Noninvasive visualization of the cardiac venous system using multislice computed tomography

Area of Science:

• Cardiovascular imaging
• Anatomical studies
• Medical diagnostics

Background:

• Cardiac resynchronisation therapy (CRT) requires left ventricular (LV) lead placement via the coronary sinus (CS).
• Variations in CS anatomy can impact LV lead implantation success.
• Pre-procedural anatomical knowledge is essential for optimizing CRT outcomes.

Purpose of the Study:

• To assess the utility of multislice computed tomography (MSCT) in delineating cardiac venous anatomy.
• To identify and categorize anatomical variations of the CS and its tributaries.
• To provide anatomical data that may aid in LV lead placement for CRT.

Main Methods:

• Retrospective analysis of MSCT scans from 38 patients.
• Classification of anatomical variants based on venous system continuity at the crux cordis.
• Measurement of CS ostium diameter and distances between major venous tributaries.

Main Results:

• Significant anatomical variations were observed in the coronary sinus and its tributaries.
• Separate insertion of the CS and small cardiac vein into the right atrium occurred in 63% of patients.
• Continuity between anterior and posterior venous systems at the crux cordis was noted in 29% of cases.

Conclusions:

• MSCT is a valuable tool for evaluating coronary sinus anatomy and variations.
• Observed anatomical variability underscores the need for pre-procedural imaging.
• Knowledge of cardiac venous anatomy can guide decisions regarding transvenous LV lead placement for CRT.