A nurse is providing teaching to a client who has atrial fibrillation and reports dizziness and palpitations. Which of the following should the nurse understand is the cause of these manifestations?

The heart's electrical transmission through the atrioventricular (AV) node is unusually slow.

The heart's electrical signals are rapid, chaotic, and irregular.

An early electrical signal occurs before the expected sinoatrial (SA) node signal.

The SA node sends an electrical signal greater than 100/min.

Answer and Explanation

The Correct Answer is B

A. The heart's electrical transmission through the atrioventricular (AV) node is unusually slow: This statement does not align with the manifestations of dizziness and palpitations in atrial fibrillation. A slow conduction through the AV node would typically manifest as bradycardia or heart block rather than rapid and irregular palpitations.

B. The heart's electrical signals are rapid, chaotic, and irregular: This is the correct answer. Atrial fibrillation is characterized by rapid, chaotic, and irregular electrical signals in the atria, leading to ineffective atrial contractions and an irregular ventricular response. The irregularity and rapidity of the heart rate can lead to symptoms such as palpitations and dizziness.

C. An early electrical signal occurs before the expected sinoatrial (SA) node signal: This statement does not accurately describe the mechanism of atrial fibrillation. Atrial fibrillation involves disorganized electrical activity in the atria, rather than a single early electrical signal.

D. The SA node sends an electrical signal greater than 100/min: While a heart rate greater than 100/min (tachycardia) is commonly associated with atrial fibrillation, this statement does not fully explain the manifestations of dizziness and palpitations. These symptoms are more directly related to the irregularity and chaotic nature of the heart's electrical signals in atrial fibrillation.

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Free Nursing Study Resources

Correct Answer is B

Explanation

A. "Note if you see any flashing bright lights on the grid." Flashing lights are not typically associated with macular degeneration. This symptom is more commonly associated with conditions like retinal detachment or migraine headaches.

B. "Check to see if the lines on the grid are blurry or distorted." This statement is correct. The Amsler grid is used to detect changes in central vision, which are common in macular degeneration. Patients with macular degeneration may perceive wavy or distorted lines instead of straight lines when looking at the grid, indicating central vision loss.

C. "Monitor for the lines on the grid to change in color or brightness." Changes in color or brightness of the lines on the grid are not typical features of macular degeneration. This statement does not accurately reflect the purpose of using an Amsler grid for macular degeneration.

D. "Watch for floating dark spots on the grid." Floating dark spots (floaters) are not typically associated with macular degeneration. Floaters are more commonly associated with conditions like posterior vitreous detachment or retinal detachment.

A. Diminished hair growth on the lower extremities B. Loss of pigmentation over the shin area C. Shiny appearance to the lower extremities D. Swollen and enlarged veins

Correct Answer is D

Explanation

A. Diminished hair growth on the lower extremities: Diminished hair growth on the lower extremities is not typically a manifestation of peripheral venous disease. Instead, it may suggest poor circulation or arterial insufficiency.

B. Loss of pigmentation over the shin area: Loss of pigmentation over the shin area can occur in conditions such as chronic venous insufficiency, which is a form of peripheral venous disease. However, it is not the most characteristic manifestation.

C. Shiny appearance to the lower extremities: A shiny appearance to the lower extremities is often associated with arterial insufficiency rather than peripheral venous disease. It can indicate thinning of the skin due to poor circulation and oxygenation.

D. Swollen and enlarged veins: Swollen and enlarged veins, also known as varicose veins, are classic manifestations of peripheral venous disease. These veins result from venous insufficiency, which leads to blood pooling and increased pressure in the veins, causing them to dilate and become visibly enlarged.

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A nurse is providing teaching to a client who has atrial fibrillation and reports dizziness and palpitations. Which of the following should the nurse understand is the cause of these manifestations?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is teaching a client who has macular degeneration about how to use an Amsler grid. Which of the following statements should the nurse include in the teaching?

Correct Answer is B

Explanation

A nurse is assessing a client who has peripheral venous disease. Which of the following findings should the nurse recognize as a manifestation of peripheral venous disease?

Correct Answer is D

Explanation

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