A nurse reviews the electronic health record (EHR) of a woman who experienced shortness of breath, fatigue, and nausea. She was treated for anxiety before being diagnosed with acute coronary syndrome (ACS). What could explain the initial misdiagnosis?

Choice A reason: Scoliosis is clinically defined as a lateral, or sideways, curvature of the spine, often forming an "S" or "C" shape. In adolescents, this is frequently idiopathic and is detected during a physical exam by observing uneven shoulders, asymmetrical hip height, or a visible spinal curve.

Choice B reason: When the anteroposterior diameter equals the transverse diameter, it is described as a barrel chest. This is typically a sign of chronic obstructive pulmonary disease (COPD) or air trapping, not a spinal deformity like scoliosis, and is unusual in an adolescent population.

Choice C reason: A marked depression of the sternum is known as pectus excavatum, or funnel chest. This is a congenital structural deformity of the anterior chest wall and ribs, but it does not involve the lateral curvature of the vertebral column that characterizes a diagnosis of scoliosis.

Choice D reason: Forward protrusion of the sternum and ribs is called pectus carinatum, or pigeon chest. Like pectus excavatum, this is a chest wall deformity. While it may occasionally coexist with other skeletal issues, it is not the defining characteristic of a scoliosis assessment.

Choice A reason: Vesicular breath sounds with equal intensity indicate normal, healthy lung parenchyma with clear alveolar air exchange. These sounds are soft and breezy, heard over most of the peripheral lung fields. The presence of equal vesicular sounds would contradict a diagnosis of atelectasis, which involves localized lung collapse.

Choice B reason: Loud bronchial breath sounds heard in the peripheral lung fields usually indicate consolidation, as seen in lobar pneumonia, where solid tissue conducts sound more efficiently than air-filled alveoli. While atelectasis involves collapsed tissue, the complete obstruction of the bronchus often prevents any sound from reaching the chest wall, resulting in silence.

Choice C reason: High-pitched wheezing is associated with bronchospasm or narrowed airways, typically found in asthma or chronic obstructive pulmonary disease. While wheezing can occur with partial collapse, bilateral lower lobe wheezing suggests a systemic or widespread airway issue rather than the localized collapse characteristic of a single-sided atelectasis.

Choice D reason: Atelectasis is the collapse of alveoli, which prevents air from entering that portion of the lung. Consequently, during auscultation, the nurse will note diminished or entirely absent breath sounds over the affected region because there is no air movement to generate the sound. Dullness to percussion is also typically noted.