Cardiorenal Syndrome: An Unsolved Clinical Problem

Table 1

Cardiorenal syndrome: classification.

CRS type 1	Development of acute kidney injury in the setting of a sudden deterioration of heart function
CRS type 2	Progressive renal dysfunction in the setting of chronic cardiac dysfunction
CRS type 3	Abrupt and primary worsening of renal function leads to acute heart failure
CRS type 4	Primary chronic kidney disease contributes to the progressive development of chronic heart failure
CRS type 5	Combined cardiac and renal dysfunction caused by a systemic illness