Morphologic classification of the right auricule on 256-slice computed tomography.

Area of Science:

• Cardiovascular Imaging
• Anatomical Morphology
• Medical Diagnostics

Background:

• The right auricule's anatomical variations are crucial for cardiac procedures.
• Understanding its morphology can prevent intra-procedural complications.

Purpose of the Study:

• To investigate and classify the diverse shapes of the right auricule.
• To utilize 256-slice computed tomography (CT) for detailed morphological analysis.

Main Methods:

• Cardiac multidetector CT angiography was performed on 500 participants (250 male, 250 female).
• Right auricule morphology was analyzed and categorized after image reconstruction.
• Participants maintained normal sinus rhythm and blood pressure during the study.

Main Results:

• Right auricule morphology was classified into five types and nine subtypes.
• Type IV (reverse L shape) was most prevalent (28.4%), followed by Type II (M shape, 24.0%).
• Type Ia was more frequent in females, and Type IIa was more frequent in males, indicating sex-based differences.

Conclusions:

• A comprehensive understanding of right auricule anatomical morphology is essential.
• This knowledge can optimize atrial pacing, radiofrequency ablation, and other surgical interventions.
• Accurate morphological assessment aids in preventing potential complications during cardiac procedures.