Cited by 66Cardiovascular Function and Risk FactorsDiabetes, Cardiovascular Risks, and LipoproteinsCardiovascular and exercise physiology

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Effects of insulin-glucose infusion on left ventricular function at rest and during dynamic exercise in healthy subjects and noninsulin dependent diabetic patients

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Abstract

Objectives The aim of this study was to evaluate: 1) the effects of insulin administration on left ventricular ejection fraction (LVEF) during exercise, and 2) the eventual impairment of the cardiovascular response to insulin in noninsulin dependent diabetes mellitus. Background Insulin influences the cardiovascular system, but its effect on left ventricular function has yet to be established. Methods The effects of normal saline (test A) and insulin-glucose (insulin = 1.7 mU x kg(-1) x min(-1); glucose = 6 mg x kg(-1)min(-1)) (test B) infusions on systolic and diastolic functions at rest and during dynamic exercise were examined by radionuclide ventriculography. Twenty-two noninsulin-dependent diabetic patients and 22 gender, age and body mass index matched healthy subjects were investigated. Results Both groups had normal scintigraphic parameters at rest and during dynamic exercise. Rest- and stress-LVEF as well as rest- and stress-peak filling rate were significantly (p < 0.001) lower in diabetic than in healthy subjects, both in test A and B. Rest-LVEF was significantly higher during test B than it was in test A only in diabetic subjects (p < 0.01). Stress-LVEF was significantly higher (p < 0.05) during test B than it was in test A, in both groups. Insulin-glucose infusion did not modify rest- and stress-peak filling rate in either group. No difference in left ventricular end diastolic volume and in mean blood pressure was found between test A and B at rest and during exercise in either group. A significant linear correlation between LVEF and the index of insulin sensitivity was found in diabetic patients. Conclusions In both normal and diabetic humans, insulin induces a very important rise in LVEF after submaximal work. However, the rise is significantly lower in diabetic than in nondiabetic subjects. The increase in exercise-LVEF on insulin is likely due to an enhancement of ventricular contractility. Insulin resistance could justify the lower angioscintigraphic indexes in diabetic subjects.

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Metadata

Authors
Sasso, F. C., Carbonara, O., Cozzolino, D., Rambaldi, P., Mansi, L., Torella, D., Gentile, S., Turco, S., Torella, R., & Salvatore, T.
Affiliations
  • University of Campania "Luigi Vanvitelli" (IT)
  • University of Naples Federico II (IT)
  • Federico II University Hospital (IT)
Corresponding author
Sasso, Ferdinando Carlo
Venue
Journal of the American College of Cardiology
Publisher
Elsevier BV
Published
2000-07
Volume
36
Issue
1
Pages
219-226
ISSN
0735-1097 (ISSN-L)
OpenAlex
W27722483
Cited by
66
References
0
Citations by year
2025: 2 · 2024: 8 · 2023: 6 · 2022: 4 · 2020: 3 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 1
FWCI
2.00
Type
journal article
Language
en
Open access
Locations
  • Journal of the American College of Cardiology (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca - Università degli Studi della Campania "Luigi Vanvitelli" (submittedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Function and Risk Factors
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
Keywords
insulin, glucose infusion, left ventricular ejection fraction, left ventricular function, physical activity, type 2 diabetes, insulin resistance, insulin sensitivity, ventricular contractility, diastolic filling rate, radionuclide ventriculography
MeSH terms
Adult, Blood Pressure, Diabetes Mellitus, Type 2, Drug Combinations, Electrocardiography, Exercise Test, Female, Glucose, Heart Rate, Heart Ventricles, Humans, Hypoglycemic Agents, Infusions, Intravenous, Insulin, Male, Myocardial Contraction, Prognosis, Rest, Exercise, Radionuclide Ventriculography, Ventricular Function, Left, Ventricular Dysfunction, Left

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