Symptoms of cardiomyopathy 1. Viral myocarditis is a non-specific interstitial inflammation of the myocardium caused by human infection with a cardiophilic virus. Symptoms of cardiomyopathy may appear during the symptomatic or recovery phase of an upper respiratory tract infection or intestinal infection. If present during the symptomatic phase of the primary illness, its manifestations can be masked by these primary illnesses, which can easily lead to a missed diagnosis. Most patients have symptoms such as fever, sore throat, cough, generalized aches and pains, and diarrhea before the onset of the disease, but some patients have mild and insignificant symptoms of the primary disease and must be carefully pursued to be noticed. 2. About 90% of clinically diagnosed myocarditis have arrhythmia as the main complaint or first symptom, and a few of these patients may experience syncope or A – S syndrome as a result. Very few patients develop rapidly after the onset of the disease and will develop heart failure or cardiogenic shock. Therefore, viral myocarditis has specific cardiac symptoms such as panic, chest tightness, chest pain, arrhythmia, and in severe cases, syncope, shortness of breath, and dyspnea. Therefore, patients with preexisting colds or intestinal infections who develop the above cardiomyopathy symptoms should be alerted to the possibility of secondary viral myocarditis and should be seen by a cardiologist in a timely manner. Symptoms of myocarditis Myocarditis can occur in people of all ages, with a high incidence in young adults. For infectious causes of myocarditis, there are often manifestations of the primary infection first, such as fever, sore throat, cough, vomiting, diarrhea, and muscle aches in viral cases, and most of the symptoms of myocarditis appear 1 to 3 weeks after the viral infection. Regardless of the cause of myocarditis, the clinical symptoms of myocarditis are related to the characteristics of myocardial damage, such as palpitations, blackouts and syncope in severe cases if arrhythmia is the main manifestation; various symptoms of heart failure such as dyspnea in those with heart failure as the main manifestation; cardiogenic shock and shock-related manifestations in severe cases; chest tightness and chest pain if the inflammation involves the pericardium and pleura; some patients may also have symptoms similar to those of myocarditis. Some patients may also have angina-like symptoms. Common signs, sinus tachycardia and body temperature are not parallel, but also sinus bradycardia and various arrhythmias, the enlarged heart border accounts for 1/3 to 1/2, which is seen in severe myocarditis, because the enlarged heart can lead to mitral or tricuspid valve incompetence, systolic murmur in the apical region or the left lower sternal border, diastolic gallop rhythm can be heard in severe myocardial damage or heart failure, the first heart sound is diminished, combined with pericarditis can be heard In mild cases, the heart may be completely asymptomatic, and sudden death may occur.