Cardiac Conduction System Quiz
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Questions and Answers

What does the QT interval measure?

  • Atrial impulse from the sinus node through the AV node
  • Impulse conduction through the ventricles
  • End of ventricular depolarization
  • Time needed for ventricular depolarization and repolarization (correct)

    • What does the ST segment represent in an ECG?

  • Time needed for ventricular depolarization and repolarization
  • End of ventricular depolarization (correct)
  • Atrial impulse from the sinus node through the AV node
  • Impulse conduction through the ventricles

    • What does T-wave inversion, ST-segment elevation, and a pathological U wave indicate during an MI?

  • Tissue hypoxia (correct)
  • Adequate blood supply to the myocardial tissue
  • Prolonged ischemia
  • Normal myocardial function

    • What does a U wave on an ECG represent?

    <p>Repolarization of the Purkinje fibers</p> Signup and view all the answers

    What is reflected by T-wave inversion in an ECG?

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

    What is associated with a prolonged PR interval on an ECG?

    <p>First-degree AV block</p> Signup and view all the answers

    Where does the right side of the heart receive deoxygenated blood from?

    <p>Systematic circulation</p> Signup and view all the answers

    Where does the left side of the heart pump blood to after it is oxygenated?

    <p>Rest of the body</p> Signup and view all the answers

    Which symptom is associated with left-sided heart failure?

    <p>Paroxysmal nocturnal dyspnea</p> Signup and view all the answers

    What is a sign of right-sided heart failure?

    <p>Jugular vein distention</p> Signup and view all the answers

    Which enzyme is inhibited by ACE inhibitors?

    <p>Conversion of angiotensin I to angiotensin II</p> Signup and view all the answers

    What are common adverse effects of lisinopril and other ACE inhibitors?

    <p>Dry cough and headache</p> Signup and view all the answers

    What are risk factors for primary hypertension?

    <p>Obesity, stress, high intake of sodium or saturated fat, and family history</p> Signup and view all the answers

    What is a sign of dehydration?

    <p>Skin tenting</p> Signup and view all the answers

    What do levels of CK, troponin T, and troponin I indicate?

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

    What are signs of right-sided heart failure?

    <p>Jugular vein distention, hepatomegaly, and right upper quadrant pain</p> Signup and view all the answers

    What is a potent vasoconstrictor in the blood that is inhibited by ACE inhibitors?

    <p>Angiotensin II</p> Signup and view all the answers

    What does the PR interval measure in an ECG?

    <p>The time from the P wave to the beginning of the QRS complex</p> Signup and view all the answers

    What is reflected by ST-segment elevation in an ECG?

    <p>Injury resulting from prolonged ischemia</p> Signup and view all the answers

    What does a notched T wave on an ECG indicate in an adult client?

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

    Where does the right side of the heart receive deoxygenated blood from?

    <p>Systematic circulation</p> Signup and view all the answers

    What is a U wave on an ECG representing?

    <p>Repolarization of the Purkinje fibers</p> Signup and view all the answers

    What is reflected by T-wave inversion in an ECG?

    <p>Ischemia resulting from inadequate blood supply to myocardial tissue</p> Signup and view all the answers

    What is a sign of right-sided heart failure?

    <p>Deposition of deoxygenated blood from pulmonary circulation</p> Signup and view all the answers

    What does a prolonged PR interval on an ECG indicate?

    <p>First-degree AV block</p> Signup and view all the answers

    Which of the following is a common adverse effect of lisinopril and other ACE inhibitors?

    <p>Dry cough</p> Signup and view all the answers

    What is a sign of dehydration?

    <p>Skin tenting</p> Signup and view all the answers

    Which enzyme is inhibited by ACE inhibitors?

    <p>Angiotensin-converting enzyme</p> Signup and view all the answers

    What are risk factors for primary hypertension?

    <p>Obesity and stress</p> Signup and view all the answers

    What is a sign of right-sided heart failure?

    <p>Jugular vein distention</p> Signup and view all the answers

    What does myoglobin elevation indicate?

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

    What do levels of CK, troponin T, and troponin I typically indicate?

    <p>Cellular damage due to myocardial ischemia or infarction</p> Signup and view all the answers

    What is a potent vasoconstrictor in the blood that is inhibited by ACE inhibitors?

    <p>Angiotensin II</p> Signup and view all the answers

    What is reflected by T-wave inversion in an ECG?

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

    Study Notes

    Electrocardiogram (ECG)

    • The QT interval measures the duration of ventricular depolarization and repolarization.
    • The ST segment represents the period of ventricular depolarization.
    • T-wave inversion, ST-segment elevation, and a pathological U wave indicate myocardial ischemia or infarction (MI) during an MI.

    Heart Function and Blood Flow

    • The right side of the heart receives deoxygenated blood from the body via the superior and inferior vena cava.
    • The left side of the heart pumps oxygenated blood to the body via the aorta.

    Heart Failure

    • Left-sided heart failure is associated with symptoms of shortness of breath and fatigue.
    • Right-sided heart failure is associated with signs of peripheral edema, jugular venous distension, and liver congestion.

    ACE Inhibitors

    • ACE inhibitors inhibit the angiotensin-converting enzyme, which is a potent vasoconstrictor in the blood.
    • Common adverse effects of lisinopril and other ACE inhibitors include cough, headache, and dizziness.

    Hypertension

    • Risk factors for primary hypertension include age, obesity, physical inactivity, and family history.

    Dehydration

    • A sign of dehydration is decreased urine output.

    Cardiac Biomarkers

    • Elevated levels of CK, troponin T, and troponin I indicate myocardial damage or infarction.

    ECG Abnormalities

    • ST-segment elevation reflects myocardial injury or infarction.
    • T-wave inversion reflects myocardial ischemia or injury.
    • A notched T wave on an ECG indicates coronary artery disease in an adult client.
    • A U wave on an ECG represents abnormal repolarization of the ventricles.

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    Description

    Test your knowledge of the cardiac conduction system with this quiz. Learn about the QT interval, PR interval, ST segment, and QRS duration.

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