Rhabdomyolysis

Definition

Rhabdomyolysis occurs when skeletal muscles are damaged and release myoglobin into the bloodstream. Myoglobin is an iron-containing pigment that can cause severe damage to the kidneys.

Causes

Rhabdomyolysis results from any condition that causes significant muscle damage. These include:

  • Excessive muscle activity
  • Certain muscle diseases
  • Severe muscle injuries, such as a crush injury
  • Overuse of alcohol or illicit drugs
  • Uncontrolled seizure disorder
  • Hypothermia
  • Contact with an electrical current
  • Toxins, such as snake or spider venom
  • Extensive surgical procedures using large, muscle-dividing incisions—rare

Risk Factors

Factors that may increase the risk of muscle damage include:

  • Extreme exertion, such as running a marathon
  • Heat stroke
  • Use of some prescription drugs
  • Alcohol or drug abuse
  • Severe seizures or convulsions

Symptoms

The most common symptoms include:

  • Dark urine—brown or red in color
  • Muscle pain
  • Muscle weakness

Other symptoms include:

  • Muscle swelling
  • Back pain
  • Nausea and vomiting

In severe cases, rhabdomyolysis may result in:

  • Kidney damage or failure
  • Multi-organ failure
  • Abnormal heartbeat, also known as arrhythmia
Anatomy of the Kidney
Glomerulonephritis
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Diagnosis

The doctor will ask about your symptoms and medical history. A physical exam will be done. Tests may include:

Your bodily fluids may be tested. This can be done with:

  • Urine tests
  • Blood tests

The activity of your muscles and heart may be tested. This can be done with:

Treatment

Treatment may include:

Hydration

Giving large amounts of fluid is the main treatment. Fluids are usually given by IV. Hydration helps to quickly flush myoglobin out of the kidneys to restore their function.

Medication

Bicarbonate may be used to minimize myoglobin's toxic effects.

Dialysis

Dialysis is a procedure that uses an artificial kidney machine to filter blood. The clean blood is then returned to your body.

Prevention

Steps for prevention include:

  • Drink plenty of fluids when:
    • Exercising
    • Sitting or working in hot, humid weather
  • Avoid overuse of alcohol
  • Avoid illicit drugs

Revisions

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One of the most important things you can do to lower your risk of stroke is to keep your blood pressure in check with exercise, stress management and reducing your intake of salt and alcohol.