Which of the following muscle diseases is classified as an ion channel myopathy (channelopathy)?

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Malignant hyperpyrexia (malignant hyperthermia) is characterized by a hypermetabolic state (tachycardia, tachypnea, muscle spasm, and high fever) that is triggered by induction of anesthesia. Several mutations have been identified in these patients, including an L-type voltage-dependent calcium channel. Hence, this disease is classified as a channelopathy.

Which of the Following Muscle Diseases Is Classified as an Ion