LDH isoenzyme testing is now used less often due to the prominence of which biomarker?

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Multiple Choice

LDH isoenzyme testing is now used less often due to the prominence of which biomarker?

Explanation:
Cardiac troponin has surpassed LDH isoenzymes as the preferred biomarker for myocardial injury because it is highly specific to cardiac muscle and more sensitive than LDH patterns. LDH isoenzyme testing could indicate myocardial infarction through a pattern shift, but LDH is released from many tissues, making it less specific. Troponin I or T rises quickly after injury and remains elevated, providing earlier and more accurate detection of myocardial damage. The other markers listed are not specific to the heart: ALT signals liver injury, PSA relates to the prostate, and amylase relates to the pancreas or salivary glands.

Cardiac troponin has surpassed LDH isoenzymes as the preferred biomarker for myocardial injury because it is highly specific to cardiac muscle and more sensitive than LDH patterns. LDH isoenzyme testing could indicate myocardial infarction through a pattern shift, but LDH is released from many tissues, making it less specific. Troponin I or T rises quickly after injury and remains elevated, providing earlier and more accurate detection of myocardial damage. The other markers listed are not specific to the heart: ALT signals liver injury, PSA relates to the prostate, and amylase relates to the pancreas or salivary glands.

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