Introduction to Acute Coronary Syndrome
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Questions and Answers

What is the cardiac-specific isoenzyme that increases when there has been damage to cardiac cells?

  • Myoglobin
  • CK-MM
  • Troponin T
  • CK-MB (correct)
  • Which biomarker remains elevated for a long period, often as long as 2 weeks, and can be used to detect recent myocardial damage?

  • Troponin T (correct)
  • CK-MB
  • Myoglobin
  • CK-MM
  • What protein found in myocardial cells regulates the myocardial contractile process?

  • CK-MM
  • Myoglobin
  • CK-MB
  • Troponin (correct)
  • What is used to evaluate ventricular function and can assist in diagnosing an MI, especially when the ECG is nondiagnostic?

    <p>Echocardiogram</p> Signup and view all the answers

    Which enzyme level starts to increase within 1 to 3 hours after the onset of symptoms and peaks within 12 hours?

    <p>Myoglobin</p> Signup and view all the answers

    What are used to diagnose an acute MI based on the release of cellular contents into the circulation when myocardial cells die?

    <p>Cardiac enzymes and biomarkers</p> Signup and view all the answers

    What is the preferred term for coronary occlusion and myocardial infarction?

    <p>Myocardial infarction</p> Signup and view all the answers

    Which condition includes reduced blood flow in a coronary artery, often due to rupture of an atherosclerotic plaque?

    <p>Unstable angina</p> Signup and view all the answers

    What can result in chest pain and other symptoms that may be referred to as preinfarction angina?

    <p>Unstable angina</p> Signup and view all the answers

    What results in complete occlusion of a coronary artery, leading to ischemia and necrosis of the myocardium?

    <p>Myocardial infarction</p> Signup and view all the answers

    Which term is used synonymously with coronary occlusion and heart attack?

    <p>Myocardial infarction</p> Signup and view all the answers

    What situation can result in chest pain and other symptoms that may be referred to as preinfarction angina?

    <p>Unstable angina</p> Signup and view all the answers

    When does a clot begin to form on top of the coronary lesion but the artery is not completely occluded?

    <p>Unstable angina</p> Signup and view all the answers

    What results in vasospasm (sudden constriction or narrowing) of a coronary artery?

    <p>Acute blood loss</p> Signup and view all the answers

    What leads to decreased oxygen supply in the context of acute coronary syndrome?

    <p>Low blood pressure</p> Signup and view all the answers

    What may result in chest pain and other symptoms that can be referred to as preinfarction angina?

    <p>Unstable angina</p> Signup and view all the answers

    What condition results in necrosis of the myocardium supplied by a specific artery due to complete occlusion of the artery?

    <p>Myocardial infarction</p> Signup and view all the answers

    What leads to increased demand for oxygen in the context of acute coronary syndrome?

    <p>Myocardial infarction</p> Signup and view all the answers

    What is the main presenting symptom in most patients with acute coronary syndrome?

    <p>Chest pain</p> Signup and view all the answers

    What do the signs and symptoms of MI, caused by stimulation of the sympathetic nervous system, include?

    <p>Cool, pale, and moist skin</p> Signup and view all the answers

    What diagnostic tool provides information to assist in ruling out or diagnosing an acute MI?

    <p>12-lead ECG</p> Signup and view all the answers

    What is a key diagnostic indicator for STEMI (ST-elevation myocardial infarction)?

    <p>ST-segment elevation</p> Signup and view all the answers

    What do abnormal Q waves on an ECG indicate?

    <p>Necrotic tissue</p> Signup and view all the answers

    How is NSTEMI (non-ST elevation myocardial infarction) diagnosed?

    <p>By blood levels of cardiac biomarkers</p> Signup and view all the answers

    What is the first ECG indicator to return to normal during recovery from an MI?

    <p>ST-segment elevation</p> Signup and view all the answers

    What differentiates NSTEMI from STEMI?

    <p>Elevated troponin levels without definite ECG evidence of acute MI</p> Signup and view all the answers

    What causes the ST segment to rise at least 1 mm above the isoelectric line on an ECG during an acute MI?

    <p>Delayed myocardial repolarization</p> Signup and view all the answers

    Which term refers to the differentiation between NSTEMI and STEMI based on diagnostic tests?

    <p>Acute coronary syndrome</p> Signup and view all the answers

    What is the main goal of medical therapy for patients with acute coronary syndrome?

    <p>To prevent or minimize myocardial tissue death</p> Signup and view all the answers

    What may be present during an MI without persistent ST elevation or other ECG changes?

