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The effects of chronic oral milrinone therapy on early postinfarction left ventricular remodeling.
Am Heart J. 1993 Sep; 126(3 Pt 1):543-51.AH

Abstract

Left ventricular remodeling following acute transmural myocardial infarction may result in early left ventricular enlargement. To characterize the effects of milrinone on components of early left ventricular dilation, rats (n = 120) underwent left coronary artery ligation or sham surgery. In the immediate postoperative period, rats received either no treatment or milrinone (3.17 +/- 0.08 mg/kg/day) dissolved in drinking water for 20 days. Twenty-one days after the initial surgery, hemodynamic measurements were made. The rats were then put to death and the hearts arrested in diastole were excised and fixed at a constant pressure for morphometric analysis. To examine the effects of milrinone on the relative contribution of infarcted and noninfarcted segments to early left ventricular dilation after acute myocardial infarction, a subgroup of infarcted rats chosen randomly was put to death 3 days after the initial surgery for morphometric analysis. Compared with infarcted untreated rats, infarcted milrinone-treated rats had a lower left ventricular volume (1.41 +/- 0.07 ml/kg vs 2.16 +/- 0.19 ml/kg, p < 0.001), lower left ventricular wall stress (0.64 +/- 0.03 vs 0.91 +/- 0.06, p < 0.001), and a lower expansion index (1.61 +/- 0.12 vs 2.61 +/- 0.22, p < 0.001). Morphometric analysis revealed that the noninfarcted segment length did not differ between the two infarcted groups either 3 days or 21 days after left coronary artery ligation. Infarct segment length also did not differ between the two infarcted groups at 3 days, but at 21 days infarct segment was shorter in the milrinone-treated group compared with the untreated group (p < 0.03).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Department of Medicine, State University of New York, Stony Brook 11794-8171.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

8362707

Citation

Jain, P, et al. "The Effects of Chronic Oral Milrinone Therapy On Early Postinfarction Left Ventricular Remodeling." American Heart Journal, vol. 126, no. 3 Pt 1, 1993, pp. 543-51.
Jain P, Hughes M, Korlipara G, et al. The effects of chronic oral milrinone therapy on early postinfarction left ventricular remodeling. Am Heart J. 1993;126(3 Pt 1):543-51.
Jain, P., Hughes, M., Korlipara, G., Lillis, O., Dervan, J. P., & Cohn, P. F. (1993). The effects of chronic oral milrinone therapy on early postinfarction left ventricular remodeling. American Heart Journal, 126(3 Pt 1), 543-51.
Jain P, et al. The Effects of Chronic Oral Milrinone Therapy On Early Postinfarction Left Ventricular Remodeling. Am Heart J. 1993;126(3 Pt 1):543-51. PubMed PMID: 8362707.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effects of chronic oral milrinone therapy on early postinfarction left ventricular remodeling. AU - Jain,P, AU - Hughes,M, AU - Korlipara,G, AU - Lillis,O, AU - Dervan,J P, AU - Cohn,P F, PY - 1993/9/1/pubmed PY - 1993/9/1/medline PY - 1993/9/1/entrez SP - 543 EP - 51 JF - American heart journal JO - Am Heart J VL - 126 IS - 3 Pt 1 N2 - Left ventricular remodeling following acute transmural myocardial infarction may result in early left ventricular enlargement. To characterize the effects of milrinone on components of early left ventricular dilation, rats (n = 120) underwent left coronary artery ligation or sham surgery. In the immediate postoperative period, rats received either no treatment or milrinone (3.17 +/- 0.08 mg/kg/day) dissolved in drinking water for 20 days. Twenty-one days after the initial surgery, hemodynamic measurements were made. The rats were then put to death and the hearts arrested in diastole were excised and fixed at a constant pressure for morphometric analysis. To examine the effects of milrinone on the relative contribution of infarcted and noninfarcted segments to early left ventricular dilation after acute myocardial infarction, a subgroup of infarcted rats chosen randomly was put to death 3 days after the initial surgery for morphometric analysis. Compared with infarcted untreated rats, infarcted milrinone-treated rats had a lower left ventricular volume (1.41 +/- 0.07 ml/kg vs 2.16 +/- 0.19 ml/kg, p < 0.001), lower left ventricular wall stress (0.64 +/- 0.03 vs 0.91 +/- 0.06, p < 0.001), and a lower expansion index (1.61 +/- 0.12 vs 2.61 +/- 0.22, p < 0.001). Morphometric analysis revealed that the noninfarcted segment length did not differ between the two infarcted groups either 3 days or 21 days after left coronary artery ligation. Infarct segment length also did not differ between the two infarcted groups at 3 days, but at 21 days infarct segment was shorter in the milrinone-treated group compared with the untreated group (p < 0.03).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0002-8703 UR - https://www.unboundmedicine.com/medline/citation/8362707/The_effects_of_chronic_oral_milrinone_therapy_on_early_postinfarction_left_ventricular_remodeling_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0002-8703(93)90402-U DB - PRIME DP - Unbound Medicine ER -