A 47 year old
female presents with a history of breathlessness, constipation and abdominal
swelling. There is no significant past medical history and she is not on any
examination you note that the patient looks thin, pulse 90 beats per minute
regular, JVP elevated and the JVP is increased during inspiration. There is
ascites. A chest X-ray is performed and this shows pericardial calcification.
patient what is the likely underlying diagnosis?