The prognostic value of admission mean platelet volume to platelet count ratio in patients with ST-segment elevation myocardial infarction undergoing primary percutaneous coronary intervention
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Study Overview: The Role of MPV/Plt Ratio in STEMI
This prospective clinical study aims to determine whether the MPV/Plt ratio (Mean Platelet Volume to Platelet Count ratio) measured on admission has any predictive value for major adverse cardiac events (MACE). The research specifically focuses on both short-term and long-term mortality in patients presenting with ST-elevation myocardial infarction (STEMI).
Methodology and Patient Classification
The study enrolled 470 STEMI patients who underwent primary percutaneous coronary intervention (PCI). To analyze the data effectively, patients were categorized into three distinct tertiles based on their MPV/Plt ratio levels upon admission. This classification allows for a structured comparison of clinical outcomes across different ratio thresholds.
| Group | MPV/Plt Ratio Range | Number of Patients (n) |
|---|---|---|
| First Tertile | ≤ 0.029 | 149 |
| Second Tertile | 0.029 - 0.038 | 154 |
| Third Tertile | ≥ 0.038 | 159 |
Clinical Outcome Definitions
The researchers monitored two types of clinical outcomes to assess the predictive power of the ratio:
- Primary Clinical Outcomes: The composite of cardiovascular (CV) mortality, non-fatal re-infarction, and stroke.
- Secondary Clinical Outcomes: CV mortality, non-fatal re-infarction, target-vessel revascularisation, stroke, and advanced heart failure.
Analysis of Clinical Results
The findings indicated that there was no significant difference between the study groups regarding the primary and secondary outcomes (p > 0.05). However, a critical exception was noted in the one-year non-fatal re-infarction rate. This specific rate was found to be significantly higher in the group with the highest MPV/Plt ratio (p = 0.045).
Independent Predictors of Long-term Mortality
While the MPV/Plt ratio showed limited predictive value for overall mortality, the multivariate analysis identified other factors as independent predictors of long-term CV mortality:
- Age (p = 0.009)
- Killip class > 1 (p = 0.035)
- Left ventricular ejection fraction (LVEF) (p < 0.001)
Conclusion on MPV/Plt Ratio Utility
In conclusion, the MPV/Plt ratio is demonstrated to be associated with one-year non-fatal re-infarction in STEMI patients undergoing primary PCI. Nevertheless, the study confirms that this ratio is not related to in-hospital, one-month, or one-year cardiovascular mortality. These results suggest that while the ratio may signal certain risks, it does not serve as a primary predictor for mortality in this patient group.
