INTRODUCTION Cardiovascular diseases (CVDs) have now become the leading cause of mortality in India. A quarter of all mortality is attributable to CVD. Ischemic heart disease and stroke are the predominant causes and are responsible for >80% of CVD deaths. The Global Burden of Disease study estimate of age- standardized CVD death rate of 272 per 100� 000 population in India is higher than the global average of 235 per 100�000 population. Some aspects of the CVD epidemic in India are particular causes of concern, including its accelerated buildup, the early age of disease onset in the population, and the high case fatality rate. In India, the epidemiological transition from predominantly infectious disease conditions to noncommunicable diseases has occurred over a rather brief period of time. Cardiac arrhythmias routinely manifest during or following an acute coronary syndrome. Although the incidence of arrhythmia is directly related to the type of ACS the patient is experiencing, the clinician needs to be cautious with all patients in these categories for example, nearly 90% of patients who experience acute myocardial infarction (AMI) develop some cardiac abnormality and 25% have a cardiac conduction 1disturbance within 24 hrs of infarct onset. Arrhythmias often complicate AMI, that it is debatable, whether to consider them under complications or under the clinical spectrum of AMI. The nature, frequency, as well as timing of the arrhythmias are important factors in deciding the 2life expectancy and mortality of the patient. CASE STUDY The study will be carried out in the emergency room, as well as the intensive coronary care unit (ICCU) and the cardiology ward of D.Y. Patil Hospital, Navi Mumbai, India. It will be a prospective observational study that will continue through the months of December 2017 to December 2018 (12 months) with a sample size of 100. INCLUSION CRITERIA: Patients within the ages of 18 who satisfy the who denition for the diagnosis of myocardial infarction will be included in this study: The diagnosis is made upon the presence of the following three criteria: Ÿ A clinical history of ischemic type of chest discomfort. Ÿ Changes in serially obtained electrocardiographic tracings (new st – t changes, presence of pathologic q wave, new left bundle branch block [lllb]) Ÿ A fall/ rise in serum cardiac markers. EXCLUSION CRITERIA: Ÿ Patients below the age of 18 Ÿ Gravid females. Ÿ Patients with recurrent myocardial infarction Ÿ Patients with valvular heart disease. Ÿ Patient with history of arrhythmia RESULTS Table No. 1- Incidence of arrhythmias Table 1: shows incidence of various types of arrhythmias in AMI. Many of the cases presented with more than one type of arrhythmia. Ventricular arrhythmias were present in a total of 26 % of patients of which 10% had VT and 16% had VPBs. Sinus tachycardia was present in 24% and sinus bradycardia in 19%. SVT was present in 3%, AF in 2% and atrial ectopic in 3%. Bundle branch block was seen in 14 %, complete heart block in 5% and AV blocks (I and II) in 6% of patients A STUDY OF INCIDENCE OF ARRHYTHMIAS IN MYOCARDIAL INFARCTION IN A TERTIARY CARE HOSPITAL Original Research Paper Dr. Siddharth Chouhan Junior Resident Dept. Of Medicine Dr. D. Y. Patil Hospital, Navimumbai X 1GJRA - GLOBAL JOURNAL FOR RESEARCH ANALYSIS General Medicine Myocardial infarction is dened by the demonstration of myocardial cell necrosis due to signicant and sustained ischemia. Cardiac arrhythmias routinely manifest during or following an acute coronary syndrome. Although the incidence of arrhythmia is directly related to the type of ACS the patient is experiencing, the clinician needs to be cautious with all patients in these categories for example, nearly 90% of patients who experience acute myocardial infarction (AMI) develop some cardiac abnormality and 25% have a cardiac conduction disturbance within 24 hrs of infarct onset ABSTRACT KEYWORDS : Myocardial Infarction ,arrhythmia VOLUME-9, ISSUE-2, FEBRUARY-2020 • PRINT ISSN No. 2277 - 8160 • DOI : 10.36106/gjra Dr Santwana Chandrakar* Head Of Unit, Dept Of Medicine, Dr. D. Y. Patil Hospital, Navimumbai *Corresponding Author Dr. Varun Shetty Associate Professor, Dept Of Medicine, Dr. D. Y. Patil Hospital, Navimumbai Types No. of cases Percentage Sinus tachycardia 24 24 Sinus bradycardia 19 19 Atrial ectopics 3 3 Atrial brillation 2 2 SVT 3 3 VPB 16 16 Ventricular tachycardia 10 10 AV Blocks I and II 6 6 AV block III 5 5 Bundle branch block 14 14 2 X GJRA - GLOBAL JOURNAL FOR RESEARCH ANALYSIS CONCLUSIONS: Cardiac arrhythmias routinely manifest during or following ACS. Early recognition and management of post myocardial infarction arrhythmias can signicantly modify the morbidity and mortality in myocardial infarction. As for incidence of various types of arrhythmias in AMI, many of the cases presented with more than one type of arrhythmia. Ventricular arrhythmias were present in a total of 26% of patients, out of which 10% had VT and 16% had VPBs. Sinus tachycardia was present in 24% and sinus bradycardia in 19%. SVT was present in 3%, AF in 2% and atrial ectopic in 3,43%. Bundle branch block was seen in 14%, complete heart block in 5% and AV blocks (I and II) in 6% of patients. REFERENCES: 1. Perron AD, Sweeney T. Arrhythmic complications of acute coronary syndromes. Emerg Med Clin N AM 2005;23:1065-1082 2. Robin NM, Bramah SN. Arrhythmias in acute myocardial infarction. In: Norris RM edt. Myocardial unfarction- Its presentation, pathogenesis and treatment. New York: Churchill Livingstone, 1st edn, Part-1, 1982:p.55-63 3. Swart G, Brady WJ, DeBehnke DJ, MA OJ. Acute myocardial infarction complicated by hemodynamically unstable bradyarrhythmia: prehospital and ED treatment with atropine. Am J Med 1999 Nov;17(7):647-652 4. Crimm A, Severance HW, Coffey K, McKinnis R, Wagner GS. Prognostic signicance of isolated sinus tachycardia during rst three days of acute myocardial infarction. Am J Med 1984 Jun;76(6):983-988 VOLUME-9, ISSUE-2, FEBRUARY-2020 • PRINT ISSN No. 2277 - 8160 • DOI : 10.36106/gjra