A nurse is interpreting the ECG strip of a client who has bradycardia. Which cardiac components should the nurse identify as the role of the P wave?
Early ventricular repolarization
Atrial depolarization
Slow repolarization of ventricular Purkinje fibers
Ventricular depolarization
The Correct Answer is B
A. Early ventricular repolarization is represented by the T wave, not the P wave.
B. The P wave represents atrial depolarization, which is the electrical activity that triggers the contraction of the atria.
C. Slow repolarization of ventricular Purkinje fibers is represented by the T wave, not the P wave.
D. Ventricular depolarization is represented by the QRS complex, not the P wave.
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Correct Answer is A
Explanation
A. This is the correct answer as conjunctivitis, commonly known as pink eye, is characterized by redness, swelling, and discharge from the eye, which is likely what the image shows.
B. Cataracts typically present as clouding of the lens of the eye, leading to blurred vision but do not present with redness or discharge like conjunctivitis.
C. This condition often involves increased intraocular pressure and can lead to vision loss, but it does not usually cause the symptoms depicted in the image of conjunctivitis.
D. This is primarily associated with central vision loss and does not produce the external symptoms of redness or discharge typical of conjunctivitis.
Correct Answer is D
Explanation
A. A pustule is a small elevation of the skin that contains pus, typically smaller than 0.5 cm.
B. A macule is a flat, discolored area of skin that is less than 0.5 cm in diameter, so it does not fit the description of elevated lesions larger than 0.5 cm.
C. A papule is an elevated, solid lesion that is less than 0.5 cm in diameter; lesions larger than this would not be classified as papules.
D. A patch is defined as a flat, non-palpable lesion larger than 0.5 cm, and psoriasis can present as patches. Thus, the lesions described fit this classification.