Review Article

The Cardiorenal Syndrome: Making the Connection

Table 2

ADQI classification system of the cardiorenal syndrome [2].

Inciting eventSecondary disturbance

CRS type 1Acute decompensated heart failureAcute kidney injury
CRS type 2Chronic heart failureChronic kidney disease
CRS type 3Acute kidney injuryAcute heart failure
CRS type 4Chronic kidney diseaseChronic heart failure
CRS type 5Codevelopment of heart failure and chronic kidney disease