For some insight into the configuration of conducting pathways that permit electical impulse to pass into the various parts of the ventrical to contract and pump blood into circulation. It is a conduction disturbance that primarily involves the early phases of activation (contraction).. The left anterior fascicle pathway crosses the left ventricular outflow tract (aorta valve, root) and can be damaged by high flow, high pressure, and turbulence as occurs with aortic valvular (valve opens to pass blood from left ventricle into circulation) disease, hypertension, and cardiomyopathies.... However, in the absence of apparent organic heart disease and not associated with block in the other fascicles is usually benign.
Abnormal T wave could indicate some vessel blockage and/or prior heart attack, and often doesn't mean anything serious and no problem.
An ECG is not a very good source for any heart condtions other than conductivity issues and heart rhythm assessment.
Your next step is for the doctor to do an echocardiogram and/or a stress test that will determine any ischemia (reduced blood flow) usually due to vessel occlusions. An echo can provide information regarding the heart's structure, heart wall movement (rule out any heart cell damage), and heart flow pattern through the heart.
I have provided the worst case scenario, your doctor will assess your condtion based on your symptoms, other tests, etc. Thanks for sharing and if you have any other questions or comments you are welcome to respond. Take care.