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Relationship between plasma lipid concentrations and coronary artery disease in 496 patients
Insights
Higher cholesterol and triglyceride levels are linked to more severe coronary artery disease (CAD). This study in 496 patients found elevated lipids correlated with the number of blocked coronary arteries.
Area of Science:
- Cardiology
- Clinical Lipidology
- Vascular Medicine
Background:
- Coronary artery disease (CAD) is a leading cause of mortality worldwide.
- Dyslipidemia, characterized by abnormal lipid concentrations, is a major risk factor for atherosclerosis.
- Understanding the relationship between specific lipid profiles and CAD severity is crucial for risk stratification.
Purpose of the Study:
- To investigate the association between fasting plasma cholesterol and triglyceride levels and the extent of coronary artery disease.
- To determine if lipid concentrations correlate with the number of diseased coronary vessels.
Main Methods:
- A cohort of 496 patients undergoing coronary arteriography for chest pain evaluation was studied.
- Patients were categorized based on the presence and severity of coronary artery stenosis (obstruction).
- Fasting plasma cholesterol and triglyceride concentrations were measured and correlated with the number of stenotic vessels.
Main Results:
- Patients with CAD exhibited significantly higher mean cholesterol and triglyceride concentrations compared to those without CAD (P < 0.001).
- Cholesterol levels showed a progressive increase with the number of affected coronary vessels in both males and females.
- Triglyceride levels also demonstrated a progressive increase, though less consistently.
- Partial correlation analysis revealed a positive association between cholesterol/triglyceride concentrations and the number of vessels involved (r = +0.201 and +0.181, respectively) at ≥25% obstruction.
Conclusions:
- Elevated fasting plasma cholesterol and triglyceride concentrations are associated with the presence and severity of coronary artery disease.
- Lipid profiles, particularly cholesterol, demonstrate a graded relationship with the extent of coronary atherosclerosis.
- These findings reinforce the importance of lipid management in preventing and treating CAD.
Abstract:
The relationship between fasting plasma cholesterol and triglyceride concentrations and the frequency and extensiveness of coronary artery disease (CAD) was studied in 496 subjects evaluated for chest pain by coronary arteriography at The Methodist Hospital. One hundred six of the patients had no CAD while 390 had 25% or greater stenosis of one or more major vessels. Ninety-one percent had 75% or greater stenosis of at least one major vessel. Mean age for the group with CAD was 55.7 +/- 8.7 and without disease 49.4 +/- 11.6 (P less than 0.01). Both cholesterol and triglyceride concentrations were higher (P less than 0.001) in the group with CAD. Mean cholesterol concentration in males increased from 195 +/- 36 mg/dl in the group without CAD to 219 +/- 41 in the group with three vessel disease and in females from 207 +/- 40 to 252 +/- 42. A progressive increase in triglyceride values was also detected but was less consistent. At the level of 25% and greater obstruction, the partial correlation coefficients between the number of vessels involved and the cholesterol and triglyceride concentrations, respectively, were +0.201 and +0.181.