Causes of hypertension in children?

AIIMS Raipur NO - 2019 (Shift-2)

Child Health Nursing (Pediatrics)

Easy

Appeared in: AIIMS Raipur NO - 2019 (Shift-2)

Explanation

In children, hypertension is most often secondary to an underlying pathology, unlike in adults where primary (essential) hypertension is more common.
Renal parenchymal disease is the most frequent cause of secondary hypertension in the pediatric population.
Glomerulonephritis involves inflammation of the glomeruli, which impairs renal function, leading to sodium and water retention.
This fluid retention increases intravascular volume, which directly elevates blood pressure. Activation of the renin-angiotensin-aldosterone system can also contribute.

Option A: Arrhythmia refers to an irregular heart rhythm. While some cardiac conditions can cause hypertension, arrhythmia itself is not a primary or common cause of sustained high blood pressure in children.
Option B: Dehydration leads to a decrease in total body fluid and blood volume (hypovolemia). This condition causes hypotension (low blood pressure), which is the opposite of hypertension.
Option C: Hypothyroidism is an underactive thyroid. While it can be associated with hypertension (particularly diastolic) in adults, it is an uncommon cause in children. Renal disease is a much more frequent cause.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of secondary hypertension in children as background academic context rather than a clinical decision trigger.
Accurate blood pressure measurement is critical in children. Nurses must use the correct cuff size (bladder width ~40% of arm circumference) to avoid false readings.
A diagnosis of hypertension in a child, especially a young child, should always prompt a thorough investigation for a secondary cause, starting with a renal workup (urinalysis, renal ultrasound).
What if? If the patient was an obese 15-year-old with a strong family history of hypertension, the likelihood of primary (essential) hypertension would be much higher, although secondary causes would still need to be ruled out.

How to Approach the Question

Identify the core of the question: It asks for a cause of high blood pressure specifically in children.
Recall the key difference between adult and pediatric hypertension: in children, hypertension is most often secondary to another condition.
Evaluate the options based on pathophysiology. Ask yourself, 'Which of these conditions is known to raise blood pressure?'
Eliminate 'Dehydration' first, as it leads to low blood volume and thus low blood pressure (hypotension).
Consider the remaining options. While cardiac and endocrine issues can cause hypertension, remember that renal (kidney) disease is the most common cause in the pediatric population.
Recognize that Glomerulonephritis is a significant renal disease, making it the most likely correct answer among the choices.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 703-705