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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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IntroductionThe management of Acute Coronary Syndrome (ACS) aims to minimize myocardial damage, preserve myocardial function, and prevent complications.Initial ManagementInpatient management involves continuous cardiac monitoring, preferably in an ICU, focusing on blood pressure, serum sodium, potassium, and creatinine levels, and urine output. Ongoing pharmacologic management is crucial for stabilizing the patient.Supplemental Oxygen: Administer supplemental oxygen if oxygen saturation is...
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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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In-Hospital Mortality in Hemorrhagic Myocardial Infarction.

Keyur P Vora1,2, Ankur Kalra1,3, Chirag D Shah1

  • 1Indiana University School of Medicine, Indianapolis.

NEJM Evidence
|August 26, 2025
PubMed
Summary
This summary is machine-generated.

Post-PCI troponin kinetics can identify hemorrhagic myocardial infarction (MI), a condition linked to increased in-hospital mortality after ST-elevation myocardial infarction (STEMI). This diagnostic tool aids in predicting adverse outcomes in STEMI patients.

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Area of Science:

  • Cardiology
  • Biomarkers
  • Medical Diagnostics

Background:

  • Despite advances, in-hospital mortality for ST-elevation myocardial infarction (STEMI) remains significant.
  • Intramyocardial hemorrhage post-primary percutaneous coronary intervention (PCI) is a known long-term risk factor, but its impact on in-hospital mortality is unclear.

Purpose of the Study:

  • To evaluate post-PCI high-sensitivity cardiac troponin I (hs-cTn-I) kinetics as a diagnostic tool for hemorrhagic myocardial infarction (MI).
  • To determine the association between hs-cTn-I-identified hemorrhagic MI and in-hospital mortality in STEMI patients.

Main Methods:

  • A multicenter study involving STEMI registries from seven US hospitals.
  • Development of time-dependent hs-cTn-I thresholds to diagnose hemorrhagic MI, validated against cardiac magnetic resonance imaging.
  • Analysis of 6180 STEMI patients to correlate hemorrhagic MI classification with in-hospital mortality.

Main Results:

  • Post-PCI hs-cTn-I kinetics demonstrated high accuracy (AUC > 0.92 within 10 hours) in diagnosing hemorrhagic MI.
  • Patients identified with hemorrhagic MI based on hs-cTn-I levels had a 2.81-fold increased risk of in-hospital mortality.
  • The diagnostic performance remained robust even after 10 hours post-PCI.

Conclusions:

  • Post-PCI hs-cTn-I kinetics show potential for diagnosing hemorrhagic MI.
  • Hemorrhagic MI identified through troponin kinetics is significantly associated with increased in-hospital mortality in STEMI patients.