Myocarditis

12 min read

Myocarditis is an inflammation of the heart muscle, also known as the myocardium. It is usually caused by a viral infection, but can also be caused by bacteria, fungi, parasites, or other microorganisms. Myocarditis can also be caused by an autoimmune reaction, or by certain medications or toxins. It can lead to serious complications, including heart failure, arrhythmias, and sudden cardiac death.

Causes of Myocarditis

Myocarditis is usually caused by a viral infection, such as the flu, Coxsackievirus, adenovirus, or HIV. Bacterial, fungal, and parasitic infections can also cause myocarditis. In some cases, myocarditis is caused by an autoimmune reaction, in which the body's immune system mistakenly attacks the heart muscle. Certain medications, such as chemotherapy drugs, and toxins, such as alcohol, can also cause myocarditis.

Risk Factors for Myocarditis

People who are at an increased risk of developing myocarditis include those with weakened immune systems, such as those with HIV or AIDS, those who have had an organ transplant, and those who are taking immunosuppressant medications. People who have recently had a viral infection are also at an increased risk of developing myocarditis.

Diagnosis of Myocarditis

Myocarditis is usually diagnosed with a physical exam, electrocardiogram (ECG), echocardiogram, and blood tests. In some cases, a biopsy of the heart muscle may be necessary to confirm the diagnosis. In some cases, a cardiac MRI or CT scan may be used to diagnose myocarditis.

Complications of Myocarditis

Myocarditis can lead to serious complications, including heart failure, arrhythmias, and sudden cardiac death. It can also cause scarring of the heart muscle, which can lead to long-term heart problems. In some cases, myocarditis can cause inflammation of the pericardium, the sac that surrounds the heart.

Symptoms

Common Symptoms of Myocarditis

  • Chest pain or tightness
  • Shortness of breath
  • Fatigue
  • Fever
  • Rapid or irregular heartbeat
  • Swelling in the legs, ankles, and feet

Less Common Symptoms of Myocarditis

  • Cough
  • Lightheadedness
  • Palpitations
  • Dizziness
  • Nausea
  • Weight gain

When to See a Doctor

If you experience any of the above symptoms, it is important to seek medical attention right away. Myocarditis can be a serious condition and can lead to heart failure if left untreated. Your doctor will be able to diagnose and treat your condition.

Take the Myocarditis Assessment

Causes

Viral Causes

Viruses are the most common cause of myocarditis. The most common viruses that can cause myocarditis are coxsackievirus, adenovirus, and enterovirus. These viruses are spread through contact with saliva, mucus, or feces, and can cause mild to severe symptoms.

Bacterial Causes

Bacterial infections can also cause myocarditis. These infections are usually caused by Streptococcus, Staphylococcus, or Mycoplasma bacteria. Bacterial infections can be spread through contact with an infected person or animal, or through contaminated food or water.

Fungal Causes

Fungal infections can also cause myocarditis. These infections are usually caused by Candida or Aspergillus fungi. Fungal infections can be spread through contact with an infected person or animal, or through contaminated food or water.

Parasitic Causes

Parasitic infections can also cause myocarditis. These infections are usually caused by protozoa, such as Toxoplasma gondii or Trypanosoma cruzi. Parasitic infections can be spread through contact with an infected person or animal, or through contaminated food or water.

Medication Causes

Certain medications can also cause myocarditis. These medications include certain antibiotics, chemotherapy drugs, and immunosuppressants. If you are taking any of these medications, it is important to talk to your doctor about the potential risks.

Toxin Causes

Exposure to certain toxins can also cause myocarditis. These toxins include alcohol, tobacco, and certain industrial chemicals. If you are exposed to any of these toxins, it is important to talk to your doctor about the potential risks.

Autoimmune Causes

Autoimmune diseases can also cause myocarditis. These diseases include lupus, rheumatoid arthritis, and scleroderma. If you have any of these diseases, it is important to talk to your doctor about the potential risks.

