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Echocardiographic diagnosis of left anterior descending coronary artery disease
Insights
Abnormal septal motion on echocardiogram, specifically a posterior wall/interventricular septal excursion ratio ≥ 2.5, is a useful indicator for diagnosing proximal left anterior descending coronary artery disease. This finding aids in differentiating disease location, crucial for effective treatment strategies.
Area of Science:
- Cardiology
- Diagnostic Imaging
Background:
- Coronary artery disease (CAD) diagnosis often requires invasive procedures.
- Non-invasive methods for localizing CAD are valuable for patient management.
Purpose of the Study:
- To assess the diagnostic utility of standard echocardiography.
- To differentiate proximal versus distal left anterior descending (LAD) coronary artery disease.
Main Methods:
- Coronary arteriograms and echocardiograms were performed in 77 patients presenting with chest pain.
- Septal motion was analyzed using the posterior wall/interventricular septal (PW/IVS) excursion ratio.
Main Results:
- Abnormal septal motion (PW/IVS ratio ≥ 2.5) was observed in 79% of patients with proximal LAD disease.
- Only 10% of patients with distal LAD disease and 5% without obstructive disease showed abnormal septal motion.
- Abnormal septal motion strongly correlated with proximal LAD disease (79% of cases).
Conclusions:
- Abnormal septal motion, as measured by the PW/IVS excursion ratio, is a valuable echocardiographic index.
- This index effectively identifies left anterior descending coronary artery disease proximal to the first septal branch.
Abstract:
To determine the usefulness of the standard echocardiogram in the diagnosis of left anterior descending coronary artery disease proximal or distal to the first septal branch, coronary arteriograms and echocardiograms were performed in 77 patients with a chest pain syndrome. Seventy-nine percent of patients with proximal disease (15 of 19) had an abnormal septal motion measured as a posterior wall/interventricular septal (PW/IVS) excursion ratio greater than or equal to 2.5 compared with 10% of patients with distal disease (2 of 20) who had abnormal septal motion. Only 5% of patients without obstructive disease of the left anterior descending coronary artery (2 of 38) had abnormal septal motion. Proximal disease was found in 79% with abnormal septal motion in the echocardiogram (15 of 19) but in only 7% of patients with normal septal motion (4 of 58). Therefore, abnormal septal motion as measured by the PW/IVS excursion ratio in the echocardiogram is a useful index for the diagnosis of disease of the left anterior descending coronary artery when that disease is proximal to the first septal branch.