SOLVED

Chapter 8 Question 1 A patient has been diagnosed with premature ventricular contractions. The nurse realizes that this dysrhythmia can result from a weaker than normal stimulus during which action potential period? 1. Absolute refractory period 2. Relative refractory period 3. Supranormal period 4. Subnormal period Question 2 A patient’s electrocardiogram ST segment tracing is deflected from baseline. The nurse would conduct assessment for which condition? 1. Ventricular muscle injury 2. Atrial muscle injury 3. Respiratory acidosis 4. Hypocalcemia Question 3 A patient’s heart rate averages 86 beats per minute. If this patient is to have continuous electrocardiogram monitoring the nurse will set the rate alarms at which level? 1. Low 76, high 96 2. Low 66, high 106 3. Low 60, high 100 4. Low 80, high 100 Question 4 The nurse has determined that the patient has a bundle branch block. In order for this determination which condition must exist? 1. The PR interval must be longer than 0.20 seconds. 2. The ST segment must be elevated. 3. QRS segment should not be longer than 0.128 seconds. 4. The PR interval lengthens with each beat. Question 5 The nurse interpreting a patient’s electrocardiogram has just examined the P waves. What is the nurse’s next step? 1. Determine if each P wave is followed by a QRS complex. 2. Measure the PR interval. 3. Diagnose the rhythm. 4. Examine and measure the QRS complex. Question 6 A patient is diagnosed with hypermagnesemia. The nurse would assess for which changes on the patient’s cardiac rhythm strip? 1. Prolonged QT interval 2. Flattened T waves 3. Tall peaked T waves 4. Short QT interval 5. Prolonged PR interval Question 7 A patient’s admission vital signs were blood pressure 128/64 mm Hg; HR 86 bpm, respirations 16, and temperature 98.6°F. The patient has spiked a temperature of 101.6°F. Which change in heart rate would the nurse anticipate? 1. Increase to 116 bpm 2. Increase to 100 bpm 3. Decrease to 76 bpm 4. Increase or decrease of no more than 5 bpm Question 8 A patient presents to the emergency department and says, “I am so dizzy that it is scaring me.” Monitoring reveals the patient’s blood pressure is 78/52 mm Hg and heart rate is 50 beats per minutes. Which nursing intervention is indicated? 1. Administer anti-anxiety medication. 2. Administer atropine. 3. Instruct the patient to cough forcefully. 4. Monitor the patient while contacting the primary care provider. Question 9 A patient in the emergency department has a heart rate of 140 bpm. Which nursing interventions are indicated? 1. Assess the patient’s temperature. 2. Administer atropine. 3. Present a calm demeanor. 4. Assess the patient for pain. 5. Prepare for intubation. Question 10 A patient’s cardiac monitor reveals a regular rhythm with a rate of 240 bpm. No P waves are distinguishable. The patient is alert and says, “My heart is racing.” What nursing intervention is indicated? 1. Gather equipment to begin anticoagulant therapy. 2. Defibrillate the patient. 3. Prepare the patient for immediate cardioversion. 4. Ask the patient to bear down as if moving the bowels.