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Pericardial involvement in acute myocardial infarction in the post-thrombolytic era: clinical meaning and value
E Correale1, A P Maggioni, S Romano
1Ospedale Civile di Caserta, Milan, Italy.
Abstract:
Pericardial involvement (PI) in acute myocardial infarction (AMI) is a complication usually considered benign and has therefore received less attention than those more severe. It may be easily missed because it presents few symptoms and signs, which in turn may be confused with those of AMI. Its pathophysiology, diagnosis, and pitfalls are discussed. The GISSI-1 trial revealed a marked reduction of PI in the group treated with thrombolysis. This unexpected finding was later confirmed by the GISSI-2 trial and by other studies, drawing attention to its meaning. Data from the GISSI as well as from other studies have been reviewed and seem to indicate that PI is associated with larger AMIs and with a significant increase in 6- and 12-month mortality. This may be attributed to the consequences of late remodeling of a large infarction. These findings lead to the conclusion that PI should be granted more attention, and that it might identify patients with a poorer long-term outcome.
Insights
Pericardial involvement in acute myocardial infarction, often overlooked, is linked to larger heart attacks and increased mortality. This finding suggests it may indicate a poorer long-term prognosis for patients.
Area of Science:
- Cardiology
- Clinical Medicine
- Pathophysiology
Background:
- Pericardial involvement (PI) in acute myocardial infarction (AMI) is often underestimated and overlooked due to subtle presentation.
- Its clinical significance and association with patient outcomes have not been extensively studied.
Purpose of the Study:
- To review the pathophysiology, diagnosis, and potential pitfalls of pericardial involvement in AMI.
- To investigate the implications of thrombolysis on PI incidence and its association with AMI severity and long-term mortality.
Main Methods:
- Review of data from the GISSI-1 and GISSI-2 trials, along with other relevant studies.
- Analysis of the impact of thrombolytic therapy on the occurrence of PI.
- Evaluation of the relationship between PI, AMI size, and mortality rates at 6 and 12 months.
Main Results:
- Thrombolysis significantly reduced the incidence of PI in patients with AMI.
- Pericardial involvement is associated with larger acute myocardial infarctions.
- PI is linked to a significant increase in 6- and 12-month mortality.
Conclusions:
- Pericardial involvement in AMI, contrary to previous assumptions, is not benign.
- PI may serve as a marker for larger infarcts and identify patients at higher risk for adverse long-term outcomes.
- Increased attention to PI in AMI patients is warranted for risk stratification and management.