Regardless, the techniques and diagnostic criteria for constrictive pericarditis have not changed or evolved significantly over time, except for the replacement of previous radioisotopic techniques (131I-polyvinylpyrrolidone, 131I-albumin tests, and 51Cr albumin stool clearance) with Tc-GSA scintigraphy for PLE diagnosis. Here, ALB is linked to constrictive pericarditis.