatomy and dimensions are vital for successful ablation procedures.

Purpose of the Study:

• To investigate dynamic changes in pulmonary vein dimensions during the cardiac cycle.
• To assess the utility of 64-detector row cardiac CT for these measurements.

Main Methods:

• Retrospective analysis of ECG-gated cardiac CT angiography in 40 patients.
• Measurement of pulmonary vein diameter and area at the ostium during end-diastole and end-systole.
• Utilized curved multiplanar reformats for precise dimensional analysis.

Main Results:

• Pulmonary vein diameter and area were significantly larger at end-systole compared to end-diastole.
• Superior pulmonary veins exhibited the most substantial dimensional changes.
• High interobserver correlation ( >0.9) confirmed measurement reliability.

Conclusions:

• Pulmonary vein dimensions exhibit significant cardiac cycle variation, particularly at the ostia.
• ECG-gated cardiac CT offers enhanced precision for pulmonary vein dimensional assessment.
• Understanding these dynamic changes may inform future research on pulmonary vein function.