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Timing and course of leucocyte aggregation in myocardial infarction
A Galante1, A Pietroiusti, B Domenici
1Medical Semiology and Methodology, Tor Vergata University, Rome, Italy.
Insights
Leukocyte aggregation, a measure of white blood cell clumping, is elevated early in myocardial ischemia. This finding suggests it may serve as a biomarker for detecting residual ischemia in heart attack patients.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Pathophysiology
Background:
- Myocardial ischemia, a critical condition resulting from reduced blood flow to the heart muscle, necessitates accurate diagnostic markers.
- Leukocyte rheology, specifically leukocyte aggregation, plays a role in inflammatory processes and microvascular function, potentially impacting ischemic conditions.
Purpose of the Study:
- To investigate the pathophysiological relevance and clinical implications of leukocyte aggregation in patients experiencing myocardial ischemia.
- To determine if elevated leukocyte aggregation can serve as an early indicator of myocardial infarction and residual ischemia.
Main Methods:
- Measured the percentage of aggregated leukocytes in 43 subjects presenting with acute substernal pain before diagnosis.
- Compared leukocyte aggregation levels between patients diagnosed with myocardial infarction, angina, and non-ischemic chest pain.
- Assessed leukocyte aggregation in 46 hospitalized myocardial infarction patients, differentiating between those with and without residual ischemia.
Main Results:
- Significantly higher percentages of aggregated leukocytes were observed in patients with myocardial infarction compared to those with angina or non-ischemic chest pain (p < 0.01).
- Patients with myocardial infarction exhibiting residual ischemia showed significantly higher leukocyte aggregation than those without residual ischemia (p < 0.01).
- Leukocyte aggregation was found to be precociously increased following myocardial ischemia.
Conclusions:
- Leukocyte aggregation is an early indicator that increases following myocardial ischemia.
- The percentage of aggregated leukocytes may serve as a valuable biomarker for identifying residual ischemia in patients diagnosed with myocardial infarction.
Abstract:
In order to evaluate the pathophysiological relevance and clinical implications of leukocyte rheology in myocardial ischaemia we measured the percentage of aggregated leukocytes in 43 subjects with acute substernal pain before diagnosis. The percentage of aggregated leukocytes was significantly higher in 16 patients with subsequent diagnosis of myocardial infarction with respect to 11 with angina and 16 with non ischaemic chest pain (4.75 +/- 0.88, 3.43 +/- 0.65 and 1.52 +/- 0.32 respectively p < 0.01). The percentage of aggregated leukocytes was also evaluated in another group of 46 patients hospitalized for myocardial infarction. Among these, aggregated leukocytes were significantly higher in those with residual ischaemia, with respect to those without residual ischaemia (7.4 +/- 1.1 vs 3.5 +/- 0.6, p < 0.01). In conclusion, leukocyte aggregation is precociously increased after myocardial ischaemia. It may be a marker of residual ischaemia in patients with myocardial infarction.