The Captopril Challenge Test Predicts Cardiac Structure and Dysfunction in Primary Aldosteronism

Area of Science:

• Cardiology
• Endocrinology
• Medical Diagnostics

Background:

• The captopril challenge test (CCT) assesses aldosterone production in primary aldosteronism (PA).
• It helps determine the magnitude of renin- and angiotensin II-independent aldosterone production.
• This aids in identifying the presence and severity of PA.

Purpose of the Study:

• To investigate the association between post-CCT plasma aldosterone concentration (PAC) and cardiovascular remodeling.
• To examine the link between post-CCT PAC and diastolic dysfunction.
• To evaluate the prognostic and therapeutic implications of post-CCT PAC in PA patients.

Main Methods:

• Retrospective analysis of 540 PA patients with complete CCT and echocardiographic data.
• Assessment of clinical and echocardiographic parameters at baseline and 1 year post-treatment.
• Statistical analyses including restricted cubic spline and linear regression.

Main Results:

• Post-CCT PAC showed a significant linear association with left ventricular mass index (LVMI) and E/e', indicating a continuum of risk.
• Post-CCT PAC was associated with baseline LVMI, E/e', and left atrial volume index (LAVI).
• Higher post-CCT PAC correlated with greater improvements in LVMI, E/e', and LAVI after treatment, unlike baseline aldosterone levels.

Conclusions:

• Higher post-CCT PAC is linked to more severe left ventricular remodeling and diastolic dysfunction.
• Post-CCT PAC predicts the severity of cardiac disease in PA patients.
• Elevated post-CCT PAC also indicates greater potential for cardiac structure and function improvement after PA-targeted treatment.