(480.11) Morphometrical Description of the Left Ventricular Summit Vascular Triangle

Poster Board Number: C103
Introduction: AAA has separate poster presentation times for odd and even posters.
Odd poster #s – 10:15 am – 11:15 am
Even poster #s – 11:15 am – 12:15 pm

Jakub Batko (Jagiellonian University Medical College), Agata Krawczyk-Ożóg (Jagiellonian University Medical College, University Hospital, Kraków), Jakub Pękala (Jagiellonian University Medical College), Mateusz Hołda (Jagiellonian University Medical College, The University of Manchester, John Paul II Hospital)

Background: Precise anatomical description of coronary vascular topography in the epicardial area adjacent to left atrial appendage (LAA) is crucial for many procedures performed in this region. The aim of this study was to assess the mutual relations between branches of left coronary artery and great cardiac vein in the left ventricular summit region and to determine their neighborhood with the LAA.

Methods: Left coronary artery with its branches, great cardiac vein and selected cardiac structures were segmented from 200 contrast enhanced computed tomography scans and visualized using three dimensional semi-automatic algorithms.

Results: In 97.0% of cases the area between left coronary artery branches and great cardiac vein had triangular-like shape, with area of 253.0±160.0mm2 . The length of the left anterior descending and left circumflex coronary artery sections forming the triangle sides were 24.6±8.8mm and 20.8±6.5mm, respectively. The mean length of the triangle base formed by great cardiac vein was 26.2±11.3mm. On average, 78.8±25,3% of the triangle area was covered by LAA. In 30.5% the ramus intermedius coronary artery intersected the triangle. Within the triangle, the Dg1 was present in 53.0% of hearts, the Dg2 in 4.5%, Mg1 in 29.0% and Mg2 in 3.5%.

Conclusions: This study provided detailed morphometrical description of the left ventricular summit vascular triangle. The proximal parts of the left coronary artery branches are closely adjacent to LAA in most cases. Three-dimensional visualizations of coronary vessels and LAA may lead to increased safety of invasive procedures performed in this region.





Figure 1: Vascular Triangle of Left Atrial Appendage presented on Left Ventricle.; Figure 2: Vascular Triangle of Left Atrial Appendage covered by Left Atrial Appedage.