<prompt> Rapid X descent unlikely inConstrictive pericarditisCardiac tamponadeRVMIRestrictive cardiomyopathy  <response>: Answer is C RVMI Rapid x descent is rare in RVMI Feature Tamponade Constrictive Pericaditis Restrictive Cardiomyopathy RVMI Prominent x descent Present Usually present Present Rare Prominent y descent Absent Usually present Rare Rare 