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Clinical Assessment Study Set 1

Medicine

Quiz 11 :

Interpretation of the Electrocardiogram

Quiz 11 :

Interpretation of the Electrocardiogram

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What does the QRS complex represent?
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C

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What is represented by the P wave on the ECG tracing?
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B

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Which chamber is responsible for pumping blood into the pulmonary circulation?
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D

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What is the upper limit in height of the normal P wave?
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Which of the following physiologic effects is associated with myocardial infarction?
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What is the ventricular heart rate when the AV node paces the heart?
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Which chamber of the heart initially receives deoxygenated blood from the vena cava?
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At what speed does the paper travel through the ECG machine?
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Why is the electrical signal delayed slightly at the AV node? 1) To allow better filling of the ventricles 2) To protect the ventricles against excessively rapid atrial rates 3) To provide time for atrial contraction prior to ventricular systole 4) To prevent premature atrial beats from reaching the ventricles
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Why is it important for a respiratory therapist (RT) to be able to identify cardiac dysrhythmias?
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What term applies to any heartbeat that originates outside the SA node?
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Where does the normal electrical impulse originate for each heartbeat?
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Which of the following are associated with the onset of dysrhythmias? 1) Hypoxia 2) Electrolyte imbalances 3) Sympathetic stimulation 4) Pulmonary hypertension
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The normal QRS complex does not exceed what time on the horizontal axis?
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How much time is represented on the horizontal axis of the ECG paper by five large boxes?
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Why is an ECG tracing so useful?
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What term describes the sudden loss of the negative charge inside the myocardial cells?
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What term describes heart cells that have the ability to spontaneously depolarize?
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What is the normal range for the PR interval?
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Which chamber normally has the largest muscle mass?
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