Mechanism of troponin elevations in patients with acute ischemic stroke

Jesper K Jensen1, Dan Atar, Hans Mickley

  • 1Department of Cardiology, Odense University Hospital, Odense, Denmark. jesperkjensen@dadlnet.dk

Insights

Neurologically induced myocardial injury is common in patients with acute ischemic stroke. This review examines troponin levels in stroke patients to clarify cardiac injury interpretation.

Area of Science:

  • Cardiology
  • Neurology
  • Biochemistry

Background:

  • Ischemic heart disease and cerebrovascular diseases often coexist due to shared risk factors.
  • Evidence suggests neurologically induced myocardial injury can occur in patients with stroke.
  • Elevated troponin levels in acute ischemic stroke present diagnostic challenges.

Purpose of the Study:

  • To systematically review studies measuring troponin in acute ischemic stroke patients.
  • To clarify the interpretation of troponin elevations in the context of neurological conditions.
  • To differentiate between cardiac-specific release and neurological mediation of troponin.

Main Methods:

  • Literature search for studies measuring troponin in acute ischemic stroke.
  • Systematic review and analysis of existing experimental, observational, and clinical trial data.
  • Evaluation of electrocardiographic alterations alongside troponin levels.

Main Results:

  • Troponin elevation is frequently observed in patients with acute ischemic stroke.
  • The precise cause of troponin elevation (cardiac vs. neurological) remains a diagnostic dilemma.
  • Electrocardiographic changes further complicate the interpretation of troponin levels.

Conclusions:

  • Troponin elevation in acute ischemic stroke requires careful interpretation.
  • Neurological mediation of troponin release is a significant consideration.
  • Further research is needed to definitively establish the mechanisms and clinical implications.

Related Concept Videos

Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

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...
Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...