Posterior to transverse pericardial sinus is:: (A) Aoa, (B) Pulmonary trunk, (C) SVC, (D) Left atrium
Answer is C. * Transverse pericardial sinus lies between the aoa and pulmonary trunk anteriorly and the superior vena cava posteriorly. Boundaries :- Below-left atrium Above - bifurcation of pulmonary trunk Behind(posterior)- superior vena cava In front- ascending aoa and pulmonary trunk * Clinically, in cardiac surgery, temporary ligature or clamp is passed through transverse pericardial sinus to stop or dive the circulation of blood in large aeries .