A065 Demographic, Investigation, Management and Outcome in Patients Presenting with Acute Myocarditis. A 10-Year Audit

Abstract

To review demographics, investigations, follow up and outcomes (measured by mortality and left ventricular [LV] impairment) of patients with confirmed and suspected acute myocarditis in the New Zealand population. A retrospective review of clinical records in patients >15 years of age with confirmed or suspected acute myocarditis admitted to Coronary Care Unit (CCU) and Step-Down Unit (SDU) at Counties Manukau District Health Board from 1/1/2010 to 1/1/2020. Over 10 years 57 patients presented with acute myocarditis and required admission to CCU or SDU. 70% were male, median age was 39. Māori (21%) were over-represented. Troponin assay was performed in all patients. One patient did not have cardiac imaging due to death. 3 patients had an endomyocardial biopsy. LV impairment was present in 28% of patients. Patients presenting with LV impairment is likely to have higher Troponin I (17,976ng/L vs 6277 ng/l) than those without LV impairment. 61% of patients (n=35) were successfully followed up. 35% of patients (n=20) completed outpatient echocardiogram, 25% (n=14) completed outpatient cardiac magnetic resonance imaging. Among these patients, all had normal or low-normal LV functions. There were 3 deaths attributable to myocarditis. Male over-representation in myocarditis is surprising but has been reported in a previous New Zealand study. All patients had Troponin assay performed, almost all patients had cardiac imaging. Patients that were followed up all had normal or near-normal LV function. There were 3 deaths.