Failure of foramen ovale to close will cause what congenital heart disease?

IGNOU PB Bsc Nsg Entrance-2017

Child Health Nursing (Pediatrics)

Easy

Appeared in: IGNOU PB Bsc Nsg Entrance-2017

Explanation

The foramen ovale is a normal opening between the right and left atria in the fetal heart that allows blood to bypass the lungs.
After birth, pressure changes cause this opening to close and eventually seal, forming the fossa ovalis.
Failure of the foramen ovale to close completely results in a patent foramen ovale (PFO), which is a type of Atrial Septal Defect (ASD).
An ASD allows blood to flow between the atria (a left-to-right shunt), which can lead to right-sided heart volume overload and other complications over time.

Option A: This is a broad category of defects involving the structure of the pulmonary artery itself, such as truncus arteriosus or abnormal branching. It is not related to a defect in the atrial septum.
Option B: Pulmonary stenosis is a narrowing (stenosis) of the pulmonary valve or the pulmonary artery. This obstructs blood flow from the right ventricle to the lungs. It is a valvular or vascular defect, not a septal defect.
Option D: Transposition of the Great Arteries (TGA) is a serious defect where the aorta and pulmonary artery are switched. The aorta arises from the right ventricle and the pulmonary artery from the left ventricle. This is a defect of the great vessels, not the atrial septum.

Clinical Relevance

Nursing practice connection: Knowing Congenital Heart Defects resulting from failure of fetal circulatory structures to close after birth helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Many small Patent Foramen Ovales (PFOs) are asymptomatic and are found incidentally in about 25% of the adult population. They often require no treatment.
Larger Atrial Septal Defects can cause symptoms like shortness of breath, fatigue, and palpitations, and may lead to right heart failure or pulmonary hypertension if not corrected.
Nurses should be aware that patients with a known ASD/PFO are at risk for paradoxical embolism, where a clot from the venous system passes through the defect into the arterial system, potentially causing a stroke.

How to Approach the Question

First, identify the key anatomical structure in the question: the 'foramen ovale'.
Recall the location and function of the foramen ovale. It is an opening between the atria (atrial septum) in the fetal heart.
Logically deduce that if this opening ('foramen') in the atrial septum fails to close, it will result in a defect in the atrial septum.
Scan the options to find the one that describes a defect in the atrial septum.
Select 'Atrial septal defect' as it directly corresponds to the anatomical location of the foramen ovale.

Concept Tested & Keywords

Concept Tested: Congenital Heart Defects resulting from failure of fetal circulatory structures to close after birth.
Stem keywords: foramen ovale, failure to close, congenital heart disease
Lead-in keywords: what

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