Ramus limbi dextri: demonstration by coronary angiography

Area of Science:

• Pediatric Cardiology
• Cardiac Anatomy
• Coronary Circulation

Background:

• Detailed anatomical knowledge of coronary artery variants is essential for accurate diagnosis and treatment in pediatric cardiology.
• The moderator band and its vascular supply are critical components of right ventricular function and tricuspid valve support.

Purpose of the Study:

• To describe a previously unrecognized small branch of the main septal artery identified during pediatric coronary cineangiography.
• To characterize the anatomical course and potential functional significance of this newly observed vessel.

Main Methods:

• Retrospective analysis of pediatric coronary cineangiograms.
• Detailed visualization and tracing of coronary artery branches, particularly those directed towards the right ventricle.
• Identification of a distinct vascular structure coursing through the moderator band.

Main Results:

• A small arterial branch originating from the main septal artery was consistently observed.
• This vessel courses through the moderator band into the anterior papillary muscle.
• The artery exhibits a fan-shaped blush, indicating its vascular territory.

Conclusions:

• The identified vessel, termed the ramus limbi dextri (artery of the moderator band), represents a distinct anatomical entity.
• This artery plays a role in the vascularization of the moderator band and anterior papillary muscle.
• Recognition of the ramus limbi dextri is important for a comprehensive understanding of pediatric coronary anatomy and right ventricular function.