Korean Circ J.  2021 Aug;51(8):656-667. 10.4070/kcj.2021.0996.

Pathophysiology of Cardiorenal Syndrome and Use of Diuretics and Ultrafiltration as Volume Control

• Lim SY
• Kim S

• KMID: 2519147
• DOI: http://doi.org/10.4070/kcj.2021.0996

Abstract

Acute or chronic dysfunction of the heart or kidneys can cause dysfunction of other organs. This interaction between the heart and kidneys is characterized as cardiorenal syndrome (CRS). Recently, a preponderance of data indicated that venous congestion plays an important role in the combination of renal and cardiac diseases. This review aims to focus on the pathophysiology of venous congestion that leads to renal impairment in heart failure and the use of diuretics or ultrafiltration as decongestive therapy in CRS. We found that although clinical studies have confirmed that decongestive therapy has a definite role in decreasing volume overload and the consequent symptom improvement in patients with CRS, the impact of diuretics or ultrafiltration on the improvement of kidney function or mortality remains uncertain. A precise assessment of volume status is required to determine the adequacy of decongestion. Objective measures of renal venous congestion may be a future metric to assess the adequacy of the diuretic response in patients and guide therapeutic decision making.

Keyword

Cardiorenal syndrome; Heart failure; Diuretics; Ultrafiltration

Figure

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  Figure 1 The normal (upper) and increased venous congestion (lower) in renal Doppler evaluation.

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