Your echo results are NORMAL. You had no ischemia with good functional capacity. This is all excellent news. You also had normal systolic (pumping) and diastolic (relaxing) function.
There are many things that can affect your left atrial volume. These include (but not an exhaustive list) hypertension, atrial fibrillation, mitral valve regurgitation, mitral valve stenosis, diastolic dysfunction, systolic dysfunction to name a few.
E/e' normal values are <8. This is true for rest and stress.