Large or giant atrium due to impaired left ventricular filling.
"What are the possible diagnoses that need to be considered in a case of constrictive pericarditis?"
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: "What are the possible diagnoses that need to be considered in a case of constrictive pericarditis?" [/INST] \n Large or giant atrium due to impaired left ventricular filling.</s>