A study of 4 patients who survived complete occlusion of the left main coronary artery forms the basis for conclusions concerning the functional significance of coronary collateral circulation. Each of these patients had prominent collateral circulation from the right coronary artery. Global left ventricular function was maintained to the extent that congestive heart failure did not occur; the biplane ejection fraction was normal in the 2 patients where measurement was possible. The peak rate of systolic wall thickening by roentgen videometry in anterior left ventricular segments was normal in 1 patient and mild to moderately depressed in another. Experience with the patients described herein indicates that coronary collateral flow can provide critically needed circulatory support for the patient with coronary artery disease.
|Original language||English (US)|
|Number of pages||4|
|Journal||Mayo Clinic proceedings|
|State||Published - Dec 1 1977|
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