What's the difference between the icu (intensive care unit), and a ccu (critical care unit)?

Cardiac vs medical : In most cased ccu is a"cardiac care unit" usually taking care of critically ill cardiac patients such as mis, severe heart failure. Icu "intensive care units" usually have critically ill general medical patients such as pneumonias.

None: These are terms that essentially describe the same high level care floor/unit for the critically ill.

A little difference: Icu- generally refers to all critically ill patients, post surgery, on ventilators etc whereas coronary care unit- ccu exclusively heart patients are taken care of.

Type of patient: Ccu generally refers to a coronary care unit which is a subtype of intensive care unit that specializes more in cardiac disease and post-operative open heart patients. You'll see several abbreviations such as nicu (neurological intensive care unit) or sometimes (neonatal intensive care unit) sicu (surgical intensive care unit).

Means same: Both are same, no practical difference. Ccu is used in uk hospitals . Ccu also means coronary care unit for sick heart patients

ICU/CCU: Icu and critical care unit are the same , but in some hospitals ccu is cardiac care unit. Then : sicu is surgical icu, micu is medical ICU , nicu is neuro ICU or sometimes neonatal icu, ....