It is very possible that you have certain heart problems.
Getting chest pains, like an uncomfortable pressure, fullness, squeezing or pain in the center of the chest, is known as angina pectoris.
It is a symptoms of heart disease, or more precisely it is a result from lack of blood supply to heart muscle.
This usually happens because one or more of the heart's arteries (coronary blood vessels that supply blood to the heart muscle) is narrowed or blocked.
In rare circumstances, other heart conditions can lead to chest pains, like heart valves diseases, enlarged heart muscle, or uncontrolled high blood pressure.
The same underlying condition (blocked or narrowed arteries) is responsible for your inability to walk too far.
Acctually, people with peripheral artery disease (blocked or narrowed) need frequent breaks to continue walking, just because of lack of blood supply to the leg muscles (manifested with leg pains).
About your results... mild to moderate systolic impairment, this means that the systolic function has decreased due to increased coronary atherosclerosis (blocked or narrowed blood vessels that supply the heart muscle with blood) or because of enlarged heart muscle (hypertrophic cardiomyopathy).
Enlarged heart muscle, as I said before can be manifested with chest pains and can result from long-standing uncontrolled blood pressure.
Nonspecific ST-T wave abnormalities are very common, may be seen in people with cardiomyopathy and other condition, but can be seen in healthy individuals, too.
Poor R-wave progression can be associated with a history of infarct, tachycardia, or enlarged heart.
It can result from faulty ECG recording technique, too.
Best wishes!
