NORCET-7 Mains-2024: Identify the following x-ray finding in the x-ray film?

NORCET-7 Mains-2024

Child Health Nursing (Pediatrics)

Easy

Appeared in: NORCET-7 Mains-2024

Explanation

The X-ray shows a "boot-shaped heart" or coeur en sabot, which is the classic radiographic sign for Tetralogy of Fallot (TOF).
This characteristic shape is formed by two key features of TOF: right ventricular hypertrophy, which causes the cardiac apex to be uplifted, and a hypoplastic (underdeveloped) main pulmonary artery, which creates a concave segment on the left heart border.
The lung fields also show decreased vascular markings (oligemia), consistent with the reduced pulmonary blood flow seen in TOF due to right ventricular outflow tract obstruction.

Option A: SAIO is not a recognized medical acronym for a finding on a chest X-ray related to congenital heart disease. It does not describe the visible cardiac anomaly.
Option B: A diaphragmatic hernia would present with abdominal contents, such as bowel loops (visible as air-filled structures), within the thoracic cavity. This X-ray shows clear lung fields and a well-defined diaphragm without herniated contents.
Option D: The classic X-ray signs of coarctation of the aorta are rib notching (due to collateral blood flow through intercostal arteries) and the "3 sign" (an indentation of the aorta at the site of coarctation). Neither of these findings is present in the image.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Radiographic identification of congenital heart defects, specifically Tetralogy of Fallot (TOF) as background academic context rather than a clinical decision trigger.
Recognizing the boot-shaped heart on a chest X-ray is a critical skill for nurses and clinicians, as it strongly suggests a diagnosis of Tetralogy of Fallot, prompting urgent pediatric cardiology consultation.
Nurses caring for infants with TOF must be vigilant for signs of hypercyanotic episodes ("Tet spells"), which are life-threatening events characterized by a sudden increase in cyanosis and respiratory distress. Immediate intervention, such as placing the infant in the knee-chest position, is crucial.
What if? If the X-ray instead showed an "egg-on-a-string" appearance (a large, oval-shaped heart with a narrow superior mediastinum), the most likely diagnosis would be Transposition of the Great Arteries (TGA), another critical cyanotic congenital heart defect requiring different management.

How to Approach the Question

First, carefully examine the provided image, which is a pediatric chest X-ray. Pay close attention to the size, shape, and position of the heart and great vessels.
Identify the most prominent abnormal finding. In this case, the heart has a distinct "boot" shape, with an elevated apex and a concave left upper border where the pulmonary artery should be.
Systematically evaluate the given options. Correlate the visual evidence from the X-ray with the known radiographic signs of each condition.
Recall or look up the classic X-ray finding for Tetralogy of Fallot (TOF), which is the "boot-shaped heart" or coeur en sabot.
Eliminate the other options by considering their typical X-ray appearances. A diaphragmatic hernia would show bowel in the chest. Coarctation of the aorta would show rib notching or a "3 sign". SAIO is not a standard diagnosis.
Conclude that the finding is most consistent with Tetralogy of Fallot based on the classic boot-shaped heart appearance.

Concept Tested & Keywords

Concept Tested: Radiographic identification of congenital heart defects, specifically Tetralogy of Fallot (TOF).
Stem keywords: x-ray finding, x-ray film
Lead-in keywords: Identify
Clinical cues: Boot-shaped heart on pediatric chest X-ray

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 588-590

E6 Medicine Davidson Principles Practice 24e p. 470-472