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Related Concept Videos

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Myasthenia Gravis: Overview and Treatment01:20

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
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Skeletal Muscle Relaxants: Adverse Effects01:21

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Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
Unlike...
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Lipid-Lowering Drugs: Statins and Miscellaneous Agents01:20

Lipid-Lowering Drugs: Statins and Miscellaneous Agents

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Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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Statin-induced debilitating weakness and myopathy.

Besim Ademi1, Jared Folker2, W Benjamin Rothwell3

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Long-term statin use, like atorvastatin, can rarely cause drug-related myonecrosis. Prompt treatment is crucial for muscle recovery, though full function may not be regained.

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Area of Science:

  • Cardiology
  • Neurology
  • Rheumatology

Background:

  • Statins are widely prescribed for atherosclerotic disease prevention.
  • Myalgias are common, typically mild side effects of statin therapy.

Observation:

  • This report details a rare case of drug-related myonecrosis.
  • The condition developed after prolonged use of atorvastatin.

Findings:

  • Drug-related myonecrosis requires prompt recognition and treatment.
  • Treatment involves high-dose steroids, with escalation to methotrexate, IVIG, or rituximab for refractory cases.
  • Monitoring creatine kinase (CK) and transaminases guides treatment and indicates cessation of muscle necrosis.

Implications:

  • Early intervention is key to managing statin-induced myonecrosis.
  • Complete functional recovery is not always achieved, and treatment can be prolonged.
  • This case highlights a severe adverse effect of statin therapy requiring vigilant patient monitoring.