Myasthenia Gravis

To diagnose myasthenia gravis, your healthcare provider will perform a physical exam and ask detailed questions to learn more about your symptoms and medical history. Testing confirms a diagnosis. It may include:

Blood antibody tests: About 85% of people with myasthenia gravis have unusually high levels of acetylcholine receptor antibodies in their blood. Approximately 6% of people diagnosed have muscle-specific kinase (MuSK) antibodies.
Imaging scans: An MRI or CT scan can check for thymus gland problems like tumors.
Electromyography (EMG): An EMG measures the electrical activity of muscles and nerves. This test detects communication problems between nerves and muscles.

Myasthenia gravis stages

There are five main classifications of myasthenia gravis that your healthcare provider may use during a diagnosis:

Class I: Muscle weakness only affects your eyes (ocular muscle).
Class II: Muscle weakness is mild.
Class III: Muscle weakness is moderate.
Class IV: Muscle weakness is severe.
Class V: Severe muscle weakness affects how you breathe. You may need intubation or mechanical ventilation.

Symptoms

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Complications

Blood clots are a dangerous complication of atrial fibrillation (AFib). Blood clots can lead to stroke.

The risk of stroke from AFib increases as you grow older. Other health conditions also may increase the risk of a stroke due to AFib. These conditions include:

High blood pressure.
Diabetes.
Heart failure.
Some types of heart valve disease.

Blood thinners are commonly prescribed to prevent blood clots and strokes in people with atrial fibrillation.

Prevention

Healthy lifestyle choices can reduce the risk of heart disease and may prevent atrial fibrillation (AFib). Here are some basic heart-healthy tips:

Control high blood pressure, high cholesterol and diabetes.
Don't smoke or use tobacco.
Eat a diet that's low in salt and saturated fat.
Exercise at least 30 minutes a day on most days of the week unless your health care team says not to.
Get good sleep. Adults should aim for 7 to 9 hours daily.
Maintain a healthy weight.
Reduce and manage stress.

By Mayo Clinic Staff

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Diagnosis & treatment

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