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Implantation of Total Artificial Heart in Congenital Heart Disease
Published on: July 18, 2014
[Heart failure. Neurohormonal treatment]
1Hospitalización, Instituto Nacional de Cardiología "Ignacio Chávez", INCICH, Juan Badiano Núm. 1, Col. Sección XVI, Tlalpan 14080, México, DF.
Insights
Neurohormonal overactivity contributes to heart failure (HF). Angiotensin-II blockage is a primary treatment, while natriuretic peptides offer potential for decompensated HF patients.
Area of Science:
- Cardiology
- Endocrinology
- Physiology
Context:
- Heart failure (HF) pathogenesis involves hemodynamic and neurohormonal factors.
- Neurohormonal hypothesis implicates overactive endogenous endocrine systems.
- Renin-angiotensin-aldosterone and autonomic systems are key neurohormonal pathways in HF.
Purpose:
- To review the neurohormonal hypothesis of heart failure.
- To discuss the therapeutic implications of targeting neurohormonal systems.
- To highlight the role of natriuretic peptides in HF management.
Summary:
- Angiotensin-II blockade is a leading therapy for HF, reducing cardiac remodeling and improving endothelial function.
- Beta-adrenergic blockers precede Angiotensin-II blockade in HF treatment protocols.
- Atrial myocardium releases natriuretic peptides (e.g., Peptide B) upon stretching, showing utility in decompensated HF.
Impact:
- Understanding neurohormonal mechanisms refines HF treatment strategies.
- Targeting specific pathways like Angiotensin-II offers significant clinical benefits.
- Discovery of natriuretic peptides opens avenues for specialized HF therapies.
Abstract:
Two hypothesis on the cause of heart failure (HF) have been postulated, one of hemodynamic character and another one of neurohormonal nature. According to the second one, HF is consequence of the overactivity of endogenous endocrine systems such as the renin-angiotensin aldosterone or the autonomic system. Angiotensin-II blockage is actually the first option in the medical treatment of HF. Since it reduces cardiac and vascular remodelation, synthesis of collagen and improves the endothelial function. Preceding to this option one can find the use of beta adrenergic blochers. Recently it was discovered that atrial myocardium liberates, in response to stretching, several peptides with natriuretic properties, specially one denominated B. Such compound has utility in the treatment of decompensated heart failure exclusively in hospitalized patients.
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