Background: Cardiac toxicity has largely been underestimated toxicity of checkpoint inhibitors. There have been several cases of myocarditis and fatal heart failure reported in patients treated with checkpoint inhibitors. We did a retrospective analysis of data of adverse effects of drugs that has been made available to public by the FDA. Methods: The FDA has made the data on adverse effects of various treatments available to general public through the FDA Adverse Events Reports System (FAERS) public dashboard. We investigated the cardiac toxicities of various immune check point inhibitor therapies available at FDERS for the years 2017-2018. Results: The reviewed the reported side effects of pembrolizumab, nivolumab, atezolizumab, avelumab, durvalumab and ipilimumab from FDA data. A total of 36,848 toxicities from immunotherapies were reported. Out of that, 2316(6.2 %) were cardio toxicities and 816 were fatal. The most common cardiac complications were as follows: myocarditis (15%), atrial fibrillation (13%), pericardial disease including pericardial effusion (13%), cardiac failure (17%) and coronary artery disease (19%). Approximately 50%, 43%, 40% 22% and 15 % of cases with myocarditis, ischemic heart disease, cardiac failure, atrial fibrillation and pericardia disease were fatal. Conclusions: Out of the reported cases of adverse reaction to check point inhibitor, 6.2% were cardio toxicities. 35% of cardio toxicities were fatal. Half of the cases who developed myocarditis died. There was no statistical difference in rate of cardiotoxicities caused by PD1, PDL1 or CTLA 4 inhibitors.