Hepatorenal syndrome

Hepatorenal syndrome (HRS) is a dangerous condition that occurs with the progression of end-stage liver failure. It is a complex pathological process characterized by deterioration of renal function against the background of liver cirrhosis or acute liver inflammation. The underlying mechanism is impaired renal perfusion, which leads to acute renal injury. HRS is often considered a consequence of the activation of systems such as the renin-angiotensin, which contributes to vascular changes and hemodynamic disturbances in organs, particularly the kidneys. One of the main clinical manifestations is progressive renal failure, which, if the necessary medical measures are not taken, can lead to death.

History of the disease and interesting historical facts

Hepatorenal syndrome was first described in the 1950s. Official recognition of HRS as a distinct disorder was achieved in the 1980s when physicians began to recognize the relationship between liver and kidney failure. Interestingly, clinicians had previously been unable to explain the deterioration of kidney function in patients with liver disease. Major advances in understanding HRS occurred after the discovery of mechanisms related to endocrine and vascular regulation. In recent decades, research findings such as the use of various vascular techniques and therapies have significantly changed the approach to the treatment and diagnosis of this syndrome.

Epidemiology

According to the World Health Organization, hepatorenal syndrome is observed in 20-30% patients with decompensated liver cirrhosis. The rates vary depending on the stage of the disease, as well as on the combination of associated factors. About 50% patients with acute liver failure, especially against the background of viral hepatitis, develop HRS. Given the high incidence rate, HRS remains a pressing health problem in different countries.

Genetic predisposition to this disease

Scientific studies demonstrate that certain genetic mutations may increase the risk of developing hepatorenal syndrome. In particular, polymorphisms of genes associated with metabolism and regulation of vascular tone, such as ACE, AGT and others, have been associated with a predisposition to HRS. However, the need for further research to better understand the genetics of HRS remains relevant, since at present hereditary factors cannot be singled out as the only explanation for the occurrence of the syndrome.

Risk factors for the development of this disease

Hepatorenal syndrome can develop against the background of several predisposing factors, including:

• Liver cirrhosis as the most common cause, including alcoholic and viral hepatitis.
• Use of nonsteroidal anti-inflammatory drugs and diuretics, which may worsen renal perfusion.
• Infections, including peritonitis, which can trigger activation of systems leading to deterioration of kidney function.
• Concomitant conditions such as heart failure and acute lung disease.

Diagnosis of this disease

Diagnosis of hepatorenal syndrome includes an assessment of the clinical picture and laboratory tests, among which the main symptoms are:

• Increased serum creatinine levels.
• Decreased diuresis (less than 500 ml/day).
• No evidence of urinary tract obstruction based on ultrasound or other imaging studies.

Laboratory tests include liver function tests, sodium, potassium, and other electrolytes, and tests for viral hepatitis. Radiological tests such as renal ultrasound can help rule out obstruction, and differential diagnosis with other types of renal failure such as acute tubular injury is key.

Treatment

Treatment of hepatorenal syndrome consists of a set of measures aimed at stabilizing kidney function and improving liver condition. As a general approach, it is recommended:

• Supportive therapy with the same principles as in the treatment of liver failure.
• Pharmacological treatment, including drugs that improve microcirculation and intrarenal pressure.
• Surgical approaches may include liver transplantation, which is the only definitive treatment option in severe cases.
• Other treatments, such as parenteral nutrition and use of diuretics, should be carefully monitored to minimize the risk of worsening renal function.

List of medications used to treat this disease

The most common medications used to treat HRS include:

• Dopamine agonists (eg, dopamine).
• Nitroglycerin to improve renal perfusion.
• Specific correspondents (eg, intramuscular terlecin and other similar drugs) to reduce systemic vascular resistance.

Disease monitoring

Because hepatorenal syndrome is a serious condition, monitoring includes:

• Regular laboratory tests to monitor creatinine levels.
• Continuous assessment of electrolyte balance.
• Monitoring blood pressure and liver function.

The prognosis depends on the characteristics of the underlying disease and the presence of associated factors. Without adequate treatment, HRS can lead to significant complications, including death.

Age-related features of the disease

Hepatorenal syndrome may manifest itself differently in different age groups. In elderly patients, the risk of developing HRS is significantly higher, which is associated with the presence of concomitant diseases and changes in metabolism. At the same time, acute episodes caused by severe infections or intoxications are more often observed in young patients. In this context, age-related features require an individual approach to diagnosis and treatment.

Questions and Answers

• What is hepatorenal syndrome? Hepatorenal syndrome is a syndrome characterized by deterioration of renal function against the background of liver failure.
• What are the main causes of the development of GRS? The main causes include liver cirrhosis, acute viral hepatitis and other concomitant diseases.
• How is HRS diagnosed? Diagnosis includes tests for creatinine levels, liver function tests, and ruling out other causes of kidney failure.
• What is the most effective treatment for HRS? The most effective treatment involves improving liver function and using drugs that improve vascular perfusion.
• What is the prognosis and possible complications of HRS? The prognosis depends on the sequence of treatment and the underlying disease; in the absence of adequate therapy, the risk of death is high.

Advice from Dr. Oleg Korzhikov

Dr. Oleg Korzhikov notes that it is important to monitor your health and undergo regular medical examinations, especially for those who have predisposing factors (such as cirrhosis of the liver or chronic diseases). Prevention of infections and control of the level of stress on the liver and kidneys are also important. If you have doubts or alarming symptoms, do not delay contacting a specialist. Characteristic symptoms, such as sudden changes in diuresis and general well-being, can serve as a signal for immediate medical intervention.