In rare cases, myasthenia gravis can affect the heart muscles through the autoimmune process, particularly in people who also have a thymus gland tumor (thymoma).
The main cardiac symptoms that can occur include
• Heart failure - where the heart cannot pump enough blood to meet the body's needs
• Arrhythmias - irregular Show Full Answer
In rare cases, myasthenia gravis can affect the heart muscles through the autoimmune process, particularly in people who also have a thymus gland tumor (thymoma).
The main cardiac symptoms that can occur include:
• Heart failure - where the heart cannot pump enough blood to meet the body's needs
• Arrhythmias - irregular heart rhythm patterns
• Myocarditis - inflammation of the heart muscle
October 13, 2025