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Reflex cardiovascular control in congestive heart failure.

G Mancia¹, G Seravalle, C Giannattasio

¹Cattedra Medicina Interna, Ospedale S. Gerardo, Monza, Italy.

The American Journal of Cardiology

|June 4, 1992

Summary

Cardiovascular reflex control is impaired in congestive heart failure (CHF), affecting both vagal and sympathetic modulation. Treatments like digoxin can improve this reflex function, potentially impacting patient prognosis.

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Area of Science:

Cardiovascular physiology
Autonomic nervous system function
Heart failure pathophysiology

Background:

Congestive heart failure (CHF) is associated with significant autonomic dysfunction.
Negative feedback mechanisms normally regulate cardiovascular function.
Impairment of these reflexes contributes to the pathophysiology of CHF.

Purpose of the Study:

To review evidence on the impairment of cardiovascular reflex control in CHF.
To examine the role of baroreceptors and cardiopulmonary receptors in this impairment.
To discuss the impact of pharmacological treatments on reflex function in CHF.

Main Methods:

Review of existing scientific literature and evidence.
Analysis of studies investigating baroreceptor and cardiopulmonary receptor function in CHF patients.

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Examination of the effects of CHF severity on reflex impairment.

Main Results:

Cardiovascular reflex control, including vagal and sympathetic modulation, is impaired in CHF.
This impairment affects arterial baroreceptor control of blood pressure and vascular resistance.
The degree of impairment correlates with CHF severity, being most pronounced in severe cases.

Conclusions:

Reflex impairment in CHF is primarily due to reduced receptor signaling, with other factors potentially involved.
Pharmacological treatments, such as digoxin, can improve impaired reflex function in CHF.
Improved reflex function may lead to reduced sympathetic activity and increased vagal activity, potentially influencing patient prognosis.