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C-reactive protein as a predictor of cardiac rupture after acute myocardial infarction
1Department of Cardiology, Jichi Medical School, Tochigi, Japan.
Insights
High C-reactive protein (CRP) levels can predict cardiac rupture after myocardial infarction. Persistently elevated CRP, especially above 20 mg/dl, indicates a high risk for this fatal complication.
Area of Science:
- Cardiology
- Biomarkers
- Inflammation
Background:
- Cardiac rupture is a leading cause of mortality post-myocardial infarction.
- Predictive factors and early diagnosis remain challenging.
- No reliable biomarkers have been identified for subacute cardiac rupture.
Purpose of the Study:
- To investigate serum C-reactive protein (CRP) as a predictive marker for subacute cardiac rupture following acute myocardial infarction.
- To assess the diagnostic accuracy of CRP levels in identifying patients at risk.
Main Methods:
- Retrospective comparison of nine patients with cardiac rupture against 28 control patients without rupture after myocardial infarction.
- Analysis of peak serum CRP and creatine phosphokinase levels.
- Evaluation of CRP levels (> 20 mg/dl) for diagnostic sensitivity and specificity.
Main Results:
- Patients with cardiac rupture showed rapid, marked, and persistent increases in peak serum CRP levels (> 20 mg/dl) post-infarction.
- Serum creatine phosphokinase levels did not differ significantly between groups.
- High CRP levels (> 20 mg/dl) demonstrated 89% sensitivity and 96% specificity for cardiac rupture.
Conclusions:
- Persistently high serum CRP levels, particularly above 20 mg/dl, are highly predictive of subacute cardiac rupture after myocardial infarction.
- CRP serves as a valuable diagnostic and predictive biomarker for cardiac rupture.
- Early identification of high-risk patients may enable timely intervention.
Abstract:
Although cardiac rupture is the second most common cause of death after ventricular failure in acute myocardial infarction, no diagnosis has ever been made before an episode of clinical compromise, and no significant predictive factors have been described. This study was designed to determine whether high serum C-reactive protein (CRP) levels could predict the incidence of subacute cardiac rupture after acute myocardial infarction. Nine consecutive patients with cardiac rupture were compared retrospectively with 28 consecutive control patients without rupture after acute myocardial infarction. In the rupture group, peak serum CRP levels increased rapidly and markedly after infarction, reaching more than 20 mg/dl on day 2, and persisted at high levels compared with those in the control group. However, the time course and levels of serum creatine phosphokinase were not significantly different between the two groups. High serum CRP levels ( > 20 mg/dl) had a high diagnostic sensitivity (89%) and specificity (96%) for cardiac rupture. Patients with persistently high serum CRP levels, particularly above 20 mg/dl, might have high probability of occurrence of sub-acute cardiac rupture after acute myocardial infarction.