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Muscle death, or rhabdomyolysis, is a serious condition caused by a direct or indirect muscle injury. It occurs when muscle fibres die and release their contents into the bloodstream. This can lead to serious complications such as kidney failure and cardiac arrest, and even cause death in rare cases. Rhabdomyolysis can be caused by intense exercise, illegal drugs, alcohol, some medications, injuries, illnesses, and genetic conditions. It is important to seek early treatment to prevent life-threatening complications and increase the chances of a full recovery. Other causes of muscle death include muscle atrophy, disuse, malnutrition, age, genetics, and medical conditions such as muscular dystrophy.
| Characteristics | Values |
|---|---|
| Muscle death condition | Rhabdomyolysis |
| Cause | Direct or indirect muscle injury, intense exercise, illegal drugs, alcohol, some medicines, injuries, illnesses, crush injury, long-lasting muscle compression, immobilization after a fall, lying unconscious on a hard surface, malnutrition, age, genetics, lack of physical activity, certain medical conditions, nerve problems, neurogenic conditions, disuse of muscles, stroke, genetic disorder, muscular dystrophy, Charcot-Marie-Tooth disease, ALS, Guillain-Barre syndrome, carpal tunnel syndrome, spinal cord injury, multiple sclerosis, compartment syndrome |
| Symptoms | Muscle pain, swelling, weakness, dark urine, fatigue, muscle pain, reduced muscle mass, limb being smaller than the other, numbness, tingling in limbs, trouble walking or balancing, difficulty swallowing or speaking, muscle stiffness, muscle wasting, muscle thinning, muscle weakness, difficulty moving, frequent falls, trouble rising from the floor, trouble running, jumping or climbing stairs, waddling gait, large calf muscles, learning or behavior-related challenges, delayed growth, stiff joints, trouble bending elbows, muscle wasting in shoulders, upper arms and calves, heart conditions, mild hearing loss, mild disability, serious health challenges, irregular heartbeat, cardiac arrest |
| Treatment | Surgery, IV fluids, medicines, dialysis, staying hydrated, taking breaks in the shade, removing extra clothes, immersing the body in cold water, exercise, healthy diet |
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Rhabdomyolysis
The classic symptoms of rhabdomyolysis include muscle pain in the shoulders, thighs, or lower back, dark urine, and feelings of weakness or fatigue. However, it is important to note that half of the people with rhabdomyolysis may not experience any muscle-related symptoms. Other possible symptoms include muscle stiffness, swelling, cramping, and changes to urine. Symptoms typically appear within 24 to 72 hours after exercise or an injury, but they may not manifest until several days after the initial muscle injury.
The causes of rhabdomyolysis vary and can be traumatic or non-traumatic. Traumatic causes include crush injuries, such as those sustained in vehicle accidents, falls, or building collapses. Prolonged muscle compression, such as from immobilization after a fall or lying unconscious on a hard surface, can also lead to rhabdomyolysis. Non-traumatic causes include extreme exercise, such as running a marathon or participating in high-intensity resistance training. Other causes include the use of illegal drugs like cocaine, amphetamines, or heroin, side effects of certain medications like cholesterol-lowering drugs (statins), and alcohol consumption. People with underlying health conditions, older adults, those with diabetes, and individuals who engage in extreme sports or substance use are at a higher risk of developing rhabdomyolysis.
Early diagnosis and treatment of rhabdomyolysis are crucial for a successful outcome and full recovery. Blood tests for creatine kinase (CK) levels, a product of muscle breakdown, are used to diagnose rhabdomyolysis. Urine tests for myoglobin, a protein released from damaged muscles, can also aid in diagnosis, although they are not considered as accurate as blood tests. Treatment typically involves hospitalization, administration of intravenous (IV) fluids to maintain urine production and prevent kidney failure, and management of electrolyte abnormalities to protect the heart and other organs. In some cases, surgery or dialysis may be necessary.
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Muscle atrophy
Neurogenic atrophy is caused by nerve problems or diseases that impact the musculoskeletal or nervous system. This type of atrophy can occur more suddenly and may be more severe. Examples include amyotrophic lateral sclerosis (ALS), damage to a single nerve, or inherited diseases such as Charcot-Marie-Tooth disease. Treatment for neurogenic atrophy may include physical therapy, ultrasound therapy, or, in some cases, surgery.
Pathologic atrophy is associated with ageing, starvation, and diseases such as Cushing's disease, which is caused by the over-administration of corticosteroids. Malnutrition can also lead to muscle atrophy, as the body first experiences fat loss, but prolonged starvation can result in muscle atrophy. Nutritional therapy can help reverse atrophy caused by malnutrition.
