What question did this study set out to answer?

This research aims to understand the mechanisms behind high plasma norepinephrine levels in congestive heart failure and their impact on prognosis.

June 1, 1988AJP Endocrinology and Metabolism

Abnormalities in systemic norepinephrine kinetics in human congestive heart failure

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Why the study?

Does norepinephrine clearance and spillover differ between patients with congestive heart failure and normal subjects?

Population

19 patients with congestive heart failure (CHF) and 18 normal subjects (total n=37)

Comparison

90-min steady-state intravenous infusion of… vs Normal subjects receiving the same infusion

Design

Cross-sectional

Follow-up

90 minutes

Authors

DDDwight DavisCedars-Sinai Medical Center RBR. G. BailyPenn State Milton S. Hershey Medical Center RZRobert ZelisHershey (United States)

Discussion

Member takes

Implication

Should not yet change sympathetic management in CHF; extends NE kinetic observations but remains hypothesis-generating.

Key Points

This research aims to understand the mechanisms behind high plasma norepinephrine levels in congestive heart failure and their impact on prognosis.
Studied norepinephrine kinetics during a 90-min intravenous infusion in 19 patients with CHF and 18 normal subjects.
Measured venous plasma norepinephrine levels and calculated clearance and spillover using specific equations.
Compared mean plasma norepinephrine levels and clearance rates between CHF patients and normal subjects.
Venous plasma norepinephrine levels were significantly higher in CHF patients (634 pg/ml) compared to normal subjects (247 pg/ml; P<0.001).
CHF patients exhibited decreased norepinephrine clearance (0.99 vs. 1.48 l.min-1.m-2; P<0.001) and increased spillover (3.60 vs. 2.08 nmol.min-1.m-2; P<0.001).
These abnormalities in norepinephrine kinetics suggest a link between high plasma norepinephrine and early mortality in CHF.

Structured PICO

Does norepinephrine clearance and spillover differ between patients with congestive heart failure and normal subjects?

Population

19 patients with congestive heart failure (CHF) and 18 normal subjects (total n=37)

Intervention

90-min steady-state intravenous infusion of tracer [3H]norepinephrine of high specific activity

Comparator

Normal subjects receiving the same infusion

Outcome

Norepinephrine clearance and spilloversurrogate

Both decreased clearance and increased spillover contribute nearly equally to the high plasma norepinephrine levels observed in congestive heart failure.

Cite This Study

Davis et al. (1988) studied this question.

synapsesocial.com/papers/6a6fd057f44fa9f079dd4f22 https://doi.org/10.1152/ajpendo.1988.254.6.e760

Topics

Heart failure HFrEF treatment

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Abnormalities in systemic norepinephrine kinetics in human congestive heart failure

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Abnormalities in systemic norepinephrine kinetics in human congestive heart failure

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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