Editorial - Journal of Cholesterol and Heart Disease (2018) Volume 2, Issue 3
Cardiology-2020: The Complexity of Coronary Artery Disease in Indians - Issues with Management-Cherian KM - FrontierLifeline & Dr.K.M.Cherian Heart Foundation, Chennai, India
Cardiovascular diseases (CVDs) have become the leading cause of mortality in India attributing to one fourth of all deaths and more than 80% of CVD deaths are due to coronary artery disease (CAD) and stroke . Data from numerous epidemiological studies showed that the burden of CAD was 3-5% in rural and 7-10% in urban populations. Various angiographic examines [2,3] have demonstrated that CAD design in Indian patients have some uniqueness which include: relatively younger age at presentation, a transcendence of multivessel disease, diffuse coronary artery involvement, distal disease and significant left ventricular dysfunction at presentation. This complexity in CAD among Indians is due to increased incidence of diabetes mellitus, smoking, hypertension, sedentary lifestyle, abdominal obesity, unhealthy diet and dyslipidemia in younger age both in men and women. In one study, the incidence of angiographically proven CAD in the young (<40 yr) was about 10 per cent [4,5].
The shocking rise in CAD prevalence is further difficult by high treatment costs and lack of health insurance coverage for the poor people who are entirely dependent on Government institutions for their health care needs. This outcomes in long holding up records and undue postponement in conveying ideal coronary intercession. Be that as it may, as of late the wellbeing plans approaches by the Central and state governments have made progressed cardiovascular intercessions and heart medical procedures promptly accessible for this segment of the general public.The National Interventional Council 2016 registry data showed that there are currently around 800 cath labs all over India providing coronary intervention. There is also an increase in the numbers of septuagenerians who undergo interventional procedures. There has been increase in the use of drug eluting stents (DES) in coronary interventions (>95%). The use of newer advances in interventional cardiology like intravascular untrasound (IVUS), rotablation, optcal coherence tomography (OCT) is also increasing. But unfortunately, all these facilities are charged exhorbitantly adding to the healthcare cost burden. This has recently resulted in the Government of India putting price cap to the stents used in India. Ever since the first coronary artery bypass grD? surgery (CABG) was first performed in India in 1975, the number of CABGs have increased and currently about 60000 CABGs are done all over India according to industry sources. The unpredictable idea of CAD brings about a few specialized difficulties for the heart specialists. These are mostly identified with little size of the coronary vessels and blood vessel channels, diffuse nature of the disease and late presentation . Smaller sized vessels may cause difficulty during anastomosis and may result in early graft closure leading to higher mortality . Initial concerns on the size of the arterial conduits have been refuted by autopsy studies by Reddy et al  which showed the size of arterial conduits to be adequate to make use of regularly in CABG.
Indians also tend to have diffuses CAD which, during CABG, results in (i) vessels requiring frequent endarterectomy, (ii) higher incidence of perioperative myocardial infarction, and (iii) an increased likelihood of bypass grafts occlusion after successful surgery. Few studies have reported the requirement of endarterectomy as around 15 percent in patients with diffuse disease undergoing CABG . Trehan et al.  reported the presence of adherent plaques with moderate inflammation with patchy areas of erythema in the coronary arterial walls of some patients undergoing CABG which makes it difficult to dissect in this area. Left ventricular dysfunction is also common in Indian patients seen in up to 20 percent at the time of CABG  with major bearing in the post-operative recovery . But these surgical problems have been partly overcome by the increased variation of off pump coronary artery bypass grafting (OPCAB), minimally invasive techniques (MIDCAB) and robotic surgery or totally endoscopic coronary artery bypass surgery (TECAB), LV remodelling employing decellularized bovine pericardium with or without stem cell implantation.
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3. Tewari S, Kumar S, Kapoor A, Singh U, Agarwal A, et al. (2005) Premature coronary artery disease in North India: An angiography study of 1971 patients. Indian Heart J 57: 311-318.
4. Dani S, Sinha N, Bhargava B, Jain V, Reddy VY, et al. ( 2007) Report of the Coronary Cardiac Interventions Registry of India ?e Cardiological Society of India for the year 2006. Indian Heart J 59: 528-530.
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6. Trehan N, Sharma VK, Kumar A (1992) In: Trehan N, Kumar A (editors) Coronary artery bypass graft surgery in Indians; the challenge of small vessels, diffuse disease and late presentation. New developments in cardiology and cardiac surgery. New Delhi: Escort Heart Institute and Research Centre pp: 159-170.
7. Reddy DB, Das B, Dogra TD, Venugopal P (1991) Dimensions of potential grafts for coronary artery bypass grafting in Indians: an autopsy evaluation study. Indian Heart J 43: 101-104.
Author(s): Cherian KM