[Clinical characteristics and treatment outcomes in patients with recurrent pericarditis].

<b>Objective:</b> To summarize and analyze the clinical characteristics and treatment outcomes of patients with recurrent pericarditis. <b>Methods:</b> This observational study consecutively recruited patients with recurrent pericarditis who were hospitalized at Peking University People's Hospital between January 2017 and February 2024. Clinical characteristics and treatment outcomes were collected and summarized during follow-up. <b>Results:</b> A total of 8 recurrent pericarditis patients including 3 males were included, with an age of 34.0 (22.0, 39.5) years. In terms of clinical features, all patients presented with acute-onset severe chest pain, accompanied by fever in 7 and an audible pericardial friction rub in 2 patients. Electrocardiogram showed no diffuse ST-segment elevation or PR-segment depression in any patient. Echocardiography revealed pericardial effusion in all cases, with extensive fibrinous exudate and transient pericardial thickening observed in 6 patients. CT identified concurrent pleural and/or peritoneal effusions in 6 patients. All patients exhibited marked elevations in C-reactive protein, erythrocyte sedimentation rate and D-dimer levels. Whole-exome sequencing identified MEFV gene mutations associated with familial Mediterranean fever in 3 cases. Two patients developed cardiac tamponade requiring pericardiocentesis, which revealed hemorrhagic effusion. In the aspect of treatment outcomes, the time from recurrence to first confirmed diagnosis of recurrent pericarditis of this cohort was 14.5 (13.3, 19.5) d. Upon diagnosis, all patients promptly received standard anti-inflammatory therapy with ibuprofen and colchicine, achieving rapid relief. However, during a follow-up of 12.0 (6.0, 25.3) months, 3 patients experienced recurrence, and 2 developed transient constrictive pericarditis. <b>Conclusion:</b> Patients with recurrent pericarditis typically exhibit characteristic clinical presentations, laboratory abnormalities, imaging findings and potential genetic associations. Although standard anti-inflammatory therapy demonstrates favorable short-term efficacy, long-term management remains challenging due to the risks of recurrence and progression to constrictive pericarditis.