Creation of a<unk>  is a major surgical procedure. To remove<unk>  fluid, other more minor techniques should be considered first, such as pericardiocentesis.
Pericardial window
Pericardiectomy
Corticotomy
Pericardiocentesis
Cardiomyoplasty
Median sternotomy
Balloon tamponade
Aortic cross-clamp