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A New Form of Circulatory Assist for Treatment of Cardiogenic Shock

Tzu-Wang Lang, MD; Eliot Corday, MD; Samuel Meerbaum, MS; Jose R. Lozano, MD; Hugo Carrasco, MD; Herbert Gold, MD

Arch Intern Med. 1971;128(2):258-264.

Abstract
Ascending aorta synchronized pulsation (AASP) was found to be simple and effective method of counterpulsation directed at the root of the aorta. It provided excellent mechanical assistance for the treatment of severe cardiogenic shock following coronary artery ligation. Because the proximal site of counterpulsation requires low stroke pump volumes, only minimal hemolysis resulted. The AASP counterpulsation was performed for periods up to 90 minutes in ten dogs. After two minutes a significant increase in coronary flow and reduction in systolic pressures were observed, and after 90 minutes of continued AASP counterpulsation, pressures and flows increased from shock levels toward normotensive control levels and hemodynamic indices improved. These improvements persisted after AASP pumping was stopped in nine dogs, which proved AASP reversed the cardiogenic shock state.

Author Affiliations
Los Angeles

From Cedars-Sinai Medical Center and the Department of Medicine, University of California at Los Angeles School of Medicine, Los Angeles.

Footnotes
Received for publication Oct 12, 1970; accepted March 3, 1971.

Read before the Section on Diseases of the Chest at the 119th annual convention of the American Medical Association, Chicago, June 24, 1970.

Reprint requests to 4751 Fountain Ave, Los Angeles 90029 (Dr. Corday).

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