Background and aim: The left atrium contributes significantly to the left ventricular filling as it functions as a reservoir, conduit, and pump. These functions are referred to as the phasic function of the left atrium and they are assessed using left atrial volumes. The left atrial function index on the other hand is a rhythmic independent composite index which is a better marker of left atrial function. The study therefore aimed at comparing left atrial function (using the left atrial function index) among hypertensive heart failure patients, patients with hypertension but not in heart failure, and normotensive patients.