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ECG InterpretationMedical Surgical Nursing

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Which part of the assessment of the cardiac rhythm on an ECG is usually flat, or isoelectric?
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The ST segment
What does the T wave represent?
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Repolarization of the ventricles
What does the QT interval represent?
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The amount of time it took for the ventricles to depolarize and repolarize
___________ refers to the ability of specialized cells in the atria, SA node, AV node, bundle of His and Purkinje fibers to discharge spontaneously.
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Automaticity
What is the normal firing rate of the SA node?
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60-100 times per minute
How frequently can the AV node fire if needed?
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40-60 times per minute
How frequently can the His-Purkinje system fire if needed?
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20-40 times a minute
A rate of less than 60 BPM that is regular and rhythmic is called...
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Sinus Bradycardia
A rate of more than 100 BPM that is regular and rhythmic is called...
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Sinus tachycardia
This heart pattern is characterized by a heart rate that is between 60-100 BPM and irregular. ECG monitoring will reveal an abnormally shaped P wave.
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PAC
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This dysrhythmia is characterized by 100-300 regular beats per minute and an abnormally shaped P wave with a normal or shortened PR interval and normal QRS complex.
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PSVT
You are looking at an ECG and notice that there is a saw tooth pattern. The monitor shows the patient's heart rate is 250-350 and regular. You know this is a classic presentation of...
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Atrial flutter
You are looking at an ECG and notice that there is a saw tooth pattern. The monitor shows the patient's heart rate is 80 and irregular. You know this is a classic presentation of...
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Ventricular flutter
________ is characterized by 350-600 beats per minute that are irregular. The ECG shows (f) waves and the PR interval isn't measurable. The QRS complex is normal.
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Atrial fibrillation
_________ dysrhythmias are characterized by a 40-140 heart rate that are regular. The P wave is inverted, or hidden in the QRS complex, the PR interval is variable.
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Junctional
What are the ECG findings for a patient with a first degree AV block?
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A PR interval less than 0.20 seconds
What are the ECG findings for a Type I second degree AV block that is in the atrium?
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A normal, regular heart rate with a progressively lengthening PR interval and a normal QRS width with one pattern of one non-conducted QRS complex
What are the ECG findings for a second degree Type I AV block that is ventricular?
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A slower, irregular heart rate with a progressively lengthening PR interval and a normal QRS width with one pattern of one non-conducted QRS complex
What are the ECG findings for a Type II Second-Degree AV block that is of atrial origin?
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A normal, regular heart rate with more P waves than QRS complexes, a normal or prolonged PR interval and a widened QRS, preceded by two or more P waves with non-conducted QRS complex
What are the ECG findings for a Type II second degree AV block that is ventricular in origin?
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A slower, regular or irregular heart rate with more P waves than QRS complexes, a normal or prolonged PR interval and a widened QRS, preceded by two or more P waves with non-conducted QRS complex
What cardiac structure is considered the pacemaker of the heart?
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The SA Node
  
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