The nurse practitioner hears a harsh, grinding murmur and a systolic thrill upon cardiac auscultation of a 2-year-old girl. The NP understands the pathophysiology of this murmur to be which of the following?
Ventricular septal defect
Atrial septal defect
Transposition of the great arteries
Patent ductus arteriosus
The Correct Answer is A
Choice A reason: A ventricular septal defect (VSD) is the most common congenital heart defect and typically presents with a harsh, holosystolic murmur best heard at the lower left sternal border. A systolic thrill may also be palpable due to turbulent blood flow from the left to right ventricle. This matches the described auscultatory findings.
Choice B reason: An atrial septal defect (ASD) usually produces a soft systolic murmur due to increased flow across the pulmonary valve and a fixed split of the second heart sound. It does not typically produce a harsh murmur or systolic thrill.
Choice C reason: Transposition of the great arteries is a cyanotic congenital heart defect that presents with severe hypoxemia in neonates. It does not produce a harsh systolic murmur or thrill and is usually diagnosed based on cyanosis and imaging.
Choice D reason: Patent ductus arteriosus (PDA) produces a continuous "machinery" murmur, not a harsh systolic murmur. It is best heard at the left infraclavicular area and is associated with bounding pulses and widened pulse pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: HIV is not an autoimmune disorder. Autoimmune diseases involve the immune system attacking the body's own tissues, whereas HIV is a viral infection that targets and destroys immune cells, specifically CD4+ T lymphocytes.
Choice B reason: HIV infects CD4+ T cells and macrophages, leading to progressive depletion of these cells. This impairs both cell-mediated and humoral immunity, rendering the host susceptible to opportunistic infections and certain malignancies. The virus integrates into host DNA and replicates, gradually weakening the immune system.
Choice C reason: Tickborne illnesses such as Lyme disease or babesiosis are unrelated to HIV. They are caused by different pathogens and have distinct transmission routes and pathophysiology.
Choice D reason: HIV is not a nosocomial infection. It is primarily transmitted through blood, sexual contact, and vertical transmission from mother to child. Nosocomial infections are acquired in healthcare settings and typically involve bacteria like MRSA or Pseudomonas.
Correct Answer is C
Explanation
Choice A reason: Carcinomas are typically hard, irregular, immobile, and may be associated with skin changes or nipple retraction. While breast cancer must always be ruled out, the described mass lacks the suspicious features of malignancy.
Choice B reason: A clogged duct is usually painful and associated with lactation. It presents as a tender, localized area of swelling and is not typically rubbery or mobile. This patient is nulligravid and not lactating, making this diagnosis unlikely.
Choice C reason: Fibroadenomas are common benign breast tumors in young women. They are typically smooth, round, rubbery, mobile, and nontender. The location in the upper outer quadrant and the described characteristics strongly suggest a fibroadenoma.
Choice D reason: Duct ectasia involves dilation of the milk ducts and may present with nipple discharge, tenderness, or inflammation. It is more common in older women and does not typically present as a discrete, mobile mass.
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