FABP4 and sleep apnea syndrome: FABP4 was higher in morbidly obese with diastolic dysfunction compared to morbidly obese without diastolic dysfunction [16], FABP4 was associated with diastolic dysfunction in a small population-based cohort [17], and FABP4 was associated with left ventricular mass and function in patients with sleep apnea [18], in obese women [19], and in patients with coronary artery disease [20].