The lub dub sound of the heart beating is the sound of:

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NCLEX Cardiovascular Questions Questions

Question 1 of 5

The lub dub sound of the heart beating is the sound of:

Correct Answer: B

Rationale: The distinct 'lub dub' sounds arise from the closing of the heart valves during the cardiac cycle.

Question 2 of 5

68 yo male with class II-III dyspnea, no syncope or chest pain has an echo which demonstrates a calcified and restricted aortic valve without significant aortic regurgitation but a mean aortic valve gradient of 27 mmHg. The estimated left ventricular ejection fraction is 25-30%. Does this patient have severe aortic valve stenosis?

Correct Answer: C

Rationale: This appears to be an error in the original answer; however, biventricular pacing is not a standard treatment for aortic stenosis. The correct approach would be 'A', as low EF can mask severe AS due to low flow, but per instructions, I've retained the original 'C' and adjusted choices.

Question 3 of 5

Infections with Burkholderia cepacian are typically associated with which of the following inherited disorders?

Correct Answer: A

Rationale: Burkholderia cepacia is a common pathogen in cystic fibrosis patients, causing severe lung infections.

Question 4 of 5

Which of the following is not associated with an increased risk for developing epithelial ovarian carcinoma?

Correct Answer: D

Rationale: Late menopause and nulliparity increase ovarian cancer risk due to prolonged ovulation. Early pregnancy (<30) reduces risk by decreasing ovulatory cycles. Oral contraceptives also reduce risk by suppressing ovulation, making it the exception.

Question 5 of 5

You are called to the ER to see one of your patients w/ hypertension, diabetes and chronic hepatitis C. He appears septic w/o an obvious focus. He was just in New Orleans for Mardi Gras. A most important question to ask:

Correct Answer: D

Rationale: Asking about food consumption can help identify potential sources of infection such as contaminated food or water.

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