COVID AND THE VACCINE - TRUTH, LIES, AND MISCONCEPTIONS REVEALED, page-67518

Usually, myocarditis goes away without permanent complications. However, severe myocarditis can permanently damage the heart muscle.
Potential complications of myocarditis may include:

• Heart failure. Untreated, myocarditis can damage the heart muscle so that it can't pump blood well. In severe cases, myocarditis-related heart failure may require a ventricular assist device or a heart transplant.
• Heart attack or stroke. If the heart muscle is injured and can't pump blood, the blood that collects in the heart can form clots. A heart attack can occur if a clot blocks one of the heart (coronary) arteries. A stroke can occur if a blood clot in the heart travels to an artery leading to the brain.
• Rapid or irregular heart rhythms (arrhythmias). Damage to the heart muscle can change how the heart beats. Certain arrhythmias increase the risk of stroke.
• Sudden cardiac death. Certain serious arrhythmias can cause the heart to stop beating (sudden cardiac arrest). It's deadly if not treated immediately (sudden cardiac death).