Introduction: Acute kidney injury (AKI) is a frequent and life-threatening complication of cirrhosis, with management often complicated by inaccurate assessment of intravascular volume and the presence of cirrhotic cardiomyopathy (CCM). This prospective study evaluated whether point-of-care ultrasound (POCUS)–guided volume management improves AKI outcomes and examined the prognostic impact of CCM on renal recovery, need for renal replacement therapy (RRT), and survival.
Introduction:
Acute kidney injury (AKI) is a frequent and life-threatening complication of cirrhosis, with management often complicated by inaccurate assessment of intravascular volume and the presence of cirrhotic cardiomyopathy (CCM). This prospective study evaluated whether point-of-care ultrasound (POCUS)–guided volume management improves AKI outcomes and examined the prognostic impact of CCM on renal recovery, need for renal replacement therapy (RRT), and survival.
Why was this study needed?
. Volume assessment in cirrhosis is often unreliable using clinical examination alone.
. Inappropriate fluid management can worsen AKI or precipitate volume overload.
. The impact of cirrhotic cardiomyopathy on AKI recovery and long-term outcomes remains poorly defined.
. POCUS offers real-time bedside assessment of cardiac function and volume status but lacks robust prospective outcome data.
Results:
Among 372 ICU patients with cirrhosis and AKI, nearly 80% were initially hypovolemic. Serial POCUS-guided assessment enabled individualized fluid management, with pre-renal AKI identified in 62% of patients, while HRS-AKI accounted for 16%. Cirrhotic cardiomyopathy was present in 35% overall but was markedly more common in HRS-AKI (75%). Higher baseline mean arterial pressure and cardiac index independently predicted AKI reversal within 7 days. Only 14% required renal replacement therapy, while pulmonary edema occurred in fewer than 5% despite active volume resuscitation. Importantly, CCM emerged as a strong independent predictor of both 90-day and 1-year mortality, and lower cardiac index and impaired diastolic function (reduced septal e′ velocity) independently predicted the need for RRT.
Clinical Impact:
This study supports incorporating POCUS into routine bedside management of cirrhotic patients with AKI to optimize volume resuscitation while minimizing fluid-related complications. Assessment for CCM should become part of AKI evaluation, as underlying cardiac dysfunction identifies patients at high risk for persistent renal failure, dialysis requirement, and death. Early recognition may facilitate more individualized hemodynamic management and prognostic stratification.
Bottom Line:
POCUS-guided volume management improves individualized treatment of AKI in cirrhosis, while cirrhotic cardiomyopathy is a major predictor of renal non-recovery, dialysis requirement, and short- and long-term mortality.
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