One of the following is a cyanotic congenital heart disease?

IGNOU PB Bsc Nsg Entrance-2017

Child Health Nursing (Pediatrics)

Medium

Appeared in: IGNOU PB Bsc Nsg Entrance-2017

Explanation

Pulmonary stenosis is an obstructive congenital heart defect that narrows the passage from the right ventricle to the pulmonary artery.
While mild to moderate forms are acyanotic, severe or 'critical' pulmonary stenosis significantly increases pressure in the right side of the heart.
This high pressure can force deoxygenated blood to move from the right atrium to the left atrium (a right-to-left shunt) through an associated opening like a patent foramen ovale (PFO) or atrial septal defect (ASD).
The mixing of deoxygenated blood into the systemic circulation results in cyanosis, making it a cyanotic condition in these severe cases.

Option A: Atrial septal defect (ASD) is a classic acyanotic congenital heart disease. It involves a hole in the septum between the atria, causing a left-to-right shunt where oxygenated blood flows from the left atrium to the right atrium.
Option B: Ventricular septal defect (VSD) is the most common congenital heart defect and is acyanotic. It features a hole in the septum between the ventricles, leading to a left-to-right shunt of oxygenated blood from the left ventricle to the right ventricle.
Option D: Patent ductus arteriosus (PDA) is an acyanotic defect. It is the failure of the ductus arteriosus (a fetal blood vessel) to close after birth, resulting in a left-to-right shunt where oxygenated blood from the aorta mixes with blood in the pulmonary artery.

Clinical Relevance

Nursing practice connection: Knowing Classification of congenital heart diseases as cyanotic or acyanotic helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses must be skilled in the early recognition of cyanosis in newborns, as it can signal a critical cardiac emergency requiring immediate prostaglandin infusion and surgical consultation.
A key nursing assessment is differentiating between central cyanosis (blue tongue and mucous membranes), which indicates true hypoxemia, and peripheral cyanosis (acrocyanosis), which can be normal in newborns.
Monitoring oxygen saturation via pulse oximetry is a critical nursing intervention for any infant suspected of having congenital heart disease.

How to Approach the Question

First, identify the core concept being tested: the classification of congenital heart disease into cyanotic and acyanotic types.
Recall the fundamental difference: Acyanotic defects typically involve a left-to-right shunt (oxygenated blood recirculates to the lungs), while cyanotic defects involve a right-to-left shunt (deoxygenated blood enters systemic circulation).
Systematically evaluate each option. Recall that Atrial Septal Defect (ASD), Ventricular Septal Defect (VSD), and Patent Ductus Arteriosus (PDA) are the most common examples of acyanotic defects.
Consider Pulmonary Stenosis. It is an obstructive lesion, not a shunt. However, think about the hemodynamic consequences. Severe obstruction increases right-sided pressure.
Deduce that this high pressure can force a right-to-left shunt if an interatrial communication (like a PFO or ASD) exists, thus causing cyanosis.
Conclude that among the given choices, Pulmonary Stenosis is the only one that can present as a cyanotic condition at birth.

Concept Tested & Keywords

Concept Tested: Classification of congenital heart diseases as cyanotic or acyanotic.
Stem keywords: cyanotic, congenital heart disease
Lead-in keywords: One of the following is
Negative lead-in flag: false

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