Acute Cardiorenal Syndrome (Type 1): Acute worsening of cardiac function leading to kidney dysfunction

Chronic Cardiorenal Syndrome (Type 2): Chronic abnormalities in cardiac function leading to kidney dysfunction

Acute Renocardiac Syndrome (Type 3): Acute worsening of kidney function causing cardiac dysfunction

Chronic Renocardiac Syndrome (Type 4): Chronic abnormalities in kidney function leading to cardiac disease

Secondary Cardiorenal Syndromes (Type 5): Systemic conditions causing simultaneous dysfunction of the heart and kidney

Abbreviation: ADQI, Acute Dialysis Quality Initiative