COVID-19-Associated Acute Myocarditis: Risk Factors, Clinical Outcomes, and Implications for Early Detection and...

Area of Science:

• Cardiology
• Infectious Diseases
• Critical Care Medicine

Background:

• Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes COVID-19, a disease with multisystem complications, including cardiac issues.
• Acute myocarditis is a recognized complication of COVID-19, and prior research indicates higher mortality in patients with cardiac involvement.
• Understanding the impact of myocarditis and pre-existing cardiac conditions on COVID-19 outcomes is critical.

Purpose of the Study:

• To determine if COVID-19 patients develop myocarditis.
• To assess the association between myocarditis and increased need for ventilatory support and mortality.
• To evaluate if pre-existing cardiac conditions worsen outcomes in COVID-19 patients.

Main Methods:

• A multicenter, retrospective study involving 8,162 adult patients with confirmed COVID-19.
• Myocarditis was defined by elevated troponin-T (TnT) and brain natriuretic peptide (BNP) levels.
• Statistical analysis compared in-hospital mortality and ventilatory support rates between COVID-19 patients with and without myocarditis.

Main Results:

• 1,643 (20.1%) of COVID-19 patients developed new-onset acute myocarditis.
• Myocarditis significantly increased the risk of requiring ventilation and mortality (p<0.001).
• Underlying heart failure increased in-hospital mortality by 1.6 times; non-ischemic cardiomyopathy increased mortality by 2.33 times.

Conclusions:

• Myocarditis is a significant and potentially fatal complication of COVID-19.
• Routine TnT and BNP testing can help identify at-risk COVID-19 patients.
• Pre-existing heart conditions are associated with poorer COVID-19 outcomes, necessitating vigilant patient monitoring.