Cardiorenal syndrome is a pathophysiologic disorder of the heart and kidney where the acute or chronic deterioration of one organ results in the acute or chronic deterioration of the other. This syndrome has been classified into five types: Type 1: acute kidney injury stemming from acute cardiac disease Type 2: CKD due to chronic cardiac disease Type 3: acute cardiac disease as a result of acute kidney disease Type 4: chronic cardiac decompensation from CKD Type 5: heart and kidney dysfunction due to other acute or chronic systemic disorders (such as sepsis)