Isolated and significant left main coronary artery disease: demographics, hemodynamics and angiographic features
Nitin Mahajan1, Gerald Hollander, Bilal Malik
1Department of Medicine, Maimonides Medical Center, Brooklyn, NY, USA. nmahajan@maimonidesmed.org
Insights
Isolated and significant left main coronary artery (ILMCA) disease is predominantly caused by atherosclerosis, not other factors. This largest study found ILMCA disease more common in women, with diabetes linked to distal lesions.
Area of Science:
- Cardiology
- Vascular Medicine
- Medical Research
Background:
- Left main coronary artery disease (LMCA) has a poor prognosis.
- The causes of isolated and significant left main coronary artery (ILMCA) disease remain unclear.
- Previous studies on ILMCA disease were limited by small sample sizes.
Purpose of the Study:
- To investigate the etiology and characteristics of ILMCA disease.
- To compare demographic and risk factor profiles of patients with ILMCA disease versus other coronary artery disease patients.
- To analyze differences between ostial and distal ILMCA disease.
Main Methods:
- Retrospective analysis of a 10-year database.
- Identification of 46 patients with ILMCA disease (Group I) and comparison with 83 control patients (Group II).
- Comparison of ostial versus distal ILMCA disease subgroups.
Main Results:
- ILMCA disease constituted 0.1% of all catheterization procedures.
- Atherosclerotic risk factors were prevalent in ILMCA patients.
- Non-atherosclerotic causes were not identified.
- ILMCA disease was more frequent in women.
- Diabetes mellitus was associated with distal ILMCA lesions.
- A trend suggested ostial ILMCA lesions were more common in smokers and women.
Conclusions:
- Coronary atherosclerosis is the primary cause of ILMCA disease.
- ILMCA disease exhibits distinct demographic and risk factor associations.
- Further research is warranted to understand specific lesion site associations.
Abstract:
Left main coronary artery disease carries a poor prognosis. The etiology of isolated and significant left main coronary artery (ILMCA) disease is not well understood. Studies so far were limited by small numbers. The authors identified 46 patients with ILMCA disease from their database over 10 years (group I) and compared them with 83 consecutive patients undergoing catheterization (group II). They also compared patients with ostial vs distal ILMCA disease. Group I represented 0.1% of catheterization patients. The demographic profile and atherosclerotic risk factor profile of the 2 groups as well as ostial and distal ILMCA disease were compared. This is the largest study of ILMCA disease. Risk factors for atherosclerosis were commonly seen. Nonatherosclerotic causes of ILMCA disease were not seen. This study suggests coronary atherosclerosis as the predominant cause of ILMCA disease. ILMCA disease is more common in women. Diabetes is more commonly associated with distal ILMCA lesion. There is a trend suggesting that ostial ILMCA lesion is more common in smokers and women.
Related Concept Videos
01:30Coronary Artery Disease III: Clinical Manifestations
01:24Cardiac Catheterization III: Left Heart Catheterization
01:30Acute Coronary Syndrome III: Diagnostic Studies
01:21Coronary Circulation
Coronary circulation begins at the base of the aorta, where two main arteries arise—the left and right coronary arteries. These arteries encircle the heart in the coronary sulcus and supply the...
01:30Coronary Artery Disease I: Introduction
01:17Ischemic Heart Disease: Overview
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...