Myocarditis (Viral)

Myocarditis (Viral) is an inflammation of the heart muscle caused by a viral infection. It affects the heart, which is responsible for pumping blood throughout the body. This condition can lead to symptoms like chest pain, fatigue, and difficulty breathing due to the heart's reduced ability to pump effectively. The inflammation can damage the heart muscle cells, sometimes causing irregular heartbeats or heart failure. Common viruses that cause this include Coxsackievirus and adenovirus. Early recognition is important because the severity can range from mild to life-threatening. The condition primarily impacts the cardiovascular system and overall heart function.

Myocarditis (Viral) is defined as inflammation of the myocardium, the muscular layer of the heart wall, typically caused by direct viral infection and subsequent immune-mediated injury. The core pathology involves myocyte necrosis and infiltration by inflammatory cells, predominantly lymphocytes. Common causative agents include enteroviruses such as Coxsackievirus B, adenovirus, and less commonly parvovirus B19. The condition can lead to acute heart failure, arrhythmias, and dilated cardiomyopathy if unresolved. Diagnosis is clinically significant due to its potential to cause sudden cardiac death or chronic cardiac dysfunction. The inflammatory process disrupts normal electrical conduction and contractility, impairing cardiac output. Histopathology often reveals lymphocytic infiltration and myocyte damage, which are hallmarks of viral myocarditis.