Survival with total occlusion of the left main coronary artery. Significance of the collateral circulation
β Scribed by Valle, M. ;Virtanen, K. ;Hekali, P. ;Frick, M. H.
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 899 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0098-6569
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β¦ Synopsis
Four patients with total occlusion of the left main coronary artery are described. Angina pectoris was severe (NYHA class 3--4) and had lasted 20 months to seven years. Three patients had experienced a myocardial infarction. All displayed large collaterals arising from a nearly normal right coronary artery and feeding both the left anterior descending and the left circumflex arteries. The left ventricular ejection fractions ranged from 20% to 65%, and all patients had varying degrees of left ventricular asynergy. Coronary artery bypass surgery resulted in a marked improvement in three patients; one patient who underwent an aneurysmectomy died two months after the operation. The data show that total occlusion of the left main coronary artery is compatible with survival if adequate collateral supply develops from the right coronary artery. In this rare angiographic subset collateral circulation is clearly functionally significant.
π SIMILAR VOLUMES
The conus artery has long been recognized as an important source of collateral blood supply to a significantly diseased left anterior descending artery. This artery which arises 50% of the time from a separate orifice in the right sinus of Valsalva may also provide collateral circulation to a diseas
Chronic total left main coronary artery occlusion at angiography is very rare, and there are only four cases reported with concomitant total right coronary artery occlusion. We describe a case of total left main and proximal right coronary artery occlusion and review the clinical and angiographic ch