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Published on: January 28, 2020
Predictive value of the relative lymphocyte count in coronary heart disease
1Department of Cardiology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China.
Insights
A decreased percentage of lymphocytes (L%) may indicate physiological stress in coronary heart disease (CHD) patients. This study found low L% is an independent predictor for acute coronary syndrome (ACS) and major adverse cardiac events (MACE) in CHD.
Area of Science:
- Cardiology
- Hematology
- Clinical Medicine
Background:
- Physiological stress in coronary heart disease (CHD) can alter leukocyte differential counts.
- A decreased percentage of lymphocytes (L%) is a potential indicator of this stress.
Purpose of the Study:
- To investigate the prognostic significance of a low L% in patients with CHD.
- To determine if low L% predicts adverse cardiac events.
Main Methods:
- Retrospective review of 140 CHD patients (2007-2008).
- Analysis included patients undergoing primary or elective percutaneous coronary intervention (PCI).
- Statistical analyses (univariate, multivariate, logistic regression) examined associations between L%, clinical characteristics, and outcomes.
Main Results:
- Low L% was significantly associated with acute coronary syndrome (ACS) compared to stable CHD.
- White blood cell (WBC) count, C-reactive protein (CRP), and left ventricular systolic dysfunction (LVSD) also correlated with CHD.
- L%, CRP, WBC count, and LVSD were independent predictors of CHD and 1-year major adverse cardiac events (MACE).
Conclusions:
- A low L% serves as an independent predictor for ACS upon admission in CHD patients.
- Low L% is associated with MACE during clinical follow-up for CHD patients.
- L% offers prognostic value in managing CHD patients.
Abstract:
The physiological stress suffered by patients with coronary heart disease (CHD) may result in a shift in leukocyte differential toward a decreased percentage of lymphocytes (L%). The purpose of this study was to determine the prognostic value of a low L% in CHD. One hundred forty patients evaluated in our department between 2007 and 2008 were retrospectively reviewed. Thirty-eight patients had primary percutaneous coronary intervention (PCI), and 102 patients had elective PCI. Various statistical analyses were used to examine the association between a low L% or other clinical characteristics and CHD. Univariate analysis showed that low L% was significantly related to ACS compared with stable CHD or control. White blood cell (WBC) count, C-reactive protein (CRP) and left ventricular systolic dysfunction (LVSD) were also correlated with CHD. Multivariate analysis and logistic regression analysis revealed that L%, CRP, WBC count and LVSD were all independently significant risk factors to have predictive value for CHD and 1 year major adverse cardiac events (MACE). A low L% could be used as an independent predictor for ACS on admission and is associated with MACE during clinical follow-up in CHD patients.
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