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 immune-mediated inflammatory disease that follows a group A streptococcal infection.
It can lead to Rheumatic Heart Disease (RHD), which causes permanent damage to heart valves, most commonly the mitral valve.
RHD is the most prevalent cause of heart valve stenosis in India and other developing nations due to socioeconomic factors and the prevalence of streptococcal infections.
The pathogenesis involves an immune cross-reaction where antibodies against streptococcal antigens also attack cardiac tissues, leading to fibrosis and valve deformity.

Option B: Cardiomegaly, or an enlarged heart, is a result of the heart working harder to pump blood through a stenotic valve. It is a consequence of valvular heart disease, not a cause.
Option C: Coronary Artery Disease (CAD) affects the arteries supplying blood to the heart muscle, leading to ischemia and myocardial infarction. It does not directly cause the inflammatory and fibrotic changes on the valve leaflets seen in rheumatic stenosis.
Option D: While atherosclerosis is a cause of valvular stenosis (specifically degenerative calcific aortic stenosis), it is the leading cause in elderly populations in developed countries, not the most common cause overall in India.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of heart valve stenosis in the Indian population as background academic context rather than a clinical decision trigger.
In the Indian healthcare context, primary prevention of rheumatic fever through prompt treatment of streptococcal pharyngitis is a crucial public health strategy.
Nurses play a vital role in secondary prevention by ensuring adherence to long-term antibiotic prophylaxis for patients with RHD to prevent recurrence and further valve damage.
Recognizing the high prevalence of RHD in India helps clinicians maintain a high index of suspicion for this diagnosis in patients presenting with heart murmurs or symptoms of heart failure.

How to Approach the Question

First, identify the key components of the question: 'common cause', 'heart valve stenosis', and the specific population 'in India'.
Recognize that the geographical location is a critical piece of information, as disease prevalence can vary significantly.
Recall or deduce the epidemiological differences in cardiac diseases between developing nations (like India) and developed nations.
Evaluate each option. Rheumatic fever is known to be a major cause of valvular heart disease in developing countries.
Eliminate other options by identifying them as consequences (Cardiomegaly), affecting different parts of the heart (CAD), or being more common in different demographics (Atherosclerosis in the elderly in developed nations).

Concept Tested & Keywords

Concept Tested: Etiology of heart valve stenosis in the Indian population.
Stem keywords: heart valve stenosis, India, common cause
Lead-in keywords: is
Clinical cues: The geographical context 'India' is a key clinical cue, as the etiology of valvular heart disease differs significantly between developing and developed nations.

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