Preclinical left ventricular diastolic dysfunction in metabolic syndrome

Area of Science:

• Cardiology
• Metabolic Disorders
• Cardiovascular Imaging

Background:

• Metabolic syndrome (MS) is frequently linked to left ventricular (LV) diastolic dysfunction and hypertrophy.
• Preclinical diastolic dysfunction may occur in MS independent of LV hypertrophy.

Purpose of the Study:

• To investigate if preclinical LV diastolic dysfunction occurs independently of LV hypertrophy in individuals with MS.
• To identify specific echocardiographic markers of diastolic dysfunction in MS.

Main Methods:

• Echocardiography with tissue Doppler imaging was performed on 90 participants with MS and 26 controls.
• Statistical analyses adjusted for age, gender, blood pressure, medication use, and body mass index.

Main Results:

• Metabolic syndrome was associated with increased left atrial diameter, LV mass, and reduced E/A ratio and mean e'.
• These associations persisted after adjusting for cardiovascular risk factors.
• LV diastolic dysfunction markers (LA diameter, E/A ratio, mean e') were independently associated with MS, even after accounting for LV mass.
• Diastolic dysfunction differences were more pronounced in younger individuals with MS.

Conclusions:

• Metabolic syndrome is associated with preclinical LV diastolic dysfunction independent of LV mass.
• MS may induce diastolic dysfunction via mechanisms separate from hypertrophy.
• Early intervention in MS is crucial, particularly in younger populations, to prevent cardiac dysfunction.