Malignant hyperthermia is caused by –
**Core Concept**
Malignant hyperthermia is a life-threatening medical emergency triggered by certain anesthetic agents. It involves an abnormal **skeletal muscle** response, leading to excessive heat production. The underlying cause is often related to **genetic mutations** affecting **calcium channels**.
**Why the Correct Answer is Right**
The correct answer is related to the genetic predisposition and the specific **anesthetic agents** that trigger malignant hyperthermia, such as **halogenated inhalational anesthetics** and **succinylcholine**. These agents can cause an abnormal release of **calcium** from the **sarcoplasmic reticulum**, leading to sustained muscle contraction and excessive heat production.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because it does not specify the correct trigger or genetic component.
**Option B:** This option is also incorrect as it does not accurately describe the pathophysiology.
**Option C:** Incorrect due to lack of specificity regarding the anesthetic agents involved.
**Clinical Pearl / High-Yield Fact**
Malignant hyperthermia is a medical emergency requiring immediate attention, and **dantrolene** is the specific treatment used to stop the process.
**Correct Answer:** D. Genetic mutation affecting calcium release from sarcoplasmic reticulum.