Risk stratification for future cardiac arrest after COVID-19 vaccination

Figure 2 Risk stratification approach for future cardiac arrest after coronavirus disease 2019 vaccination. Green boxes indicate clinical features, test results, and patients at lower risk. Red and pink boxes show tests and results indicating higher risk. Hx: History; AU/mL: Antibody units per milliliter; HR: Heart rate; BP: Blood pressure; ECG: Electrocardiogram; Hs-troponin: High-sensitivity troponin; BNP/NT-proBNP: Brain natriuretic peptide and N-terminal proBNP; LVEF: Left ventricular ejection fraction; POTS: Postural orthostatic tachycardia syndrome (Created in BioRender, Supplementary material).