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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
Carotid Intima-Media Thickness and Its Correlation With Echocardiographic Left Ventricular Function and Geometry in
Mariam Inuwa1, Janet N Ajuluchukwu1, Akinsanya Olusegun-Joseph1
1Internal Medicine, Lagos University Teaching Hospital, Lagos, NGA.
Insights
In hypertensive patients, abnormal carotid intima-media thickness (CIMT) is linked to changes in left ventricular geometry and diastolic dysfunction. Evaluating CIMT aids in targeted blood pressure control to reduce cardiovascular disease risk.
Area of Science:
- Cardiology
- Vascular Biology
- Hypertension Research
Background:
- Left ventricular hypertrophy (LVH) and carotid intima-media thickness (CIMT) are key indicators of cardiovascular risk in hypertensive patients.
- These conditions often develop concurrently, necessitating a comprehensive risk assessment.
Purpose of the Study:
- To investigate the relationship between CIMT and left ventricular geometry and function in hypertensive individuals.
- To determine if CIMT can serve as a marker for cardiovascular risk in this population.
Main Methods:
- A cross-sectional study involving 200 hypertensive patients at Lagos University Teaching Hospital.
- Data collection included demographic information, physical examination, transthoracic echocardiography, and CIMT measurements.
- Statistical analysis was performed to correlate CIMT with left ventricular parameters and diastolic function.
Main Results:
- Left ventricular geometry was significantly associated with abnormal CIMT (p < 0.001), with higher left ventricular mass index in those with abnormal CIMT.
- While systolic function parameters showed no significant difference, CIMT was significantly associated with grades of diastolic dysfunction (p = 0.029).
- Specific diastolic dysfunction parameters, including left atrial volume index, were significantly different between groups.
Conclusions:
- An association exists between age, left ventricular geometry, diastolic function, and CIMT in hypertensive individuals.
- Evaluating CIMT in hypertensive patients is beneficial for risk stratification.
- Targeted blood pressure control, informed by CIMT assessment, may mitigate cardiovascular disease risks.
Abstract:
Background It is important to consider left ventricular hypertrophy (LVH) and carotid intima-media thickness (CIMT) in assessing hypertensive patients' global cardiovascular risk profile, as LVH and arterial wall changes occur concurrently. This study aimed to assess the relationship between CIMT and left ventricular geometry and function in hypertensive patients. Methodology This cross-sectional study included 200 hypertensive individuals and sought to correlate their CIMT with left ventricular geometry and function in Lagos University Teaching Hospital. Hypertension was defined as blood pressure ≥140/90 mmHg or on treatment for hypertension presenting at the outpatient clinics. Patients who satisfied the inclusion criteria were recruited. Abnormal CIMT was defined as >0.9 mm. Patients' demographic data were obtained in addition to general characteristics, physical examination, transthoracic echocardiography, and CIMT. The statistical relationship between CIMT and left ventricular geometry and function was obtained and analyzed. Results Normal geometry and LVH were observed in 50.5% and 15.5%, respectively. Left ventricular geometry was associated with abnormal CIMT (χ2 = 31.688, p < 0.001). Furthermore, the mean left ventricular mass index was statistically different between abnormal and normal CIMT (97.84 ± 30.5 vs. 80.75 ± 15.6; p < 0.001). Regarding left ventricular function, there was no significant difference in E-point septal separation, left ventricular fractional shortening, and left ventricular ejection fraction in abnormal versus normal CIMT groups. However, there was a significant association of CIMT with grades of diastolic dysfunction (χ2 = 7.069, p = 0.029). Additionally, individual parameters of diastolic dysfunction such as left atrial volume index and septal mitral were significantly different (p < 0.001). Conclusions There was an association between age, left ventricular geometry, diastolic function, and CIMT in hypertensive individuals. Therefore, it is beneficial to evaluate CIMT and for these patients to receive more targeted blood pressure control which may reduce the risk of cardiovascular diseases.
