Conduction System of the Heart Quiz
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Questions and Answers

What is the definition of Stroke Volume?

  • The force of contraction
  • The amount of blood pumped out of one ventricle in a single beat (correct)
  • The amount of blood that leaves the heart in one minute
  • The resistance against which the heart must pump

    • What is the definition of Chronotropic?

  • Amount of opposition to blood flow offered by arterioles
  • The force of contraction
  • How fast the impulse travels cell to cell
  • Affects how fast the heart beats per speed up and slow down (correct)

    • What is the definition of Preload?

  • The amount of blood that leaves the heart in one minute
  • The amount of opposition to blood flow offered by arterioles
  • The amount of pressure in the ventricle at the end of diastole (correct)
  • The resistance against which the heart must pump

    • What is the definition of Automaticity?

    <p>The automatic movement</p> Signup and view all the answers

    What is the definition of Inotropic?

    <p>The force of contraction</p> Signup and view all the answers

    What is the purpose of the SA node in the conduction system of the heart?

    <p>To conduct electrical impulses to the atria</p> Signup and view all the answers

    What is the function of the bundle of His in the conduction system of the heart?

    <p>To conduct electrical impulses to the ventricles</p> Signup and view all the answers

    What is the purpose of the P wave in an ECG reading?

    <p>To indicate atrial depolarization</p> Signup and view all the answers

    What is the normal heart rate range for a sinus rhythm?

    <p>60-100 bpm</p> Signup and view all the answers

    What is artifact in an ECG reading?

    <p>A mechanical interference</p> Signup and view all the answers

    What are some common causes of electrocardiographic artifact?

    <p>Loose or defective electrodes</p> Signup and view all the answers

    Which of the following symptoms may benefit from ECG analysis?

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

    What is the definition of a stable patient?

    <p>BP above 90 and no altered LOC</p> Signup and view all the answers

    What is the definition of an unstable patient?

    <p>BP below 90 and altered LOC</p> Signup and view all the answers

    What is the chemical neurotransmitter for the sympathetic nervous system?

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

    Which receptors does epinephrine act on to cause vasoconstriction?

    <p>Alpha (1)</p> Signup and view all the answers

    What is the purpose of the parasympathetic nervous system?

    <p>Rest and digest</p> Signup and view all the answers

    What are the layers of the vessel wall, from innermost to outermost?

    <p>Tunica intima, tunica media, tunica adventitia</p> Signup and view all the answers

    What is happening in the cells during depolarization?

    <p>Sodium ions rush into the cell, changing interior charge to +</p> Signup and view all the answers

    What is the chemical neurotransmitter for the sympathetic nervous system?

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

    Which receptors does epinephrine act on to cause vasoconstriction?

    <p>Alpha 1 receptors</p> Signup and view all the answers

    What is the function of the parasympathetic nervous system?

    <p>Rest and digest</p> Signup and view all the answers

    Which layer of the heart wall is the innermost?

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

    What is the order of the layers of a vein or artery, from innermost to outermost?

    <p>Tunica intima, Tunica media, Tunica adventitia</p> Signup and view all the answers

    What is the term for the amount of opposition to blood flow offered by arterioles, which is determined by vasoconstriction and vasodilation?

    <p>Peripheral vascular resistance</p> Signup and view all the answers

    What is the term for the force of contraction of the heart?

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

    What is the term for the amount of blood that leaves the heart in one minute, calculated by multiplying heart rate and stroke volume?

    <p>Cardiac output</p> Signup and view all the answers

    What is the term for how fast the impulse travels from cell to cell in the heart?

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

    What is the term for the automatic movement of the heart?

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

    What is the most common cause of electrocardiographic artifact?

    <p>Loose or defective electrodes</p> Signup and view all the answers

    Which of the following is a symptom that may benefit from ECG analysis?

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

    What is the definition of a stable patient?

    <p>BP above 90 and no altered LOC</p> Signup and view all the answers

    What is the definition of an unstable patient?

    <p>BP below 90 and altered LOC</p> Signup and view all the answers

    Which of the following is NOT a cause of electrocardiographic artifact?

