Question:medium
Which structure lies posterior to the transverse pericardial sinus?
Which structure lies posterior to the transverse pericardial sinus?
Show Hint
Anterior is the great arteries, inferior is the left atrium - what is left for the back?
Updated On: Jun 24, 2026
- Aorta
- Pulmonary trunk
- SVC
- Left atrium
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: The transverse sinus is the curved tunnel you can pass a finger through behind the great arteries when examining the heart in the pericardial sac.
Step 2: Map its walls. In front sit the ascending aorta and pulmonary trunk together, behind sits the superior vena cava, and below it is the roof of the left atrium.
Step 3: The question asks for the posterior relation, which is the superior vena cava (SVC).
Step 4: The other choices are the anterior (aorta, pulmonary trunk) and inferior (left atrium) boundaries, so they are excluded.
\[\boxed{\text{SVC (superior vena cava)}}\]
Step 2: Map its walls. In front sit the ascending aorta and pulmonary trunk together, behind sits the superior vena cava, and below it is the roof of the left atrium.
Step 3: The question asks for the posterior relation, which is the superior vena cava (SVC).
Step 4: The other choices are the anterior (aorta, pulmonary trunk) and inferior (left atrium) boundaries, so they are excluded.
\[\boxed{\text{SVC (superior vena cava)}}\]
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