1.
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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Atrial depolarization
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Atrial repolarization
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Ventricular depolarization
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Ventricular repolarization
2.
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
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Left ventricle
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Right atrium
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Left atrium
3.
The nurse is caring for a client following a myocardial infarction. Which blood vessel does the nurse explain is blocked?
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Aorta
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Coronary artery
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Vena cava
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Coronary vein
4.
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 have a lower blood pressure in comparison to veins.
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Arteries carry deoxygenated blood back to the heart to be pumped to the pulmonary circuit.
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Arteries are lower risk during a puncture in comparison to veins.
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Arteries carry oxygenated blood to the body for use by the tissues.
5.
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 atrial systole
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Right ventricular systole
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Right ventricular diastole
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Excitation of the sinoatrial node
6.
Which of the following carries an electrical signal from the atria to the ventricles in the healthy heart?
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Atrioventricular node
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Sinoatrial node
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Purkinje fibers
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Bundle of His
7.
Which of the following terms describes the ability of cardiac tissue to act as the pacemaker of the heart?
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Membrane potential
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Conductivity
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Automaticity
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Action potential
8.
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
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Atrial diastole
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Heart failure with reduced ejection fraction
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Left ventricular systole
9.
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 that slows the electrical impulse.”
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“The sinoatrial node is a specialized bundle of nerve tissue that causes ventricular contraction.”
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“The sinoatrial node is a specialized bundle of nerve tissue that repolarizes the ventricular myocardium.”
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“The sinoatrial node is a specialized bundle of nerve tissue in the right atrium called the pacemaker of the heart.”
10.
A client is admitted with bradycardia detected by an ECG. Which statement describes bradycardia?
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Heart rate greater than 100 beats per minute
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Heart rate greater than 60 beats per minutes
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Heart rate less than 100 beats per minute
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Heart rate less than 60 beats per minute