transverse sinus of pericardium (Theile canal)

Introduction

A transversely running passage in the pericardial sac between the origins of the great vessels.

Boundaries:

• anteriorly by the serous pericardium covering the posterior aspect of the pulmonary trunk & aorta
• posteriorly by the visceral pericardium covering the atria

This pericardial sinus is formed as a consequence of the folding of the primordial heart tube, partially approximating the great venous & arterial vessels.

More general terms

• heart structure
• sinus

Additional terms

• layers of pericardium
• oblique sinus of pericardium

Component of

• pericardium