Getting a Diagnosis

Diagnostic Tests for Myocarditis

The diagnosis of myocarditis is based on a combination of medical history, physical examination, and diagnostic tests. Common tests used to diagnose myocarditis include:

  • Electrocardiogram (ECG): An ECG is a test that records the electrical activity of the heart. It can detect abnormal heart rhythms and other signs of myocarditis.
  • Echocardiogram: An echocardiogram is an ultrasound of the heart. It can detect changes in the size and shape of the heart, as well as any fluid buildup in the heart.
  • Blood tests: Blood tests can detect signs of inflammation and infection, as well as any abnormal proteins in the blood.
  • Cardiac MRI: A cardiac MRI is a type of imaging test that can detect changes in the heart muscle.
  • Endomyocardial biopsy: This is a procedure in which a small sample of heart tissue is taken and examined under a microscope. It can detect signs of inflammation and infection.

Treatment of Myocarditis

Treatment of myocarditis depends on the underlying cause. Treatment may include medications to reduce inflammation and infection, as well as lifestyle changes to reduce stress on the heart. In some cases, surgery may be necessary to repair any damage to the heart muscle.

Questions for Your Doctor

Symptoms

It is important to discuss any symptoms you may be experiencing with your doctor. Common symptoms of myocarditis include chest pain, shortness of breath, fatigue, and palpitations. Your doctor may also ask about any other symptoms you may be experiencing, such as fever, chills, or joint pain.

Diagnosis

Your doctor will likely discuss the tests used to diagnose myocarditis. These tests may include an electrocardiogram (ECG), echocardiogram, chest X-ray, and blood tests. Your doctor may also discuss other tests that may be necessary to diagnose or monitor your condition.

Treatment

Your doctor will discuss the treatment options available for myocarditis. Treatment may include medications to reduce inflammation, antibiotics to treat any underlying infection, and lifestyle changes to reduce stress on the heart. Your doctor may also discuss the possibility of surgery if your condition is severe.

Follow-up Care

Your doctor will discuss the need for follow-up care. This may include regular check-ups, lifestyle changes, and medications to manage your condition. Your doctor may also discuss the need for additional tests or treatments if your condition worsens.

Risk Factors

Your doctor may discuss any risk factors you may have for developing myocarditis. These may include a weakened immune system, certain medications, or a history of heart disease. Your doctor may also discuss ways to reduce your risk of developing myocarditis.

Questions

Be sure to ask your doctor any questions you may have about myocarditis. Your doctor can provide you with more information about your condition and the best ways to manage it.

Treatment

Medications

Medications are often used to treat myocarditis. These may include:

  • Anti-inflammatory drugs, such as corticosteroids, to reduce inflammation and pain.
  • Antiviral medications, such as acyclovir, to treat the underlying viral infection.
  • Immune-suppressing drugs, such as cyclosporine, to reduce the body's immune response.
  • Beta blockers, such as propranolol, to reduce the heart rate and lower blood pressure.
  • Diuretics, such as furosemide, to reduce fluid buildup in the body.

Lifestyle Changes

Making lifestyle changes can help reduce the symptoms of myocarditis. These may include:

  • Eating a healthy diet that is low in salt and fat.
  • Exercising regularly to improve heart health.
  • Quitting smoking to reduce the risk of further heart damage.
  • Limiting alcohol consumption to reduce the risk of further heart damage.
  • Managing stress levels to reduce the risk of further heart damage.

Surgery

In some cases, surgery may be necessary to treat myocarditis. This may include:

  • A heart transplant to replace the damaged heart with a healthy one.
  • A ventricular assist device (VAD) to help the heart pump blood.
  • A pacemaker to regulate the heart rate.
  • A defibrillator to shock the heart back into a normal rhythm.

Treatment for myocarditis depends on the severity of the condition and the underlying cause. It is important to work with your doctor to determine the best treatment plan for you.

Drugs & Medications

Anti-inflammatory Drugs

Nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly used to reduce inflammation and pain associated with myocarditis. Commonly prescribed NSAIDs include ibuprofen (Advil, Motrin), naproxen (Aleve), and aspirin. These medications can help reduce inflammation and pain, but they can also increase the risk of bleeding and other side effects.

Corticosteroids

Corticosteroids are powerful anti-inflammatory medications that can be used to reduce inflammation and pain associated with myocarditis. Commonly prescribed corticosteroids include prednisone and methylprednisolone. These medications can be effective, but they can also cause serious side effects, including weight gain, increased blood sugar, and increased risk of infection.

Immunosuppressants

Immunosuppressants are medications that suppress the immune system and can be used to reduce inflammation and pain associated with myocarditis. Commonly prescribed immunosuppressants include azathioprine, cyclosporine, and mycophenolate mofetil. These medications can be effective, but they can also cause serious side effects, including increased risk of infection and cancer.

