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Nolan SE, Mannisi JA, Bush DE, et al. Increased afterload aggravates infarct expansion after acute myocardial infarction. J Am Coll Cardiol. 1988;12(5):1318-25doi: 10.1016/0735-1097(88)92616-2.
Nolan, S. E., Mannisi, J. A., Bush, D. E., Healy, B., & Weisman, H. F. (1988). Increased afterload aggravates infarct expansion after acute myocardial infarction. Journal of the American College of Cardiology, 12(5), 1318-25. https://doi.org/10.1016/0735-1097(88)92616-2
Nolan, S E, et al. "Increased afterload aggravates infarct expansion after acute myocardial infarction." Journal of the American College of Cardiology vol. 12,5 (1988): 1318-25. doi: https://doi.org/10.1016/0735-1097(88)92616-2
Nolan SE, Mannisi JA, Bush DE, Healy B, Weisman HF. Increased afterload aggravates infarct expansion after acute myocardial infarction. J Am Coll Cardiol. 1988 Nov;12(5):1318-25. doi: 10.1016/0735-1097(88)92616-2. PMID: 2971704.
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Elsevier Science

J Am Coll Cardiol. 1988 Nov;12(5):1318-25. doi: 10.1016/0735-1097(88)92616-2.

Increased afterload aggravates infarct expansion after acute myocardial infarction.

Journal of the American College of Cardiology

S E Nolan, J A Mannisi, D E Bush, B Healy, H F Weisman

Affiliations

  1. Peter Belfer Laboratory for Myocardial Research, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland.

PMID: 2971704 DOI: 10.1016/0735-1097(88)92616-2
Free Article

Abstract

After acute transmural myocardial infarction, the heart may undergo major remodeling characterized by thinning and dilation of the infarct zone and overall enlargement of the heart. The effect of increased left ventricular pressure on infarct expansion and the extent to which it alters postinfarction remodeling were studied in a rat model. Rats with either aortic banding or a sham operation and a survival period of 3 weeks were further randomized to sham thoracotomy or left coronary ligation. Surviving rats were killed 7 days later and the hearts were fixed in diastole for morphologic analysis. Hearts with aortic banding had a mean peak to peak gradient of 20.7 +/- 4.9 mm Hg across the aortic band at death and a significantly thicker heart than that of the comparison group without an aortic band. Infarct size, as a percent of total left ventricular mass, at the time of death was less in the group with aortic banding, yet infarct expansion was more marked. However, when original infarct size was estimated taking into account the effects of aortic banding, scar formation, infarct expansion and infarct-induced hypertrophy, it was found to be similar in both infarct groups (45.50 +/- 4.2 versus 47.90 +/- 3.1%). Infarct expansion, as measured by cavity dilation and infarct thinning, occurred in both infarct groups but was greater in the group with aortic banding.(ABSTRACT TRUNCATED AT 250 WORDS)

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