Coronary heart disease is the number one cause of death and disability in India and around the world. 1 Evidence-based approaches for prevention and treatment of coronary heart disease are widely available but are not used optimally, particularly in low-and middleincome countries. 2,3 In India, like in many countries, there are major gaps between actual and ideal care, and quality of care is substantially worse for patients with low socioeconomic status. 4 Studies of quality improvement in Brazil, 5 China, 6 and India 7 have been associated with improvements in acute coronary syndrome care [5][6][7] and in clinical outcomes. 7 However, there is an important need to further develop approaches to improve implementation of evidence-based care in these countries.Certain principles apply to implementing guidelines in any health care setting, as summarized by reviews of the evidence of what has been shown to be effective. 8 Effective strategies have been multifaceted, as there are numerous aspects to implementation such that any one element, such as physician reminders or a care pathway, is unlikely to make a large difference. Audit and feedback are important, and data collection is essential: if implementation strategies and outcomes are not measured, they cannot be improved. Targeted interactive education such as with outreach visits by experts from outside the practice setting is important.The interventions must also be customized to account for the barriers of the local health care setting. Understanding the gaps and barriers is a requirement for developing effective interventions in any health care system. In India, barriers to optimal care of acute coronary syndromes vary by region. These include financial barriers for patients and their families, transportation limitations in both rural (lack of transportation modes) and urban (heavy traffic) settings, lack of sophisticated emergency medical services, and inadequate integrated information systems to track patients through systems of care. Solutions have included use of cell phones for efficient transfer of information, including to patients and their families, and use of nonphysician health care workers to educate patients and their families, especially after discharge from the hospital, when use of effective treatments begins to wane. 9 Progressively more rigorous approaches have been developed for generation of evidence regarding what works for implementing guidelines. Most quality improvement programs have used a pre/post design, in which performance and outcomes are measured over time as an intervention to improve care is implemented. Although this use of a "historical control" group can be compelling, secular trends in both