Table 1. References of the case reports and case series used in this study.

No	Authors	Study name	Brief description
1.	Nassar et al. [1]	COVID-19 vaccine-induced myocarditis: a case report with literature review	Myocarditis is a likely consequence of COVID-19 vaccinations, according to the results of this case scenario. To avoid fatal complications, a differential assessment of patients with COVID-19 vaccination status and signs of severe cardiac decompensation must rule out myocarditis.
2	Lim et al. [5]	Case report: acute fulminant myocarditis and cardiogenic shock after messenger RNA Coronavirus disease 2019 vaccination requiring extracorporeal cardiopulmonary resuscitation	After mRNA COVID-19 vaccination, a case of acute fulminant myocarditis was worsened by cardiogenic shock, and the efficiency of ECMO assistance was critical for life-saving.
3	Onderko et al. [6]	Myocarditis in the setting of recent COVID-19 vaccination	Three patients developed chest pain after receiving the BNT162b2 Pfizer/BioNTech or the mRNA-1273 Moderna vaccine. Myocarditis was confirmed by clinical signs, biomarkers, and cardiac MRI.
4	Tailor et al. [7]	Case report: acute myocarditis following the second dose of mRNA-1273 SARS-CoV-2 vaccine	After receiving the second dosage of the mRNA-1273 SARS-CoV-2 vaccine, a patient developed symptomatic acute myocarditis. Minimal coronary artery disease was discovered during an emergency coronary angiography. Acute myocarditis was verified by cardiac magnetic resonance imaging (cMRI).
5	Albert et al. [8]	Myocarditis following COVID-19 vaccination	After receiving COVID-19 immunization, a 24-year-old had myocarditis symptoms. Myocarditis is a rare side effect of the COVID-19 vaccination, according to a case study.
6	Gautam et al. [9]	A late presentation of COVID-19 vaccine-induced myocarditis	A 66-year-old man presented with acute-onset chest pain after three months of receiving the second dose of the mRNA vaccine. On cMRI, he was discovered to have acute myocarditis, which was related to his exposure to the COVID-19 vaccine in the absence of any other risk factors. Review of the literature and summarized published case reports on COVID-19 vaccine-associated myocarditis.
7	Marshall et al. [10]	Symptomatic acute myocarditis in seven adolescents after Pfizer-BioNTech COVID-19 vaccination	This is a case series of seven cases of acute myocarditis or perimyocarditis in healthy male teenagers who developed chest pain four days after receiving the second dose of the Pfizer-BioNTech COVID-19 vaccine. Troponin levels were abnormally high in all of the patients. Late gadolinium enhancement (LGE) was seen on cardiac MRI, which is a sign of myocarditis. The symptoms of all seven patients disappeared quickly. Three patients received only nonsteroidal anti-inflammatory medications, whereas four others received intravenous immunoglobulin as well as corticosteroids.
8	Starekova et al. [11]	Myocarditis associated with mRNA COVID-19 vaccination	Five patients with aberrant MRI findings (4:1 male/female; 17–38 years old) were identified and were vaccinated against COVID-19 prior to MRI. All of the patients' cardiac troponin levels and ECG findings were abnormal. All of the patients were admitted to the hospital after experiencing sudden chest pain and being diagnosed with acute myocarditis.
9	Salah and Mehta [12]	COVID-19 vaccine and myocarditis	This pooled analysis showed that COVID-19 vaccine-related myocarditis mostly occurs in young male individuals following the second dose of the vaccine. It also showed that most cases occurred with mRNA vaccines (i.e., Pfizer-BioNTech and Moderna). And in all the reported cases, clinical symptoms resolved within six days with preservation of the cardiac function.
10	Hasnie et al. [13]	Perimyocarditis following the first dose of the mRNA-1273 SARS-CoV-2 (Moderna) vaccine in a healthy young male: a case report	A case of perimyocarditis that was temporally related to COVID-19 mRNA vaccination after three days of vaccination in a young male with prior COVID-19 infection but otherwise healthy.
11	Nagasaka et al. [14]	Acute myocarditis associated with COVID-19 vaccination: a case report	A case of myocarditis three days following a Pfizer COVID-19 vaccine.
12	Deb et al. [15]	Acute myocardial injury following COVID-19 vaccination: a case report and review of current evidence from vaccine adverse events reporting system database	A 67-year-old man presented with acute congestive heart failure and sustained acute myocardial damage as a result of an acute immunological response following the second dose of COVID-19 immunization (Moderna). Over the course of three days, his clinical condition improved.
13	Singh et al. [16]	COVID-19 mRNA vaccine and myocarditis	Case report of a 24-year-old male patient who developed chest pain after receiving the second dose of the Pfizer-BioNTech COVID-19 vaccine. He was diagnosed with myocarditis on further workup.
14	Tinoco et al. [17]	Perimyocarditis following COVID-19 vaccination	A case of a 39-year-old healthy individual having chest pain diagnosed with myocarditis three days after receiving the second dose of COVID-19 vaccine.