What is the clinical evidence from this study?

Study design: RCT. Population: acute myocardial infarction (n=36). Intervention: ACE inhibition (captopril or enalapril) vs. placebo. Primary outcome: neurohormonal response (renin-angiotensin-aldosterone, sympathetic nervous systems, BNP, and ANP).

What question did this study set out to answer?

This research aims to understand neurohormonal responses to ACE inhibition following acute myocardial infarction.

June 1, 1995European Heart Journal

Neurohormonal changes after acute myocardial infarction

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Key result

ACE inhibition reduced plasma angiotensin II levels but did not significantly modify ANP, BNP, or sympathetic nervous system responses after acute myocardial infarction.

Why the study?

Does ACE inhibition alter the neurohormonal response in patients with acute myocardial infarction?

Key Points

This research aims to understand neurohormonal responses to ACE inhibition following acute myocardial infarction.
36 patients presenting within 6 hours of chest pain were randomly assigned to receive captopril, enalapril, or placebo for 12 months.
The study was double-blind and focused on measuring various neurohormonal markers.
Assessments included plasma levels of brain natriuretic peptide and atrial natriuretic peptide.
Enalapril significantly reduced plasma ACE activity and angiotensin II levels compared to placebo.
Brain natriuretic peptide and atrial natriuretic peptide levels showed significant correlation with left ventricular ejection fraction at 5 days and 3 months post-infarction.
ACE inhibition did not significantly alter circulating norepinephrine or natriuretic peptide levels.

Study Design

Type

RCT (n=36)

Blinding

Double-blind

Randomization

randomized

Multicenter

Structured PICO

Does ACE inhibition alter the neurohormonal response in patients with acute myocardial infarction?

Population

36 patients presenting within 6 hours of chest pain onset due to acute myocardial infarction, randomized to ACE inhibitors or placebo for 12 months.

Intervention

Captopril (n=13) or enalapril (n=12) for 12 months

Comparator

Placebo (n=11) for 12 months

Outcome

Neurohormonal response (circulating levels of norepinephrine, brain natriuretic peptide, atrial natriuretic peptide, plasma ACE activity, and plasma angiotensin II levels)surrogate

ACE inhibition after acute myocardial infarction reduces angiotensin II levels but does not significantly alter the sympathetic or natriuretic peptide responses.

Discussion

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Implication

ACE inhibitor benefits post-MI appear independent of natriuretic peptide or sympathetic changes; challenges broader neurohormonal mechanism assumptions.

Cite This Study

Foy et al. (1995) conducted an RCT in acute myocardial infarction (n=36). ACE inhibition (captopril or enalapril) vs. placebo was evaluated on neurohormonal response (renin-angiotensin-aldosterone, sympathetic nervous systems, BNP, and ANP). ACE inhibition reduced plasma angiotensin II levels but did not significantly modify ANP, BNP, or sympathetic nervous system responses after acute myocardial infarction.

synapsesocial.com/papers/6a4af1374e2f04c47c8145d0 https://doi.org/10.1093/oxfordjournals.eurheartj.a060995

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Implication

ACE inhibitor benefits post-MI appear independent of natriuretic peptide or sympathetic changes; challenges broader neurohormonal mechanism assumptions.

Neurohormonal changes after acute myocardial infarction

Key Points

Study Design

Structured PICO

Discussion

Implication

Cite This Study

Neurohormonal changes after acute myocardial infarction

Key Points

Study Design

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider