Clinically there will be such a group of people who often have recurrent colds, sometimes palpitations and palpitations, with a feeling of pain in the precordial region, weakness, dizziness, sweating when moving, purple lips and other discomforts. They feel that it is due to work stress, but in fact, they may have unknowingly developed viral myocarditis, and over time, have shown the sequelae of viral myocarditis symptoms.
The sequelae of viral myocarditis are highly dangerous Patients with viral myocarditis often complain of chest tightness and chest pain, palpitations and palpitations, fatigue, nausea and vomiting, dizziness and other discomforts. Most patients have a history of gastrointestinal or respiratory tract infection 1 to 3 weeks prior to the illness. Infants may also present with refusal to eat, saddle, cold limbs, and staring. At this time, the heart rate may be accelerated and the electrocardiogram may show arrhythmias, which may be accompanied by lowered, flat or inverted ST segments in the main leads. If an X-ray is taken at this time, it often indicates that the heart is spherically enlarged and the atria are enlarged. Laboratory tests may yield increased blood sedimentation, higher values of liver function indicators, and early isolation of the virus from the nasopharynx, stool, blood, and pericardial fluid, with increased antibodies to the virus in the serum during the recovery period.
Arrhythmias are the main complaint or first symptom in about 90% of clinically diagnosed viral myocarditis, with a few patients experiencing syncope as a result, and a very small number of patients developing rapidly after the onset of the disease, with heart failure or cardiogenic shock.
Arrhythmia is one of the main symptoms of the sequelae of viral myocarditis Viral myocarditis is a nonspecific interstitial inflammation of the myocardium caused by human infection with a cardiophilic virus, which can be limited or diffuse in distribution. The course of the disease can be divided into acute, subacute and chronic: (1) acute phase: new onset, symptoms and positive test findings are obvious and variable, and the course of the disease is generally less than six months; (2) extended phase: recurrent clinical symptoms, objective test indicators persist, and the course of the disease is more than six months; (3) chronic phase: progressive heart enlargement, recurrent heart failure or arrhythmias, the disease is sometimes mild and severe, and the course of the disease is more than one year. The majority of patients with acute viral myocarditis recover completely, with a low rate of sudden death, while some patients with chronic development of viral myocarditis can evolve into cardiomyopathy. Some patients are left with sequelae manifesting after significant myocardial scar formation: some degree of cardiac enlargement, cardiac decompensation, arrhythmias or persistent ECG abnormalities.
Among them, arrhythmia is the main symptom of viral myocarditis and appears in various forms, with atrial and ventricular premature beats being the most common, followed by atrioventricular block, in addition to atrial fibrillation and pathological sinus node syndrome. Arrhythmias are one of the causes of sudden death and need more attention.