When we talk about heart health, we often mention common diseases such as coronary heart disease, hypertension, and heart failure. However, there is a type of heart disease that, although not as well-known as other diseases, is still an important health issue, and that is myocarditis.
1、 What is myocarditis? Myocarditis is an acute or chronic inflammatory lesion of the myocardium that can lead to impaired myocardial function. In mild cases, patients may not feel obvious, but in severe cases, it may lead to severe damage to heart function, and even serious consequences such as heart failure and sudden death.
This disease occurs more frequently in winter and spring, mainly affecting young and middle-aged people who are generally healthy and have no underlying diseases. Long term fatigue can also increase the probability of developing the disease. In all cases of myocarditis, the majority are common acute myocarditis with relatively mild symptoms. But there are also a few cases of fulminant myocarditis, which are critical and have a mortality rate as high as 80%.
Myocarditis is mainly divided into two categories: infectious and non infectious. Infectious myocarditis is mainly caused by pathogens such as viruses and bacteria, among which viral myocarditis is the most common. Non infectious myocarditis is mainly caused by allergies or allergic reactions, such as rheumatism and certain medications, which can lead to myocarditis.
In terms of the severity of the condition, myocarditis can be divided into ordinary acute myocarditis and fulminant myocarditis. Ordinary acute myocarditis is the most common and the condition is relatively mild. Most patients have a good prognosis, but there are also some patients whose condition may develop into chronic or persistent myocarditis or cardiomyopathy in the long term. However, sudden onset and rapid progression of fulminant myocarditis can lead to severe heart failure, hypotension, or cardiogenic shock, requiring timely and intensive treatment and care. Although the mortality rate during the acute phase is relatively high, if patients can overcome the acute danger period, their long-term prognosis is usually good.
2、 Inducing factors of myocarditis
myocarditis is a cardiac inflammatory disease with various etiologies. The most common cause is viral infection, such as Coxsackievirus B, Echo virus, poliovirus, etc. These viruses can infect the myocardium through multiple pathways and cause damage to myocardial cells.
In addition to viral infections, infections such as bacteria, fungi, spirochetes, rickettsia, protozoa, worms, etc. may also cause myocarditis, but they are relatively rare. These pathogens may infect myocardial cells through similar pathways, leading to the occurrence of myocarditis.
In addition, some non infectious factors may also lead to myocarditis. These factors include drugs, toxins, radiation, connective tissue disease, vasculitis, giant cell myocarditis, sarcoidosis, etc. Among them, drugs are one of the most common triggering factors, such as antiarrhythmic drugs, immunosuppressants, etc. In addition, autoimmune diseases such as connective tissue disease and vasculitis may also cause myocarditis.
For viral myocarditis, its pathogenesis mainly includes direct myocardial damage caused by the virus and the combined effect of the virus and the body's immune response leading to myocardial damage. The myocardial damage directly caused by viruses is mainly due to the direct attack and destruction of myocardial cells by viruses, while the myocardial damage caused by the combined effect of viruses and the immune response of the body is due to immune damage mediated by T lymphocytes, as well as myocardial damage and microvascular damage mediated by various cytokines and NO.
In daily life, factors such as excessive fatigue, high mental stress, and acute infections may also trigger myocarditis. These factors may weaken the body's immune system, leading to the occurrence of viral infections and inflammation.
3、 Differential diagnosis
The differential diagnosis of myocarditis is very important, as incorrect diagnosis may delay treatment and even lead to serious consequences.
Differentiation from coronary heart disease: coronary heart disease is a disease caused by atherosclerosis, so its onset age is usually later than viral myocarditis. Coronary heart disease patients usually have chronic diseases such as hypertension, high cholesterol, diabetes, and viral myocarditis is usually an acute disease caused by viral infection.
Distinguishing from chest and lung diseases: Some chest and lung diseases may cause symptoms such as chest pain and tightness, which may be mistaken for symptoms of myocarditis. Therefore, some examinations are needed to identify these diseases, such as chest X-rays or CT scans.
Distinguishing from arrhythmia: If patients with myocarditis experience palpitations, it is necessary to differentiate from arrhythmia. You can first observe whether there are changes in myocardial markers and necrosis markers. If the necrosis markers are normal, the patient can be given a 24-hour dynamic electrocardiogram to determine whether it is a simple arrhythmia.
In the outpatient department, the examination of myocarditis mainly includes electrocardiogram, cardiac ultrasound, blood tests, and myocardial enzyme spectrum. These tests can help doctors determine whether a patient has myocarditis and assess the severity of the condition.
4、 The treatment of myocarditis is mainly divided into three parts: general treatment, medication treatment, and symptomatic treatment.
Firstly, there is general treatment. If patients with myocarditis experience arrhythmia, they should maintain absolute bed rest for the next 2-4 weeks. Afterwards, the activity level can be gradually increased. For patients with severe illness and enlarged heart, it is recommended to extend their rest time to six months to one year until their clinical symptoms disappear and their heart size returns to normal.
Next is medication treatment. There are mainly three types of drugs: one is antiviral drugs, such as acyclovir and famciclovir, which can inhibit the virus and regulate immunotherapy; The second is myocardial protection therapy, which uses high-dose vitamin C intravenous infusion, coenzyme Q10, trimetazidine and other drugs to protect the myocardium; The third is immunosuppressive therapy. For patients with severe acute complications such as arrhythmia, heart failure, and cardiogenic shock, short-term use of glucocorticoids can be used. Finally, symptomatic treatment is necessary. For heart failure patients, diuretics and vasodilators are the preferred treatments. For patients with complete atrioventricular block, temporary pacemaker implantation may be considered. The above are the main treatment methods for myocarditis, and the actual treatment needs to be selected and adjusted according to the specific condition of the patient.
5、 Preventive measures
1. Preventing virus invasion, especially respiratory and intestinal infections, is the key to preventing myocarditis. To enhance immunity, avoid overwork, and choose appropriate exercise to strengthen the body.
For patients with acute myocarditis, adequate rest is very important. Rest as much as possible before the symptoms disappear and the myocardium returns to normal. For patients with sequelae of myocarditis, they can try to live and work like normal people, but it is not advisable to stay up late for a long time or read books and work until late at night.
3. Patients with myocarditis should pay attention to the intake of high protein and vitamins in their diet, eat more nutritious fruits and vegetables, avoid spicy and stimulating foods as much as possible, and quit smoking and drinking.
To promote myocardial recovery, patients with myocarditis should pay attention to fully absorbing protein and foods rich in vitamins. This will help with the gradual recovery of the condition.
5. Colds often worsen the condition of myocarditis patients, so they should be treated promptly to avoid further damage to the myocardium.
6. In order to facilitate the understanding of the development of the condition, patients with myocarditis need to return to the hospital regularly for follow-up visits, in order to adjust and treat the plan in a timely manner.
Myocarditis is a heart disease that cannot be ignored. By enhancing public awareness and understanding of this disease, taking preventive measures, and adopting an active lifestyle, we can reduce the risk of illness and protect our heart health.