Study population and clinical evaluation
We designed a cross-sectional study in which we included subjects with stable angina who visited the Nuclear Cardiology Department (NCD) between January of 2018 and June 2019. We performed complete clinical histories in which we asked for self-reported histories of arterial hypertension, dyslipidemia, smoking, obesity, type 2 diabetes (T2D) and previous myocardial infarction. Body weight quantification was performed to the nearest 0.1 kg using a calibrated stadiometer with the subject in light-weight clothes. Height was measured to the nearest 0.1 cm using a stadiometer with 1 mm gradations. Body mass index (BMI) was calculated as weight in kilograms divided by the squared product of height in meters. Obesity was defined as BMI >30 kg/m2. Body surface area (BSA) was estimated using the square root of the product of weight in kilograms multiplied by height in centimeters and divided by 3,600. All anthropometric evaluations were performed after an 8-hr fast.
Patients signed consent forms before all echocardiographic evaluations.