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What is the significance of elevated serum levels of troponin?

A.

This intracellular substance can leak into the blood with cardiac cellular injury or death.

B.

Elevated serum levels of troponin occur because of sustained glycogenolysis.

C.

This substance is elevated when a patient has acute tubular necrosis.

D.

Serum elevation of this acute phase reactant occurs because of tissue injury.

Answer and Explanation

The Correct Answer is A

Choice A rationale

 

Elevated serum levels of troponin indicate cardiac cellular injury or death. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, such as during a myocardial infarction.

 

Choice B rationale

 

Sustained glycogenolysis does not cause elevated troponin levels. Glycogenolysis is the breakdown of glycogen to glucose, primarily occurring in the liver and muscles, not related to troponin release.

 

 

Choice C rationale

 

Acute tubular necrosis does not elevate troponin levels. This condition affects the renal tubules and is typically indicated by elevated creatinine and BUN levels.

 

Choice D rationale

 

Troponin is not an acute phase reactant. Acute phase reactants are proteins whose levels change in response to inflammation, such as C-reactive protein (CRP), not troponin.


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View Related questions

Correct Answer is A

Explanation

Choice A rationale

Hypersplenism is a condition often associated with cirrhosis, where the spleen becomes overactive. This leads to the destruction of blood cells, causing anemia (low red blood cells), leukopenia (low white blood cells), and thrombocytopenia (low platelets).

Choice B rationale

Peptic ulcer disease primarily affects the stomach and duodenum, leading to ulcers and bleeding. It does not typically cause anemia, leukopenia, and thrombocytopenia in the context of cirrhosis.

Choice C rationale

Cholecystitis is the inflammation of the gallbladder, usually due to gallstones. It does not cause the blood cell abnormalities seen in cirrhosis.

Choice D rationale

Esophageal varices are swollen veins in the esophagus that develop due to portal hypertension in cirrhosis. While they can cause bleeding, they do not directly cause anemia, leukopenia, and thrombocytopenia.

Correct Answer is A

Explanation

Choice A rationale

A hypertensive crisis is characterized by severely elevated blood pressure, which can cause severe headache and blurred vision due to increased intracranial pressure.

Choice B rationale

Migraines can cause severe headaches and visual disturbances, but in a patient with a history of hypertension, a hypertensive crisis is more likely.

Choice C rationale

Sinus infections can cause headaches and facial pain, but not typically blurred vision.

Choice D rationale

Gastroenteritis causes gastrointestinal symptoms like diarrhea and vomiting, not headaches and blurred vision.

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