In India, what is the most common cause of cardiovascular mortality in the adult population?

Explanation

## Epidemiology of Cardiovascular Mortality in India **Key Point:** Coronary artery disease (CAD) is the leading cause of cardiovascular mortality in India, accounting for approximately 40–50% of all CVD deaths in urban populations and an increasing proportion in rural areas. ### Burden of Disease Shift India has undergone an epidemiological transition over the past three decades: 1. **Historical pattern** (pre-1990s): Rheumatic heart disease and hypertensive heart disease were the dominant causes in the Indian subcontinent. 2. **Current pattern** (2000s onwards): CAD has emerged as the leading cause due to: - Rapid urbanization and lifestyle changes - Rising prevalence of diabetes, hypertension, and dyslipidemia - Increased tobacco use - Sedentary behavior and obesity ### Comparative Mortality Burden | Cardiovascular Cause | % of CVD Deaths (India) | Key Feature | | --- | --- | --- | | **Coronary artery disease** | 40–50% | Leading cause; rising trend | | Rheumatic heart disease | 10–15% | Declining due to improved streptococcal prophylaxis | | Hypertensive heart disease | 15–20% | Significant but less than CAD | | Cardiomyopathy | 5–10% | Includes both dilated and restrictive forms | | Stroke (cerebrovascular) | 20–25% | Often counted separately from cardiac causes | **Clinical Pearl:** The Global Burden of Disease Study 2019 confirms CAD as the leading cause of premature death in India, with an age-standardized mortality rate of ~100 per 100,000 population. **High-Yield:** For NEET PG exams, remember that while rheumatic heart disease remains a significant public health problem in India (especially in low-income populations), CAD has surpassed it as the number-one cause of CVD mortality nationally. ### Why the Shift? ```mermaid flowchart TD A[Epidemiological Transition in India]:::outcome --> B[Urbanization & Lifestyle Changes]:::action A --> C[Rising NCD Risk Factors]:::action B --> D[↑ Sedentary behavior] B --> E[↑ Processed food intake] C --> F[↑ Diabetes prevalence] C --> G[↑ Hypertension] C --> H[↑ Tobacco use] D --> I[Coronary Artery Disease Dominance]:::outcome E --> I F --> I G --> I H --> I ``` **Mnemonic:** **CADI** = **C**oronary **A**rtery **D**isease **I**ndia (most common CVD mortality).