Background: Cardiac dysrhythmia is a major cause of morbidity and mortality in patients presenting to the emergency department. It is important for emergency physicians to rapidly differentiate between life-threatening and benign dysrhythmia in order to accurately determine the course of treatment. Objective: This study aimed to describe cardiac dysrhythmia characteristics in adults admitted to the emergency department and its management. Methods: In this prospective observational study, after screening 365 patients presented to the Department of Emergency Medicine, AIIMS, New Delhi, with features consistent with cardiac dysrhythmia, 350 patients were included. Data were collected from May 2019 to June 2021. The test data were expressed as frequencies for nominal variables and as mean ± SD or median with a range for continuous variables. Results: Tachydysrhythmia (67%) was the most common form of cardiac dysrhythmia, followed by Bradydysrhythmia (21%) and cardiac arrest (11.7%). Statistically significant independent predictors of mortality among patients with cardiac dysrhythmia were complaints of dyspnea at presentation (OR- 3.4 (1.6-7.5), p value= 0.002) and increased delay in presentation to the emergency (OR- 1.2 (1.1-1.3), p value= 0.00).