A nurse is assessing a client at a dermatology clinic.
Which of the following findings places the client at risk for developing malignant melanoma?

Choice A rationale

Atrial depolarization refers to the electrical activation of the atria, which is depicted by the P wave on an ECG, not the T wave. The P wave represents the contraction phase of the atria as it pumps blood into the ventricles. Therefore, this option is incorrect for the T wave.

Choice B rationale

Atrial repolarization is the process of the atria returning to their resting state. This repolarization is generally obscured by the QRS complex on an ECG and is not associated with the T wave. Thus, this answer choice is also incorrect.

Choice C rationale

Ventricular depolarization is represented by the QRS complex on an ECG. It indicates the ventricles are contracting to pump blood to the lungs and the rest of the body. Therefore, it does not correlate with the T wave.

Choice D rationale

Ventricular repolarization is indicated by the T wave on an ECG. This phase signifies the ventricles returning to their resting state after the contraction. It is the correct answer as it accurately reflects the T wave's function.

Choice A rationale

Without treatment, glaucoma can lead to blindness due to the progressive damage it causes to the optic nerve. Elevated intraocular pressure damages the optic nerve fibers, leading to peripheral vision loss and eventually total blindness if untreated.

Choice B rationale

Double vision is not a common symptom of glaucoma. Instead, glaucoma typically presents with symptoms like gradual peripheral vision loss, eye pain, and halos around lights.

Choice C rationale

Glaucoma is primarily caused by increased intraocular pressure, either due to overproduction of aqueous humor or improper drainage, not inadequate fluid production.

Choice D rationale

Use of eye drops helps to control intraocular pressure but does not improve vision; it helps to prevent further damage to the optic nerve.