    <p>Normal cardiac electrical activity</p> Signup and view all the answers

    What is the normal heart rate range for a patient in bradycardia?

    <p>40-60 bpm</p> Signup and view all the answers

    What is the treatment for dysrhythmia?

    <p>Treat as bradycardia</p> Signup and view all the answers

    What is the purpose of the bundle of His in the conduction system of the heart?

    <p>To transmit the electrical impulse to the ventricles</p> Signup and view all the answers

    What is the definition of chronotropic?

    <p>The rate of the heart's contraction</p> Signup and view all the answers

    What is the difference between aortic valve and pulmonary valve?

    <p>Aortic valve carries oxygenated blood, pulmonary valve carries deoxygenated blood</p> Signup and view all the answers

    What is the purpose of the fibrous pericardium?

    <p>To anchor the heart in place</p> Signup and view all the answers

    What is the function of the tunica media in blood vessels?

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

    Which neurotransmitter is responsible for decreasing heart rate and atrioventricular conduction rates?

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

    What is happening in the cells during the resting state of the cardiac cycle?

    <p>The interior of the cell is electrically negative relative to the outside</p> Signup and view all the answers

    What is the function of the sympathetic nervous system?

    <p>To prepare the body for fight or flight</p> Signup and view all the answers

    Study Notes

    Comprehensive Overview of Cardiac Physiology and ECG Interpretation

    • Preload refers to the pressure in the ventricle at the end of diastole, while afterload is the resistance against which the heart must pump.
    • Cardiac output is the amount of blood leaving the heart per minute, calculated by multiplying heart rate and stroke volume.
    • Stroke volume is the amount of blood pumped out of one ventricle in a single beat, and Starling's Law states that the more the heart stretches, the more it will pump out.
    • Peripheral vascular resistance is the opposition to blood flow offered by arterioles, determined by vasoconstriction and vasodilation.
    • Inotropic refers to the force of contraction, while chronotropic affects the heart rate per unit of time, and dromotropic refers to the speed of impulse transmission between cells.
    • Excitability is the force of contraction, automaticity refers to the heart generating its own electrical impulses, and conductivity refers to the transmission of electricity.
    • The layers of the heart wall from innermost to outermost are endocardium, myocardium, pericardial cavity, epicardium, fibrous pericardium, and parietal pericardium.
    • The sympathetic nervous system is responsible for the "fight or flight" response, increasing heart rate, contractile forces, and vasoconstriction, while the parasympathetic nervous system is responsible for the "rest and digest" response, decreasing heart rate and atrioventricular conduction rates.
    • Vessels have three layers: tunica intima, tunica media, and tunica adventitia, while capillaries are only one cell thick.
    • The cardiac cycle begins with atrial contraction, followed by ventricular contraction, and ends with ventricular relaxation.
    • Polarization is the resting state of the heart, where the interior is electrically negative relative to the outside, while depolarization is the influx of sodium ions, and repolarization is the return of sodium ions to the outside and potassium to the inside.
    • The blood flows from the inferior and superior vena cava to the right atrium, through the tricuspid valve to the right ventricle, through the pulmonary valve to the pulmonary artery, to the lungs for oxygenation, through the pulmonary vein to the left atrium, through the mitral valve to the left ventricle, through the aortic valve to the aorta, and to the body.
    • The conduction system of the heart consists of the SA node, intranodal pathways, AV node, bundle of His, right and left bundle branches, Purkinje fibers, and individual myocytes. ECG interpretation involves analyzing heart rate, rhythm, P-wave, PR interval, and QRS complex. Heart rate can be counted using R to R intervals or counting QRS complexes in a six-second strip. Artifact is any electrocardiographic alteration

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    Description

    Test your knowledge on the anatomy and function of the conduction system of the heart with this quiz! From the SA node to the bundle branches, this quiz will challenge you to identify and describe each component's role in the heart's electrical conduction. Use keywords like "Inferior Vena cava," "pulmonary artery," "Aortic valve," and "Bundle of His" to showcase your understanding of the topic.

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