Mechanisms of Urgently Presenting Acute Heart Failure

Area of Science:

• Cardiology
• Physiology

Background:

• The underlying mechanisms of urgently presenting acute heart failure (AHF) remain unclear.
• Understanding these mechanisms is crucial for timely and effective intervention.

Purpose of the Study:

• To investigate the association between serum catecholamine levels and the clinical presentation of acutely presenting AHF.
• To explore the role of catecholamine surge in the pathophysiology of AHF.

Main Methods:

• Serum catecholamine levels (noradrenaline, adrenaline, dopamine) were measured in 484 AHF patients upon admission.
• Patients were categorized into early (<3 hours), middle (3-24 hours), and late (≥24 hours) symptom onset to admission groups.
• Multivariate logistic regression analysis was used to identify independent predictors of early presentation.

Main Results:

• The early symptom onset group exhibited significantly higher systolic blood pressure, increased frequency of orthopnea, lower pH, and greater need for noninvasive ventilation.
• Elevated serum noradrenaline and adrenaline levels were significantly observed in the early symptom onset group compared to later onset groups.
• Early symptom onset was independently associated with high systolic blood pressure (>140 mmHg), midnight/early morning admission, and high serum catecholamine levels.

Conclusions:

• An endogenous catecholamine surge may precipitate urgently presenting AHF.
• This surge can lead to excessive blood pressure elevation, increased afterload, and subsequent pulmonary congestion.
• Prompt evaluation of catecholamine levels in AHF patients may offer insights into disease mechanisms and guide management.