A six-year study of coxsackievirus B infections in heart disease

Area of Science:

• Virology
• Cardiology
• Infectious Diseases

Background:

• Acute myocarditis and pericarditis are serious cardiac conditions.
• The etiological agents of these conditions are not always identified.
• Coxsackie group B viruses are known to cause various human illnesses.

Purpose of the Study:

• To investigate the association between Coxsackie group B virus infections and acute myocarditis and pericarditis.
• To explore other potential infectious causes of cardiac disease.
• To examine the role of viral infections in chronic cardiac conditions.

Main Methods:

• Virological examination of 385 patients with suspected heart disease and 26 with Bornholm disease over 6 years.
• Complement-fixation tests were used to identify specific infections.
• Analysis focused on acute and chronic cardiac disease cases.

Main Results:

• Coxsackie group B virus infections were associated with at least 50% of acute myocarditis cases.
• These viruses were linked to approximately one-third of acute non-bacterial pericarditis cases.
• Influenza and Mycoplasma pneumoniae were associated with few cardiac illnesses; no infections were found in chronic cardiac disease.

Conclusions:

• Coxsackie group B viruses are a significant etiological factor in acute myocarditis and pericarditis.
• Other viral and bacterial infections play a minor role in these acute cardiac conditions.
• Viral infections do not appear to be implicated in the pathogenesis of chronic cardiac disease.