<prompt> Square root sign is characteristic ofDilated cardiomyopathyRestrictive cardiomyopahtyConstrictive pericarditisContractile dysfuncation seen in which type of cardiomyopathy?  <response>: square root sign is a charecteristic feature of Constrictive pericarditis Dip plateau pattern or square root sign: Early diastolic filling of the ventricles is unimpeded and abnormally rapid, but late diastolic filling is abbreted and halts abruptly when total cardiac volume expands to the volume limit set by the stiff pericardium Ref Harrison 20th edition pg 1436 