Figure 3. Comparative analysis of cardiac strain in healthy control and myocarditis with preserved ejection fraction (EF).

Case 1, representing the healthy control group, demonstrates standard levels of EF, left ventricular circumferential strain (LVCS), and left atrial peak early negative strain rate (LASRe), establishing a baseline for healthy myocardial function. In contrast, case 2, a patient with acute myocarditis with preserved EF (AMY‐pEF), maintains normal EF levels but exhibits reduced LVCS and LASRe. Notably, the LASRe shows a marked decrease. This comparison underlines the significant myocardial strain differences observed in patients with myocarditis with preserved EF when compared with healthy individuals, despite similar EF readings.