CARDIAC ADVERSE EVENTS AFTER VACCINATION-A SYSTEMATIC REVIEW

ABSTRACT

Background: Myocarditis and pericarditis can present as mild to life-threatening inflammatory symptoms involving the heart. This has been associated with several drugs and vaccines. We present adverse cardiac events reported after vaccination. Methods: A systematic review of the literature using Medline, Embase, Cochrane, and Scopus was performed to identify cases of adults who developed adverse cardiac events after vaccination from inception through July 2021. Data is reported using descriptive statistics. Results: There were 33 studies describing adverse cardiac events after vaccination with a total of 270 patients. The majority described adverse cardiac events following smallpox vaccine administration, followed by COVID-19 vaccination (12.96%), influenza vaccination (2.59%), tetanus vaccination (0.74%), and pneumococcal vaccination (0.74%). Approximately 85% of cases were male, and 96% of the patients were younger than 65 years old. From the cardiac events, 63.3% described were myocarditis, 13.33% were myopericarditis, 6.66% were acute coronary syndrome, 2.96% were pericarditis and 0.70% developed a pericardial effusion. Troponin levels were elevated in 68.2% of patients. Most developed cardiac events seven days post vaccination and 23.49% developed symptoms within seven days. Management was not described in the majority of the reports. In the cases where treatment was described anti-inflammatory medications were used in 56.09%, colchicine was used in 41.46% and steroids were used in 19.51% of patients. One patient required extra-corporeal membrane oxygenation. All patients recovered except one mortality with smallpox vaccine where biopsy showed eosinophilic epicardial inflammation on autopsy. Conclusion: Adverse cardiac events after vaccination have been reported with different vaccines. Management varies for these patients. These events are rare, and unlikely to be fatal.