[Tamponade due to Porphyromonas gingivalis]

Area of Science:

• Infectious Diseases
• Cardiology
• Microbiology

Background:

• Myocardial infarction (MI) management often involves angioplasty and endoprosthesis insertion.
• Cardiac tamponade is a serious complication, typically associated with various etiological factors.
• Infectious causes of tamponade are well-documented but less common in the context of recent cardiac interventions.

Observation:

• A 45-year-old male presented with cardiac tamponade 10 weeks post-angioplasty and endoprosthesis for myocardial infarction.
• Pericardial fluid analysis using RNA 16S investigation and ribotyping identified Porphyromonas gingivalis.
• Porphyromonas gingivalis is a strict anaerobic bacillus primarily associated with periodontal disease.

Findings:

• This case represents the first reported instance of Porphyromonas gingivalis infection leading to cardiac tamponade in a patient with a history of myocardial infarction and intervention.
• The study suggests five potential aetio-pathological mechanisms, including fissure syndrome, malignant tamponade, post-infarction pericardial syndrome, endoprosthesis infection, and infectious tamponade.
• The ribotyping method, utilizing DNA coding for RNA 16S, proved effective in identifying the causative microorganism.

Implications:

• This discovery expands the differential diagnosis for cardiac tamponade in post-MI patients, particularly those with endoprostheses.
• It underscores the importance of considering less common pathogens and potential oral-systemic links in cardiovascular complications.
• The study validates the utility of advanced molecular techniques like RNA 16S sequencing and ribotyping for identifying novel infectious agents in clinical settings.