Cardiorenal syndrome types I, II, III, IV and V

Cardiorenal syndrome types I, II, III, IV and V

Cardiorenal syndrome has been classified into types I, II, III, IV and V  by the Consensus Conference of the Acute Dialysis Quality Initiative [1]. The table has been cited in an American Heart Association Scientific Statement [2]. 
Type I: Acute cardiorenal syndrome is acute kidney injury (AKI) which is hemodynamically mediated, secondary to acute cardiac decompensation.
Type II: Chronic cardiorenal syndrome is secondary to chronic heart diseases like cardiomyopathy, valvular heart disease or coronary artery disease.
Type III: Acute renocardiac syndrome is acute worsening of renal function leading to heart failure as in acute glomerulonephritis which can cause flash pulmonary edema.
Type IV: Chronic renocardiac syndrome is cardiac dysfunction secondary to chronic kidney disease with left ventricular hypertrophy, anemia uremia and calcification of coronaries with atherosclerosis.
Type V: Secondary cardiorenal syndrome in which same pathological factor causes injury to both the heart and the kidneys as in diabetes mellitus and sepsis.

References

1. Ronco C, McCullough P, Anker SD, Anand I, Aspromonte N, Bagshaw SM, Bellomo R, Berl T, Bobek I, Cruz DN, Daliento L, Davenport A, Haapio M, Hillege H, House AA, Katz N, Maisel A, Mankad S, Zanco P, Mebazaa A, Palazzuoli A, Ronco F, Shaw A, Sheinfeld G, Soni S, Vescovo G, Zamperetti N, Ponikowski P; Acute Dialysis Quality Initiative (ADQI) consensus group. Cardio-renal syndromes: report from the consensus conference of the acute dialysis quality initiative. Eur Heart J. 2010 Mar;31(6):703-11. 
2. Rangaswami J, Bhalla V, Blair JEA, Chang TI, Costa S, Lentine KL, Lerma EV, Mezue K, Molitch M, Mullens W, Ronco C, Tang WHW, McCullough PA; American Heart Association Council on the Kidney in Cardiovascular Disease and Council on Clinical Cardiology. Cardiorenal Syndrome: Classification, Pathophysiology, Diagnosis, and Treatment Strategies: A Scientific Statement From the American Heart Association. Circulation. 2019 Apr 16;139(16):e840-e878.