A nurse is interpreting the ECG strip of a client who has bradycardia. Which of the following cardiac components should the nurse identify as the role of the P wave?

Slow repolarization of ventricular Purkinje fibers

Atrial depolarization

Early ventricular repolarization

Ventricular depolarization

Answer and Explanation

The Correct Answer is B

The P wave is the first wave on the ECG strip and represents the electrical activity of the atria. It reﬂects the depolarization of the atrial myocardium, which is the process of changing the electrical charge of the cardiac cells from negative to positive, triggering a contraction. The P wave precedes the QRS complex, which represents ventricular depolarization, and the T wave, which represents ventricular repolarization.

The other options are not correct because:

a. Slow repolarization of ventricular Purkinje fibers. This statement is incorrect because it describes the U wave, which is a small and sometimes invisible wave that follows the T wave on the ECG strip. It reﬂects the repolarization of the ventricular Purkinje fibers, which are specialized cardiac cells that conduct electrical impulses to the ventricles. The U wave is more prominent in conditions that cause hypokalemia, such as diuretic use or vomiting.

c. Early ventricular repolarization. This statement is incorrect because it describes the ST segment, which is the ﬂat line between the QRS complex and the T wave on the ECG strip. It reﬂects the early phase of ventricular repolarization, which is the process of restoring the electrical charge of the cardiac cells to negative after a contraction. The ST segment can be elevated or depressed in conditions that cause myocardial ischemia or injury, such as angina or myocardial infarction.

d. Ventricular depolarization. This statement is incorrect because it describes the QRS complex, which is the largest and most visible wave on the ECG strip. It reﬂects the depolarization of the ventricular myocardium, which triggers a ventricular contraction. The QRS complex follows the P wave and precedes the T wave on the ECG strip.

Nursing Test Bank

Quiz #1: RN Exams Pharmacology Exams Quiz #2: RN Exams Medical-Surgical Exams Quiz #3: RN Exams Fundamentals Exams Quiz #4: RN Exams Maternal-Newborn Exams Quiz #5: RN Exams Anatomy and Physiology Exams Quiz #6: RN Exams Obstetrics and Pediatrics Exams Quiz #7: RN Exams Fluid and Electrolytes Exams Quiz #8: RN Exams Community Health Exams Quiz #9: RN Exams Promoting Health across the lifespan Exams Quiz #10: RN Exams Multidimensional care Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Quiz #1: Naxlex RN Comprehensive online practice 2019 B with NGN Quiz #2: Naxlex RN Comprehensive Predictor 2023 Quiz #3: Naxlex RN Comprehensive Predictor 2023 Exit Exam A Quiz #4: Naxlex HESI Exit LPN Exam Quiz #5: Naxlex PN Comprehensive Predictor PN 2020 Quiz #6: Naxlex VATI PN Comprehensive Predictor 2020 Quiz #8: Naxlex PN Comprehensive Predictor 2023 - Exam 1 Quiz #10: Naxlex HESI PN Exit exam Quiz #11: Naxlex HESI PN EXIT Exam 2

Free Nursing Study Resources

Correct Answer is C

Explanation

Impaired tissue perfusion is a nursing diagnosis that indicates a decrease in oxygen and nutrient delivery to the tissues, resulting in cellular dysfunction and potential tissue damage or necrosis. It is the priority nursing diagnosis for a client who has varicose veins with ulcerations and lower extremity edema, as these are signs of chronic venous insufficiency, which is a condition in which the veins in the legs fail to return blood to the heart eﬀectively, causing blood to pool and stagnate in the lower extremities. This leads to increased venous pressure, inﬂammation, and impaired wound healing, which can cause skin breakdown, infection, and tissue necrosis. The nurse should monitor the client's vital signs, peripheral pulses, capillary refill, skin color, temperature, and sensation, and implement interventions to improve venous return and prevent further complications, such as elevating the legs, applying compression stockings, encouraging ambulation, administering medications, and providing wound care.

Alteration in body image. This is a nursing diagnosis that indicates a negative perception or dissatisfaction with one's physical appearance or function. It may be applicable for a client who has varicose veins with ulcerations and lower extremity edema, as these may aﬀect their self-esteem and social interactions. However, it is not the priority nursing diagnosis for this client, as it does not pose an immediate threat to their health or safety.

Alteration in activity tolerance. This is a nursing diagnosis that indicates a decrease in the ability to perform physical activities without experiencing fatigue, dyspnea, or other symptoms. It may be applicable for a client who has varicose veins with ulcerations and lower extremity edema, as these may limit their mobility and endurance. However, it is not the priority nursing diagnosis for this client, as it does not pose an immediate threat to their health or safety.

Impaired skin integrity. This is a nursing diagnosis that indicates a disruption or damage to the epidermis or dermis layers of the skin. It is applicable for a client who has varicose veins with ulcerations and lower extremity edema, as these can cause skin breakdown and infection. However, it is not the priority nursing diagnosis for this client, as it is a consequence of impaired tissue perfusion, which is the underlying problem that needs to be addressed first.

A. "You will notice a small hematoma at the incision site." B. "The dressing should be changed within 12 hours of the procedure." C. "You can resume regular exercise as soon as tomorrow." D. "Pain medication will not be necessary." E. None F. None

Correct Answer is A

Explanation

Rationale for A:

A small hematoma at the catheter insertion site is common after cardiac catheterization due to the puncture of blood vessels. The nurse should inform the client that this may occur but reassure them that it typically resolves on its own.

Rationale for B:

The dressing usually remains intact for 24 to 48 hours post-procedure to prevent infection and promote healing. The client should be instructed to keep the dressing clean and dry until the healthcare provider gives specific instructions.

Rationale for C: Clients are usually advised to avoid strenuous activities and exercise for several days after the procedure, not to resume regular exercise the next day.

Rationale for D: Pain medication may be necessary to manage discomfort post-procedure, and the nurse should encourage the client to take pain relief as needed.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

A nurse is interpreting the ECG strip of a client who has bradycardia. Which of the following cardiac components should the nurse identify as the role of the P wave?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

A nurse is providing discharge instructions to a client following a cardiac catheterization. Which of the following information should the nurse include?

Correct Answer is A

Explanation

A nurse suspects a client who has myasthenia gravis is experiencing a myasthenic crisis. Which of the following interventions should the nurse take?

A nurse is performing discharge teaching for a client who has seizures and a new prescription for phenytoin. Which of the following statements by the client indicates a need for further teaching?

A nurse in a provider's clinic is assessing a client who takes sublingual nitroglycerin for stable angina. The client reports getting a headache each time he takes the medication. Which of the following statements should the nurse make?

The nurse asks a client who is about to have a cardiac catheterization about any allergies. The client states, "I always get a rash when I eat shellfish." Which of the following is the priority nursing action?

A nurse is caring for a client who has peripheral vascular disease and reports difficulty sleeping because of cold feet. Which of the following nursing actions should the nurse take to promote the client's comfort?

A nurse is providing discharge teaching to a client who has peripheral arterial disease (PAD). Which of the following instructions should the nurse include in the teaching?