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April 1, 1995Hypertension

Insulin Attenuates Norepinephrine- Induced Venoconstriction

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Key result

Insulin caused highly reproducible dose-dependent increases in mean venous diameter when combined with norepinephrine compared with norepinephrine alone (P<.001).

Why the study?

Does insulin attenuate norepinephrine-induced venoconstriction in healthy subjects?

Population

16 healthy men and women (10 in the primary dose-response study, 6 in the methylene blue substudy)

Comparison

Insulin infusion combined with norepinephrine… vs Norepinephrine alone (100 ng/min)

Design

Other

Follow-up

5-minute observation periods per dose

Authors

AGAnil GroverUniversity of DelhiCPClay PadgintonMallinckrodt (United States)MWMichael F. WilsonWest Virginia University

Discussion

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Implication

May enable quantitative venomotor assessment; leaves open clinical utility in hypertension pending validation.

Structured PICO

Does insulin attenuate norepinephrine-induced venoconstriction in healthy subjects?

P
Population
16 healthy men and women undergoing venous diameter measurements during norepinephrine and insulin infusions.
I
Intervention
Insulin infusion (8, 16, 24, and 32 μU/min) combined with norepinephrine (100 ng/min) for 5 minutes each
C
Comparator
Norepinephrine alone (100 ng/min)
O
Outcome
Venous diameter measured by modified ultrasonographysurrogate

Main Result

p-value: p=<.001

Insulin attenuates norepinephrine-induced venoconstriction in vivo through a mechanism that is likely cyclic guanylate monophosphate dependent.

Cite This Study

Grover et al. (1995) studied Healthy (n=16). Insulin vs. Norepinephrine alone was evaluated on Mean venous diameter (p=<.001). Insulin caused highly reproducible dose-dependent increases in mean venous diameter when combined with norepinephrine compared with norepinephrine alone (P<.001).

synapsesocial.com/papers/6a6d596ee36a167817dffd03https://doi.org/10.1161/01.hyp.25.4.779
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Intra-arterial infusion of insulin attenuates vasoreactivity in human forearm.1993 · 68 citations
  2. 2Insulin-mediated skeletal muscle vasodilation is nitric oxide dependent. A novel action of insulin to increase nitric oxide release.1994 · 1,224 citations
  3. 3Effects of insulin on pressor responsiveness and baroreflex function in diabetes mellitus.1986 · 10 citations
  4. 4Insulin-Stimulated Vascular Relaxation: Role of Ca2+-ATPase1992 · 71 citations
  5. 5Insulin Increases Guanosine-3′ ,5′-Cyclic Monophosphate in Human Platelets: A Mechanism Involved in the Insulin Anti-Aggregating Effect1994 · 56 citations