Antiviral Drugs

Antiviral drugs can be used to treat the underlying viral infection that is causing myocarditis. Commonly prescribed antiviral drugs include acyclovir, famciclovir, and valacyclovir. These medications can help reduce the severity of the infection, but they can also cause serious side effects, including nausea, vomiting, and diarrhea.

Beta-Blockers

Beta-blockers are medications that can be used to control heart rate and blood pressure. Commonly prescribed beta-blockers include metoprolol, atenolol, and propranolol. These medications can help reduce the risk of arrhythmias and other complications associated with myocarditis, but they can also cause serious side effects, including fatigue, dizziness, and depression.

Conclusion

Myocarditis is a serious condition that can lead to serious complications. Treatment typically involves medications to reduce inflammation, control symptoms, and prevent complications. Commonly prescribed medications include NSAIDs, corticosteroids, immunosuppressants, antiviral drugs, and beta-blockers. These medications can be effective, but they can also cause serious side effects. It is important to talk to your doctor about the risks and benefits of any medication before starting treatment.

Diet

Foods to Eat

When living with myocarditis, it is important to eat a balanced diet that is rich in nutrients. The following foods are recommended:

  • Fruits and vegetables: Aim to eat a variety of fruits and vegetables every day. These are rich in vitamins, minerals, and antioxidants, which can help reduce inflammation and support heart health.
  • Whole grains: Choose whole-grain breads, cereals, and pastas. These are high in fiber, which can help reduce cholesterol levels and improve heart health.
  • Lean proteins: Choose lean proteins such as fish, chicken, and beans. These are low in saturated fat and can help reduce inflammation.
  • Healthy fats: Include healthy fats such as olive oil, nuts, and avocados. These can help reduce inflammation and improve heart health.

Foods to Avoid

When living with myocarditis, it is important to avoid certain foods that can worsen inflammation and increase the risk of complications. The following foods should be avoided:

  • Processed foods: Avoid processed foods such as chips, cookies, and frozen meals. These are high in unhealthy fats and added sugars, which can worsen inflammation.
  • Saturated fats: Avoid foods high in saturated fats such as red meat, butter, and full-fat dairy products. These can increase cholesterol levels and worsen inflammation.
  • Added sugars: Avoid added sugars such as those found in candy, soda, and baked goods. These can increase inflammation and worsen heart health.
  • Salt: Avoid foods high in salt such as processed meats, canned soups, and fast food. These can increase blood pressure and worsen inflammation.

Conclusion

Eating a healthy diet is an important part of managing myocarditis and reducing the risk of complications. It is important to eat a variety of fruits and vegetables, whole grains, lean proteins, and healthy fats. It is also important to avoid processed foods, saturated fats, added sugars, and salt. By following these dietary guidelines, people with myocarditis can reduce inflammation and improve their heart health.

Lifestyle

Eat a Healthy Diet

Eating a healthy diet is essential for managing myocarditis. Focus on eating plenty of fruits, vegetables, whole grains, and lean proteins. Avoid processed foods, saturated fats, and added sugars. Eating a balanced diet can help reduce inflammation and improve your overall health.

Exercise Regularly

Regular exercise is important for managing myocarditis. Talk to your doctor about an exercise plan that is right for you. Start slowly and gradually increase the intensity and duration of your workouts. Exercise can help reduce inflammation, improve your heart health, and boost your overall wellbeing.

Manage Stress

Stress can worsen the symptoms of myocarditis, so it is important to find ways to manage it. Try relaxation techniques such as yoga, meditation, or deep breathing. Spend time with friends and family, and take time for yourself to do activities you enjoy. Avoid situations that cause you stress and find healthy ways to cope with it.

Get Enough Sleep

Getting enough sleep is essential for managing myocarditis. Aim for 7-9 hours of sleep each night. Avoid caffeine and alcohol before bed, and create a relaxing bedtime routine. Make sure your bedroom is dark and quiet, and keep the temperature cool. Getting enough sleep can help reduce inflammation and improve your overall health.

Quit Smoking

Smoking can worsen the symptoms of myocarditis, so it is important to quit. Talk to your doctor about quitting strategies that can help. Avoid triggers such as being around other smokers, and find healthy ways to cope with cravings. Quitting smoking can reduce inflammation and improve your overall health.