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[Left ventricular hypertrophy. Correlation of ventriculographic findings in ischemic cardiopathy]
Insights
Left ventricular hypertrophy in coronary insufficiency is linked to increased ventricular volume and wall tension. This process is compensatory early on but becomes insufficient in advanced stages of ischemic heart disease.
Area of Science:
- Cardiology
- Cardiovascular Research
- Medical Imaging
Background:
- Coronary insufficiency is a significant factor in cardiovascular disease.
- Left ventricular hypertrophy (LVH) is a common adaptation to cardiac stress.
- Understanding the relationship between coronary artery disease and LVH is crucial for patient management.
Purpose of the Study:
- To analyze angiographic characteristics associated with left ventricular hypertrophy in patients with coronary insufficiency.
- To investigate the correlation between ventricular volumes, ejection fraction (EF), and left ventricular mass (LVM).
Main Methods:
- Left ventriculography was performed on 31 patients with diagnosed ischemic heart disease.
- Patients were categorized into three groups based on coronary artery status and EF.
- Ventricular volumes, EF, and LVM were calculated using left ventriculography.
Main Results:
- Significant negative correlation found between ejection fraction (EF) and left ventricular mass (LVM) (r = -0.7894, p < 0.001).
- Positive correlation observed between telediastolic volume and LVM (r = 0.6806).
- Negative correlation noted between EF and telediastolic volume (r = -0.6991).
Conclusions:
- Hemodynamic changes, particularly increased ventricular volume and wall tension, stimulate metabolic pathways leading to ventricular hypertrophy.
- LVH serves a compensatory function in early stages of ischemic heart disease (Groups A and B).
- LVH becomes insufficient in advanced stages of coronary insufficiency (Group C).
Abstract:
In order to analyze the angiographic characteristics associated with left ventricular hypertrophy in patients with coronary insufficiency, the left ventriculography was used to calculate the ventricular volumes, the ejection fraction (EF) and the ventricular mass (LVM) in 31 patients with clinical diagnosis of ischemic heart disease. Patients were divided into three groups: A) Those with normal coronaries and (EF), B) Those with coronary lesion and EF greater than 50% and C) Those with coronary lesions and EF less than 50%. The following results were obtained for the telediastolic volume (ml/m2), the EF (%) and the LUM (g/m2): Group A = 85 +/- 19, 73 +/- 7 and 41 +/- 13. Group B = 102 +/- 25, 61 +/- 8 and 50 +/- 9. Group C = 154 +/- 27, 39 /+- 7 and 74 +/- 17 respectively. Comparing the FEV with the LVM in the patients studied, a negative correlation was found with an r index of -0.7894 (p less than or equal to 0.001). The correlation index for the diastolic volume and the LVM was r = 0.6806; and -0.6991 for the EF and the telediastolic volume. These findings suggest that hemodinamic changes, especially an increase in the ventricular volume and subsequently in the tension of the ventricular wall, act as a stimulus in initiating a metabolic chain leading to ventricular hypertrophy. This process is compensatory in the initial phases of the disease (groups A and B) but insufficient in the advanced stage (group C).