A student nurse is reviewing for an upcoming examination and recognizes in the ECG readings that the QRS wave represents which of the following?

Atrial depolarization.

Ventricular repolarization.

Atrial repolarization.

Ventricular depolarization.

Answer and Explanation

The Correct Answer is D

Choice A rationale

Atrial depolarization is represented by the P wave on an ECG, not the QRS wave. This phase involves the electrical activation and contraction of the atria, which precedes ventricular contraction.

Choice B rationale

Ventricular repolarization is represented by the T wave, not the QRS complex. The T wave signifies the ventricles returning to their resting state.

Choice C rationale

Atrial repolarization generally occurs during the QRS complex, but it is not represented by it. The electrical activity of atrial repolarization is masked by the more significant ventricular depolarization signal of the QRS complex.

Choice D rationale

The QRS complex on an ECG represents ventricular depolarization, which is the electrical activation leading to the contraction of the ventricles. This is the correct answer as it accurately describes the QRS wave’s significance. .

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Correct Answer is A

Explanation

Choice A rationale

The Angle of Louis, also known as the sternal angle, is located at the level of the 2nd intercostal space. It is a significant landmark in clinical examinations because it is used to locate important areas of the chest, such as the aortic and pulmonic areas, for auscultation.

Choice B rationale

The 3rd intercostal space is not the correct location for the Angle of Louis. The sternal angle is found at the level of the 2nd intercostal space, not the 3rd. Therefore, this option is incorrect.

Choice C rationale

The 2nd rib attaches at the level of the Angle of Louis. The sternal angle is an anatomical landmark where the manubrium and the body of the sternum meet, and it corresponds with the attachment of the 2nd rib.

Choice D rationale

The 4th intercostal space is not the correct location for the Angle of Louis. The sternal angle is located at the 2nd intercostal space, not the 4th. Therefore, this option is incorrect. .

A. Patient would be unable to pass the Snellen exam. B. Difficulty seeing from far or at a distance. C. Inability to see objects or letters close in range. D. Patient most likely will pass the Rosenbaum chart.

Correct Answer is C

Explanation

Choice A rationale

Patients with hyperopia (farsightedness) are able to see distant objects clearly but may have difficulty focusing on near objects. They can pass the Snellen exam, which measures distance vision, but may struggle with close-up tasks.

Choice B rationale

Hyperopia involves difficulty seeing close objects, not distant ones. Therefore, patients with hyperopia would not have difficulty seeing from far or at a distance, making this statement incorrect.

Choice C rationale

Hyperopia, or farsightedness, is characterized by the inability to see objects or letters that are close in range. It occurs when the eye's shape causes light to focus behind the retina instead of directly on it, leading to blurred near vision. Corrective lenses can help focus light properly on the retina.

Choice D rationale

The Rosenbaum chart is used to assess near vision acuity, which would highlight issues with hyperopia. However, patients with hyperopia would pass the Snellen exam, which tests distance vision, but might struggle with the Rosenbaum chart. .

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A student nurse is reviewing for an upcoming examination and recognizes in the ECG readings that the QRS wave represents which of the following?

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Naxlex Comprehensive Predictor Exams

During cardiac examination of a client, the nurse was demonstrating to the student nurse where to locate the Angle of Louis to listen to the Aortic and Pulmonic area on the chest.The nurse should locate the Angle of Louis at the level of what rib?

Correct Answer is A

Explanation

Which of the following is true in regards to hyperopia?

Correct Answer is C

Explanation

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