Left ventricular filling abnormalities in asymptomatic morbid obesity

Area of Science:

• Cardiology
• Obesity Medicine
• Echocardiography

Background:

• Obesity is a growing public health concern associated with cardiovascular complications.
• Diastolic dysfunction, a key indicator of cardiac health, can be affected by obesity.
• Early detection of subclinical cardiac changes in obese individuals is crucial.

Purpose of the Study:

• To investigate left ventricular (LV) diastolic filling patterns in asymptomatic morbidly obese patients.
• To compare diastolic function indices between obese individuals and lean controls.
• To assess the prevalence of diastolic abnormalities in the context of bariatric surgery candidacy.

Main Methods:

• Pulse Doppler echocardiography was used to measure LV diastolic filling parameters.
• Left ventricular mass was calculated from wall thickness and internal dimensions.
• Asymptomatic morbidly obese patients were compared with age- and sex-matched lean controls.

Main Results:

• Fifty percent of morbidly obese patients showed LV diastolic filling abnormalities.
• Obese patients had a significantly decreased ratio of early to late diastolic filling (1.16 vs 1.66).
• Peak early diastolic filling velocity was reduced, and atrial contribution was increased in obese patients.
• Obese patients exhibited significantly increased LV mass, irrespective of body surface area correction.

Conclusions:

• Asymptomatic morbidly obese patients frequently present with diastolic dysfunction.
• These findings suggest a potential subclinical cardiomyopathy in obese individuals.
• Diastolic abnormalities may precede overt symptoms, highlighting the need for cardiac assessment in obesity management.