    <p>Abnormal Q wave without ST-segment and T-wave changes</p> Signup and view all the answers

    What is the preferred term for an emergent situation characterized by an acute onset of myocardial ischemia that can lead to myocardial death?

    <p>Myocardial infarction (MI)</p> Signup and view all the answers

    What condition involves reduced blood flow in a coronary artery, often due to rupture of an atherosclerotic plaque, and may result in chest pain and other symptoms known as preinfarction angina?

    <p>Unstable angina</p> Signup and view all the answers

    What occurs when plaque rupture and subsequent thrombus formation result in complete occlusion of a coronary artery, leading to ischemia and necrosis of the myocardium supplied by that artery?

    <p>Myocardial infarction (MI)</p> Signup and view all the answers

    What is the term used to describe the spectrum of Acute Coronary Syndrome which includes unstable angina, NSTEMI, and STEMI?

    <p>Acute Coronary Syndrome (ACS)</p> Signup and view all the answers

    Which condition involves sudden constriction or narrowing of a coronary artery and may lead to decreased oxygen supply, resulting in myocardial ischemia?

    <p>Vasospasm of a coronary artery</p> Signup and view all the answers

    What type of situation results in reduced blood flow in a coronary artery, often due to rupture of an atherosclerotic plaque, but without complete occlusion of the artery?

    <p>Unstable angina</p> Signup and view all the answers

    In which condition does a clot begin to form on top of the coronary lesion but the artery is not completely occluded?

    <p>Unstable angina</p> Signup and view all the answers

    Which protein found in myocardial cells is specific for cardiac muscle and recognized as a reliable marker of myocardial injury?

    <p>Troponin T</p> Signup and view all the answers

    What enzyme is a cardiac-specific isoenzyme found mainly in cardiac cells and increases when there has been damage to these cells?

    <p>CK-MB</p> Signup and view all the answers

    Which enzyme level starts to increase within a few hours during acute MI and remains elevated for a long period, often as long as 2 weeks?

    <p>Troponin I</p> Signup and view all the answers

    What diagnostic tool can be used to evaluate ventricular function and assist in diagnosing an MI, especially when the ECG is nondiagnostic?

    <p>Echocardiogram</p> Signup and view all the answers

    What is the preferred term for coronary occlusion and heart attack?

    <p>MI (myocardial infarction)</p> Signup and view all the answers

    Which condition results in necrosis of the myocardium supplied by a specific artery due to complete occlusion of the artery?

    <p>STEMI</p> Signup and view all the answers

    What may be used to rule out an acute MI if negative results are obtained?

    <p>Elevated myoglobin level</p> Signup and view all the answers

    When does myoglobin level start to increase after the onset of symptoms and when does it peak?

    <p>Starts within 1 to 3 hours and peaks within 12 hours</p> Signup and view all the answers

    What can detect hypokinetic and akinetic wall motion and determine the ejection fraction?

    <p>Echocardiogram</p> Signup and view all the answers

    What is the main presenting symptom in most patients with acute coronary syndrome?

    <p>Chest pain that occurs suddenly and continues despite rest and medication</p> Signup and view all the answers

    What are the ECG changes that occur with an MI?

    <p>T-wave inversion, ST-segment elevation, and development of an abnormal Q wave</p> Signup and view all the answers

    Which biomarker remains elevated for a long period, often as long as 2 weeks, and can be used to detect recent myocardial damage?

    <p>Troponin</p> Signup and view all the answers

    What is the preferred term for coronary occlusion and myocardial infarction?

    <p>Heart attack</p> Signup and view all the answers

    What may result in chest pain and other symptoms that can be referred to as preinfarction angina?

    <p>All of the above</p> Signup and view all the answers

    What condition results in necrosis of the myocardium supplied by a specific artery due to complete occlusion of the artery?

    <p>STEMI</p> Signup and view all the answers

    Which term refers to the differentiation between NSTEMI and STEMI based on diagnostic tests?

    <p>12-lead ECG</p> Signup and view all the answers

    What enzyme level starts to increase within 1 to 3 hours after the onset of symptoms and peaks within 12 hours?

    <p>CK-MB</p> Signup and view all the answers

    What results in complete occlusion of a coronary artery, leading to ischemia and necrosis of the myocardium?

    <p>Heart attack</p> Signup and view all the answers

    What is used to evaluate ventricular function and can assist in diagnosing an MI, especially when the ECG is nondiagnostic?

    <p>Echocardiography</p> Signup and view all the answers

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