[Heart disease in myasthenia gravis].

The symptoms in myasthenia gravis are mainly due to reduced function of skeletal muscle. But some patients, especially those with a thymoma, have symptoms or signs of myasthenia-related heart disease. Some of our patients with histological myocarditis have died suddenly and unexpectedly. The frequency of electrocardiographic abnormalities among myasthenic patients has increased. Patients with myasthenia gravis should be subjected to cardiac monitoring after thymic surgery and during myasthenic crisis and other severe illnesses. If clinical examination leads to suspicion of myocarditis, the patient should receive immunosuppressive therapy.