Which of the following conditions is not under cyanotic heart disease?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2019

Child Health Nursing (Pediatrics)

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2019

Explanation

Patent Ductus Arteriosus (PDA) is an acyanotic congenital heart defect.
In PDA, there is a persistent connection between the aorta and the pulmonary artery.
This creates a left-to-right shunt, where oxygenated blood from the aorta flows into the pulmonary artery and back to the lungs.
Because oxygenated blood is still being delivered to the body, systemic cyanosis does not typically occur.
The characteristic murmur of a PDA is a continuous, 'machinery-like' sound.

Option A: Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart disease.
Option B: Transposition of the Great Arteries (TGA) is a cyanotic heart defect where the aorta and pulmonary artery are switched.
Option D: Truncus Arteriosus is a cyanotic heart defect.

Clinical Relevance

Nursing practice connection: Knowing Classification of Congenital Heart Diseases helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Recognizing the difference between cyanotic and acyanotic defects is crucial for nurses, as the initial presentation and management differ significantly. Cyanosis in a newborn is a medical emergency requiring immediate investigation.
Acyanotic defects like PDA may not be immediately obvious and can present later with signs of heart failure (e.g., poor feeding, rapid breathing) as the pulmonary blood flow increases.
What if? If a PDA is very large, the significant left-to-right shunt can lead to pulmonary over-circulation and heart failure. In some cases, this can cause pulmonary hypertension to develop over time, potentially leading to a reversal of the shunt (right-to-left), a condition known as Eisenmenger syndrome, which then causes cyanosis.

How to Approach the Question

First, identify the negative framing of the question: 'which... is NOT'. This means you are looking for the exception among the options.
The key concept is 'cyanotic heart disease'. Recall the definition: a condition causing deoxygenated blood to enter the systemic circulation (right-to-left shunt).
Review the options and classify each as cyanotic or acyanotic.
A helpful mnemonic for cyanotic defects is the '5 Ts': Tetralogy of Fallot, Transposition of great arteries, Truncus arteriosus, Tricuspid atresia, and Total anomalous pulmonary venous return.
Using this mnemonic, you can identify that Tetralogy of Fallot, Transposition of great arteries, and Truncus arteriosus are all cyanotic.
The remaining option, Patent ductus arteriosus, does not fit the 'T' mnemonic and is known as an acyanotic (left-to-right shunt) defect, making it the correct answer.

Concept Tested & Keywords

Concept Tested: Classification of Congenital Heart Diseases
Stem keywords: cyanotic heart disease
Lead-in keywords: not
Negative lead-in flag: Question asks to identify the condition that is NOT cyanotic.

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed pp. 541-543, 542-544

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 444-446