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Related Concept Videos

Dialysis01:27

Dialysis

302
Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
302
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

422
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
422
Heart Failure Drugs: Diuretics01:22

Heart Failure Drugs: Diuretics

370
Heart failure and kidney perfusion are interconnected in a complex way. Reduced renal perfusion and venous congestion are two significant factors that contribute to renal dysfunction in heart failure. The kidneys, primarily responsible for fluid balance in the body, are adversely affected due to compromised cardiac output and increased venous pressure. In response to reduced renal perfusion, the kidneys activate neurohumoral mechanisms to restore balance. However, these mechanisms can be...
370

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Cardiac Surgery-Associated Acute Kidney Injury.

Florian G Scurt1, Katrin Bose2, Peter R Mertens1

  • 1Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.

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|May 1, 2024
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Summary
This summary is machine-generated.

Acute kidney injury (AKI) after cardiac surgery is common and serious. Early recognition of risk factors and improved biomarkers are crucial for diagnosis, prevention, and management of cardiac surgery-associated AKI (CSA-AKI).

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Area of Science:

  • Nephrology
  • Cardiology
  • Critical Care Medicine

Background:

  • Acute kidney injury (AKI) is a frequent and severe complication following cardiac surgery, significantly increasing patient morbidity and mortality.
  • The Kidney Disease Improving Global Outcomes (KDIGO) criteria, based on serum creatinine and urine output, are standard for classifying cardiac surgery-associated AKI (CSA-AKI).
  • Numerous pre-, intra-, and postoperative factors contribute to CSA-AKI development, necessitating early identification and intervention.

Purpose of the Study:

  • To provide a comprehensive review of cardiac surgery-associated AKI (CSA-AKI).
  • To discuss the pathogenesis, risk factors, diagnostic challenges, and emerging biomarkers for CSA-AKI.
  • To outline current and future strategies for prevention and management of CSA-AKI.

Main Methods:

  • Comprehensive literature review focusing on CSA-AKI.
  • Analysis of current diagnostic criteria and their limitations, particularly serum creatinine's accuracy in the perioperative setting.
  • Evaluation of existing and novel biomarkers for AKI detection.

Main Results:

  • Serum creatinine is an unreliable marker for kidney function in the perioperative period of cardiothoracic surgery.
  • There is a critical need for more accurate biomarkers to reflect AKI pathophysiology.
  • The tissue inhibitor of metalloproteinase-2 and insulin-like growth factor binding protein 7 ratio is one of the few biomarkers with acceptable sensitivity and specificity, though others are still needed.

Conclusions:

  • Effective management of CSA-AKI requires addressing its complex risk factors and improving diagnostic accuracy.
  • Development and validation of sensitive and specific biomarkers are essential for early CSA-AKI diagnosis and timely intervention.
  • A multidisciplinary approach encompassing prevention, early diagnosis, and tailored treatment is vital to mitigate the impact of CSA-AKI.