Alterations in Cardiac Structure and Function Associated With Sub-Severe Aortic Stenosis Progression: The ARIC Study.

Area of Science:

• Cardiology
• Echocardiography
• Cardiovascular Disease

Background:

• American Heart Association and American College of Cardiology guidelines define 4 stages of aortic stenosis (AS).
• Limited data exist on cardiac alterations in early (sub-severe) stages of AS.

Purpose of the Study:

• To investigate cardiac structure and function in early AS stages.
• To assess the impact of AS progression on cardiac measures.
• To identify predictors of AS stage progression.

Main Methods:

• Utilized data from the Atherosclerosis Risk in Communities (ARIC) study.
• Classified participants by AS stages at two time points (V5 and V7) using echocardiography.
• Employed multivariable regression models to analyze associations between AS stage, progression, and cardiac parameters.

Main Results:

• Early AS stages (A and B) were associated with increased left ventricular wall thickness, mass, and filling pressures compared to Stage 0.
• AS stage progression was linked to worsening of these cardiac measures (P<0.02).
• The presence of both left ventricular and left atrial abnormalities increased the likelihood of AS stage progression (OR 1.7, P=0.009).

Conclusions:

• Early AS stages are associated with cardiac remodeling and diastolic dysfunction.
• AS stage progression leads to deterioration of cardiac structure and function.
• Co-existing left ventricular and left atrial abnormalities predict a higher risk of early AS progression.