Influence of angiotensin-converting enzyme inhibition by fosinopril on myocardial perfusion in streptozotocin-diabetic rats.

Abstract:

:We examined the influence of the new angiotensin-converting enzyme inhibitor (ACEI) fosinopril on function and perfusion of the diabetic rat heart. Streptozotocin-diabetic rats (60 mg/kg body weight) were treated with fosinopril (10 mg/kg body weight/day) for 4 months. Cardiac performance was analyzed in the isolated heart perfused at constant volume. Epicardial perfusion was determined by measuring epicardial fluorescence changes after injection of FITC-dextrane (3 kDa) as described previously. As compared with controls, fosinopril prevented or diminished the increase in end-diastolic pressure (EDP), coronary perfusion pressure (CPP), and vascular resistance in diabetes. The intravascular volume strongly reduced in diabetes was increased, and the epicardial perfusion rate was accelerated in hearts of diabetic rats treated with fosinopril. The vascular exchange diminished in hearts of untreated diabetic rats was enhanced, and the transcapillary permeability was slightly accelerated at low flow rates. These data indicate that treatment of streptozotocin-diabetic rats with fosinopril prevents severe disturbances of coronary autoregulation and at least partly the impairment of cardiac perfusion generally observed in diabetic rats. Together with previously published morphological data demonstrating an inhibition of interstitial and perivascular fibrosis in hearts of diabetic rats with fosinopril, our observations suggest that ACE inhibition by fosinopril is cardioprotective in diabetes.

journal_name

J Cardiovasc Pharmacol

authors

Rösen P,Rump AF,Rösen R

doi

10.1097/00005344-199601000-00011

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

64-70

issue

1

eissn

0160-2446

issn

1533-4023

journal_volume

27

pub_type

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