The Right Ventricular Moderator Band: From Leonardo da Vinci's Drawings to Current Cardiac Imaging

Area of Science:

• Cardiovascular Anatomy
• Cardiac Imaging
• Electrophysiology

Background:

• The moderator band (MB) and right ventricle (RV) trabeculations are crucial cardiac structures.
• Understanding their anatomy and variations is essential for diagnosing and treating cardiac conditions.

Purpose of the Study:

• To review the detailed anatomy of the moderator band (MB) and the trabeculated right ventricle (RV).
• To describe morphological variations of the MB and its relationship with adjacent right ventricular structures.
• To correlate histological findings with advanced imaging modalities and discuss interventional applications.

Main Methods:

• Comprehensive review of anatomical literature on the moderator band and right ventricular trabeculations.
• Analysis of morphological variations and spatial relationships.
• Integration of data from echocardiography, CT, MRI, and intracardiac/transesophageal echocardiography.

Main Results:

• Detailed description of moderator band anatomy and its variations.
• Elucidation of the spatial relationship between the MB, papillary muscles, and RV free wall.
• Demonstration of imaging modalities for visualizing these structures and guiding interventions.

Conclusions:

• Accurate anatomical knowledge of the MB and RV trabeculations is vital.
• Advanced imaging aids in understanding variations and guiding interventions.
• The MB is a relevant target for treating RV arrhythmias and structural interventions.