16.6: Review Questions
The nurse is watching a client’s cardiac monitor. The nurse recognizes that the QRS complex represents which phase of the cardiac cycle?
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Ventricular depolarization
Which of the following cardiac chambers pumps blood to the pulmonary artery and thus is prone to failure in clients with pulmonary arterial hypertension?
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Right ventricle
The nurse is caring for a client following a myocardial infarction. Which blood vessel does the nurse explain is blocked?
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Coronary artery
A client is being sent to the cardiac catheterization laboratory after an acute myocardial infarction. During the procedure, a physician will puncture and enter the femoral artery to gain access to various heart structures. Which of the following differentiates arteries like the femoral artery from veins?
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Arteries carry oxygenated blood to the body for use by the tissues.
The left ventricle pumps blood from the heart to the aorta for use by the body. Which of the following processes occurs nearly simultaneously with left ventricular systole?
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Right ventricular systole
Which of the following carries an electrical signal from the atria to the ventricles in the healthy heart?
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Atrioventricular node
Which of the following terms describes the ability of cardiac tissue to act as the pacemaker of the heart?
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Automaticity
A client is admitted to the hospital with dizziness and shortness of breath. The provider orders an ECG. Which of the following can be diagnosed based on the results of the ECG?
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Dysrhythmia
The nurse is teaching a group of cardiac rehab clients about the electrical conduction of the heart. What statement made by a client best indicates the teaching is effective?
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“The sinoatrial node is a specialized bundle of nerve tissue in the right atrium called the pacemaker of the heart.”
A client is admitted with bradycardia detected by an ECG. Which statement describes bradycardia?
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Heart rate less than 60 beats per minute