Table 3.

Definition and classification of cardiorenal syndromes (28)

Cardiorenal syndromes general definition: Disorders of the heart and kidneys whereby acute or chronic dysfunction in one organ may induce acute or chronic dysfunction of the other.
Acute cardiorenal syndrome (type 1): Acute worsening of the cardiac function leading to renal dysfunction.
Chronic cardiorenal syndrome (type 2): Chronic abnormalities in cardiac function leading to renal dysfunction.
Acute renocardiac syndrome (type 3): Acute worsening of renal function causing cardiac dysfunction.
Chronic renocardiac syndrome (type 4): Chronic abnormalities in renal function leading to cardiac disease.
Secondary cardiorenal syndrome (type 5): Systemic conditions causing simultaneous dysfunction of the heart and the kidney.