Severe COVID-19 Myocarditis in a Young Unvaccinated Patient

Area of Science:

• Cardiology
• Infectious Diseases
• Critical Care Medicine

Background:

• Coronavirus disease 2019 (COVID-19) myocarditis, a rare complication of SARS-CoV-2 infection, presents a significant mortality risk.
• Lack of established diagnostic and management guidelines has hindered effective treatment due to incomplete understanding of its pathophysiology.

Observation:

• A young, unvaccinated female with no prior health conditions developed rapidly progressive COVID-19 myocarditis.
• Initial symptoms included exertional dyspnea and tachycardia, with a positive SARS-CoV-2 test and severely reduced ejection fraction (20%) on echocardiogram.
• The patient rapidly deteriorated, requiring intubation and mechanical circulatory support due to fulminant myocarditis and cardiogenic shock.

Findings:

• Cardiac catheterization revealed non-obstructive coronary arteries and indicated biventricular failure.
• Despite interventions including planned Impella and ECMO support, the patient experienced two cardiac arrests with pulseless electrical activity.
• Resuscitative efforts were unsuccessful, leading to a fatal outcome.

Implications:

• This case emphasizes the aggressive potential of COVID-19 myocarditis, even in young, healthy individuals.
• It highlights the urgent need for further research into the pathophysiology and development of standardized treatment protocols.
• The case underscores the importance of considering myocarditis in the differential diagnosis of unexplained cardiac dysfunction during SARS-CoV-2 infection.