Certain medications are known to cause muscle atrophy, particularly those with a direct effect on muscles, such as glucocorticoids, which cause glucocorticoid myopathy. Other medications toxic to muscles, such as doxorubicin, can also cause atrophy. In addition, muscle atrophy can be caused by damage to neurons in the brain or spinal cord, resulting in localized muscle atrophy and weakness or paralysis, as seen in strokes or spinal cord injuries. More widespread damage, such as traumatic brain injury or cerebral palsy, can lead to generalized muscle atrophy.
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Muscular dystrophy
There are several types of muscular dystrophy, each with distinct symptoms and age of onset. For instance, Duchenne muscular dystrophy, which primarily affects boys, can manifest in early childhood with symptoms like delayed walking, frequent falls, and difficulty with activities such as running, jumping, or climbing stairs. Becker muscular dystrophy, the second most common type, can exhibit symptoms between the ages of 5 and 60, but they typically emerge during the teenage years. It is also more prevalent in boys, although girls may experience milder symptoms.
Another type, Emery-Dreifuss muscular dystrophy, predominantly impacts male children and young adults. It causes muscle weakness in the shoulders, upper arms, and shins, and can lead to heart conditions. Facioscapulohumeral muscular dystrophy (FSHD) affects the muscles in the face, shoulders, and upper arms, with symptoms typically appearing before age 20. Limb-girdle muscular dystrophy affects the muscles in the upper arms, upper legs, shoulders, and hips, and can lead to minor disabilities or serious difficulties in using the limbs for everyday activities.
Myotonic dystrophy, the most frequently diagnosed type in adults, affects both men and women equally. It causes difficulty in relaxing muscles after use and can impact the heart, lungs, and endocrine system. Congenital muscular dystrophies (CMD) are a group of muscular dystrophies present from birth or near birth, causing overall muscle weakness and possible joint stiffness or looseness. Oculopharyngeal muscular dystrophy (OPMD) weakens the muscles in the eyelids and throat, often resulting in droopy eyelids and swallowing difficulties, with symptoms usually appearing in middle age.
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Extreme exercise
Rhabdomyolysis can occur when someone jumps into an intense exercise program too quickly, not allowing muscles time to heal between workouts. It is often associated with high-intensity exercises such as marathon running, CrossFit, spinning, and high-intensity interval training (HIIT). Extreme muscle strain, especially in those who are overweight or extremely muscular, can also lead to rhabdomyolysis.
Symptoms of rhabdomyolysis include muscle pain, soreness, cramping, stiffness, weakness, and dark-coloured urine. These symptoms typically appear within 24 to 72 hours after an intense workout. However, it can be challenging to distinguish these signs from typical post-workout fatigue. Therefore, it is crucial to listen to your body and slow down when necessary.
The condition is treatable, and early diagnosis and treatment are essential for a full recovery. Staying well-hydrated is critical, as it helps flush out the byproducts of working muscles. In more severe cases, hospitalisation may be required for intravenous (IV) fluid administration and, in rare instances, dialysis to support kidney function.
While extreme exercise can lead to rhabdomyolysis and potentially cause muscle death, it is important to note that exercise is generally one of the best things for overall health. Moderation and listening to your body's needs are key to maintaining a healthy balance.
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Compartment syndrome
Acute compartment syndrome is a medical emergency. It is usually caused by a severe injury and is extremely painful. Without prompt treatment, acute compartment syndrome can lead to ischemia and eventually, necrosis (tissue death), causing permanent damage. It can be fatal if not treated immediately.
Chronic compartment syndrome, also known as exertional compartment syndrome, is usually not a medical emergency. It is most often caused by athletic exertion and is reversible with rest. Chronic compartment syndrome typically builds up slowly over time, especially after intense physical activities or exercise. It can, however, be extremely painful.
The classic sign of acute compartment syndrome is severe pain, especially when the muscle within the compartment is stretched. The pain is more intense than what would be expected from the injury itself. Using or stretching the involved muscles increases the pain. There may also be tingling or burning sensations (paresthesia) in the skin. The muscle may feel tight or full. Numbness or paralysis are late signs of compartment syndrome. This usually indicates permanent tissue injury.
If conservative measures fail, surgery may be an option for treating compartment syndrome. The operation is designed to open the fascia so there is more room for the muscles to swell.
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Frequently asked questions
Rhabdomyolysis is a serious condition caused by a direct or indirect muscle injury. It happens when muscle fibres die and release their contents into the bloodstream.
Symptoms include muscle pain in the shoulders, thighs or lower back, muscle weakness, and tea-coloured urine.
Rhabdomyolysis can be caused by intense exercise, illegal drugs, alcohol, some medicines, injuries, illnesses, and genetic disorders.
Treatment includes IV fluids, medicines, surgery, and dialysis.
Muscle atrophy is the wasting or thinning of muscle mass. It can be caused by muscle disuse, malnutrition, age, genetics, lack of physical activity, or certain medical conditions.
