Echocardiographic parameters of epicardial fat deposition and its relation to coronary artery disease.

Background: Epicardial fat has been associated to the presence of significant coronary artery disease (CAD). However, the association of lipomatous infiltration of the atrial septum and fat infiltration of the right ventricle remains uncertain. None of these parameters has been thoroughly studied in Hispanic patients. Objective: To determine the association between epicardial fat, lipomatous infiltration of the atrial septum and fat infiltration of the right ventricle with the presence of CAD. Methods: Two hundred and fifty Hispanic patients (86 women and 164 men, mean age 61.5 +/- 8 vs 62 +/- 10 years respectively), undergoing their first invasive coronary angiography (ICA) were studied. The day after the ICA, parameters of cardiac fat deposition were evaluated using bidimensional echocardiography. Clinical (age, sex, personal antecedents of smoking habit, hypertension and diabetes mellitus, as well as clinical presentation of CAD) and anthropometric (waist circumference and body mass index [BMI]) variables were also collected. Results: Epicardial fat (OR 1.27 p = 0.009), as well as fat infiltration of the right ventricle (OR 2.94 p = 0.027), had a significant and independent association with the presence, but not the extent (p = 0.516) and clinical presentation (p = 0.153) of CAD. The extent of epicardial fat deposition showed a proportional and significant association (p = 0.001) with the presence of CAD. Conclusion: Epicardial fat and fat infiltration of the right ventricle were both significant and independent factors associated to the presence of CAD, which was proportionally increased according to the extent of cardiac fat deposition. (Arq Bras Cardiol 2011; 97(2) : 122-129)