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Circulating catecholamines in acute asthma.

P W Ind, R C Causon, M J Brown

British Medical Journal (Clinical Research Ed.)

|January 26, 1985

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Patients with severe asthma attacks show elevated noradrenaline levels, indicating stress. Surprisingly, adrenaline levels did not increase, suggesting potential impaired secretion in acute asthma cases.

Area of Science:

Pulmonary Medicine
Endocrinology
Critical Care

Background:

Acute severe asthma presents a significant physiological stress.
Catecholamine levels, including adrenaline and noradrenaline, are key indicators of the body's stress response.

Purpose of the Study:

To investigate plasma catecholamine concentrations in patients with acute severe asthma.
To explore the relationship between catecholamine levels and asthma severity or need for admission.

Main Methods:

Plasma samples were collected from 15 patients presenting with acute severe asthma.
Concentrations of noradrenaline and adrenaline were measured.
Patients were categorized based on admission status.

Main Results:

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All patients exhibited two to three times normal plasma noradrenaline concentrations.
Significantly higher noradrenaline levels were observed in patients requiring hospital admission.
Plasma adrenaline concentrations remained unchanged in all patients during acute asthma attacks.

Conclusions:

Elevated noradrenaline reflects sympathetic nervous system activation in acute severe asthma.
The failure of plasma adrenaline to increase is a notable finding, contrasting with other critical conditions.
This may indicate an impaired adrenaline secretion mechanism in asthma, rather than adrenal exhaustion.