I was diagnosed with bilateral atrial enlargement and preserved left ventrical systolic function on my recent echocardiogram. what does all this mean?

Biatrial enlargement: is an increase in the size of both the upper two chambers of the heart--the right and left atria. The preserved left ventricular systolic function means the heart muscle itself is pumping normally. Atrial enlargement can be due to a problem with the heart valves, or chronic lung disease on the right, systemic hypertension on the left. It requires an expert cardiology evaluation to clarify.