Common cause of heart valve stenosis in India is?

AIIMS Rishikesh & Jodhpur NO - 2017

Medical & Surgical Nursing

Easy

Appeared in: AIIMS Rishikesh & Jodhpur NO - 2017

Explanation

Rheumatic fever is an immunologically mediated inflammatory disease that occurs as a sequela to group A streptococcal pharyngitis.
It is the most common cause of acquired heart disease in children and young adults worldwide, especially in developing nations like India.
The autoimmune reaction leads to pancarditis, and the subsequent healing process results in fibrotic scarring of the heart valves, most commonly causing mitral stenosis.
Rheumatic heart disease is considered virtually the only cause of acquired mitral stenosis.

Option B: Cardiomegaly (an enlarged heart) is a consequence, not a cause, of valve stenosis. The heart muscle hypertrophies and the chambers dilate over time to compensate for the increased workload imposed by the stenotic valve.
Option C: Coronary Artery Disease (CAD) involves atherosclerosis of the coronary arteries, which supply blood to the heart muscle. It causes ischemia and infarction (heart attacks) but does not directly cause the leaflets of the heart valves to become stenotic.
Option D: While atherosclerosis does cause valve stenosis, it is the primary cause of calcific aortic stenosis, which is a degenerative disease typically seen in the elderly (older than 65 years) in developed countries. It is not the most common cause of valve stenosis in the overall Indian population.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Valvular Heart Disease in India as background academic context rather than a clinical decision trigger.
Nurses have a vital role in the primary prevention of rheumatic fever by educating patients and communities on the importance of seeking prompt medical treatment for sore throats.
For patients with a history of rheumatic fever, nurses are key in managing secondary prevention, which involves ensuring adherence to long-term antibiotic prophylaxis to prevent recurrent attacks and further heart damage.
What if? If the question described a 78-year-old patient in a developed country with symptoms of syncope and a harsh systolic murmur, the most likely cause of valve stenosis would be degenerative calcific aortic stenosis due to atherosclerosis, not rheumatic fever.

How to Approach the Question

First, identify the key components of the question: the condition ('heart valve stenosis'), the qualifier ('common cause'), and the specific population ('India').
The geographical context 'India' is a major clue, prompting you to consider diseases with a higher prevalence in developing countries.
Evaluate the options. Differentiate between potential causes (Rheumatic fever, Atherosclerosis) and consequences or related conditions (Cardiomegaly, CAD).
Recall the epidemiology of valvular heart diseases. Rheumatic fever is historically and currently the leading cause of mitral stenosis in young people and in developing nations.
Contrast this with atherosclerosis, which primarily causes aortic stenosis in the elderly in developed nations.
Conclude that for the population specified (India), rheumatic fever is the most fitting answer.

Concept Tested & Keywords

Concept Tested: Etiology of Valvular Heart Disease in India
Stem keywords: common cause, heart valve stenosis, India
Lead-in keywords: is
Clinical cues: The geographical location 'India' is a critical clue pointing towards diseases prevalent in developing countries.
Negative lead-in flag: false

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