ATI RN
Physical Exam Cardiovascular System
1. Which artery supplies the right atrium, right ventricle, a portion of the septum, SA node, AV node, and inferior portion of the left ventricle?
- A. Right coronary artery
- B. Left circumflex artery
- C. Posterior descending artery
- D. Aortic artery
Correct answer: A
Rationale: The correct answer is the right coronary artery. It supplies essential areas of the heart, including the right atrium, right ventricle, a portion of the septum, SA node, AV node, and the inferior portion of the left ventricle. The left circumflex artery primarily supplies the left atrium and lateral wall of the left ventricle, not the mentioned areas. The posterior descending artery supplies the inferior wall of the left ventricle, not the right side. The aortic artery is a general term and does not specifically refer to an artery that supplies the mentioned areas.
2. In negative feedback mechanisms, changes away from the normal state
- A. stimulate changes in the same direction
- B. inhibit all body reactions
- C. stimulate changes in the opposite direction
- D. stimulate a reduction in all body requirements
Correct answer: stimulate changes in the opposite direction
Rationale: In negative feedback mechanisms, changes away from the normal state stimulate changes in the opposite direction. This is a fundamental concept in biological systems where the response to a stimulus opposes the initial change, helping to maintain homeostasis. Choice A is incorrect because negative feedback does not stimulate changes in the same direction. Choice B is incorrect because negative feedback does not inhibit all body reactions, but rather specific responses. Choice D is incorrect because negative feedback does not stimulate a reduction in all body requirements, but rather adjusts specific functions to restore balance.
3. What test measures the electrical activity of the heart to detect arrhythmias and other heart conditions?
- A. Electrocardiogram (ECG or EKG)
- B. Chest X-ray
- C. Stress test
- D. Arterial blood gas (ABG)
Correct answer: A
Rationale: An electrocardiogram (ECG or EKG) is used to measure the heart's electrical activity, aiding in the detection of arrhythmias and other heart conditions. Choice B, a chest X-ray, is not used to measure electrical activity but to visualize the structures of the chest. Choice C, a stress test, evaluates the heart's response to exertion and is not primarily focused on measuring electrical activity. Choice D, an arterial blood gas (ABG) test, is used to assess oxygen and carbon dioxide levels in the blood, not the heart's electrical activity.
4. The unit manager of a 32-bed medical-surgical unit allows the staff nurses to do self-governance for scheduling, client care assignments, and committee work. The manager would be considered which type of leader?
- A. Autocratic
- B. Democratic
- C. Bureaucratic
- D. Laissez-faire
Correct answer: D
Rationale: The correct answer is D, Laissez-faire. In a laissez-faire leadership style, the manager exerts very little control and allows the staff to have a high degree of autonomy in decision-making and problem-solving. This type of leader provides guidance when needed but largely leaves the decision-making process to the staff. Autocratic leadership (choice A) is characterized by centralizing decision-making authority, democratic leadership (choice B) involves shared decision-making, and bureaucratic leadership (choice C) relies on adherence to rules and procedures.
5. A nurse is providing discharge teaching to a client who has a new prescription for digoxin. Which of the following statements by the client indicates an understanding of the teaching?
- A. I will take my pulse before taking this medication.
- B. I should take this medication with food to prevent nausea.
- C. I will take this medication if my heart rate is less than 60/min.
- D. I should take this medication with food if I am not feeling well.
Correct answer: A
Rationale: The correct answer is A. Taking the pulse before taking digoxin is crucial as it helps monitor the heart rate, as digoxin can cause bradycardia as a side effect. Option B is incorrect because digoxin should be taken on an empty stomach to enhance absorption. Option C is incorrect because digoxin should be held and the healthcare provider should be contacted if the heart rate is less than 60/min. Option D is incorrect because digoxin should not be taken with food due to decreased absorption.
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