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Relationship between mean platelet volume and coronary blood flow in patients with atrial fibrillation
Chong Feng1, Weiyi Mei, Chufan Luo
1Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. chongfeng1970@yahoo.com.cn
Insights
Mean platelet volume (MPV) is elevated in atrial fibrillation (AF) patients and correlates with impaired coronary blood flow (TIMI frame count). This suggests MPV may be an independent marker for coronary blood flow issues in AF without obstructive coronary artery disease.
Area of Science:
- Cardiology
- Hematology
- Vascular Biology
Background:
- Atrial fibrillation (AF) is linked to reduced coronary blood flow, measured by Thrombolysis in Myocardial Infarction (TIMI) frame count (TFC).
- Elevated mean platelet volume (MPV) is a known characteristic of patients with AF.
- The relationship between MPV and coronary blood flow in AF patients lacking obstructive coronary artery disease (CAD) requires further investigation.
Purpose of the Study:
- To investigate the association between mean platelet volume (MPV) and coronary blood flow (TFC) in patients diagnosed with atrial fibrillation (AF).
- To specifically examine this relationship in individuals without obstructive coronary artery disease (CAD).
- To identify potential independent predictors of MPV in the context of AF and coronary blood flow.
Main Methods:
- An observational study involving 185 patients with AF and 189 control subjects.
- All participants underwent diagnostic coronary angiography to confirm normal coronary arteries.
- Mean platelet volume (MPV) was measured at baseline, and mean Thrombolysis in Myocardial Infarction (TIMI) frame count (TFC) was assessed.
Main Results:
- Patients with AF exhibited significantly higher MPV (9.95±1.32) compared to controls (9.02±1.16) (p<0.001).
- In AF patients, MPV showed significant correlations with mean TFC (r=0.419, p<0.001), AF duration, AF classification, hypertension, diabetes mellitus, left ventricular ejection fraction, and diuretic use.
- Linear regression identified mean TFC, left ventricular ejection fraction, and diabetes mellitus as independent factors associated with MPV in AF patients.
Conclusions:
- Mean platelet volume (MPV) appears to be independently associated with coronary blood flow in patients with atrial fibrillation (AF).
- This association exists even in the absence of obstructive coronary artery disease (CAD).
- MPV may serve as a valuable biomarker for assessing coronary blood flow abnormalities in AF patients.
Introduction:
Atrial fibrillation (AF) is associated with impaired coronary flow by means of Thrombolysis in Myocardial Infarction (TIMI) frame count (TFC). Mean platelet volume (MPV) is elevated in patients with AF. In the present study we aimed to investigate the relationship between MPV and TFC in patients with AF in the absence of obstructive coronary artery disease (CAD).
Methods:
This observational study enrolled 185 AF patients and 189 control subjects, all with angiographically documented normal coronary arteries. MPV was measured at baseline and mean TFC was assessed after diagnostic coronary angiography.
Results:
The MPV was 9.95±1.32 in the AF group and 9.02±1.16 in the control group (p<0.001). In AF patients, MPV was significantly correlated with mean TFC (r=0.419, p<0.001), AF duration (r=0.407, p<0.001), AF classification (r=0.378, p<0.001), systemic hypertension (r=0.165, p=0.024), diabetes mellitus (r=0.233, p=0.001), left ventricular ejection fraction (r=-0.347, p<0.001), and baseline use of diuretics (r=0.177, p=0.016). In linear regression analysis, mean TFC, left ventricular ejection fraction and diabetes mellitus were found to be independently associated with MPV (p<0.001, p=0.028 and p=0.045 respectively).
Conclusion:
Mean platelet volume seems to be independently associated with coronary blood flow in patients with atrial fibrillation in the absence of obstructive coronary artery disease.
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