What it MAY mean is the correct expression.
Q. 12S-interpretation.
>>>>12 lead EKG provides different angles of the heart's anatomy.
Q. Left axis deviation.
>>>>>12 lead EKG views different angles and each person has a unique mean vector direction. which remains constant unless the cardiac status changes. For example, left ventricular hypertrophy secondary to heart failure pulls the mean vector even more sharply to the left side as well as a heart rhythm problem.
Q. Left ventricular hypertrophy with repolarization abnormality.
>>>>The left ventricle (pumping chamber) is enlarged. Repolarization abnormality indicates there may be a heart rhythm problem...
Q. Cannot rule out Septal infarct, age undetermined.
>>>>The septum is the heart wall that separates the right and left heart chambers. An infarct is damage to the heart cells from a previous episode of a heart attack.
I have provided worst case scenarios and a general explanation of the possibilities based on the report, but a differential diagnoses requires more information to support or rule out.
"Accuracy of an EKG— The sensitivity and specificity of an EKG vary widely and not very reliable. Sensitivity of the various criteria for moderate to severe LVH is in the 30 to 60 percent range, with specificities in the 80 to 90 percent range". For a differential diagnosis would require further testing such as an echocardiogram, related symptoms if any, health history, etc. Your doctor would have the relevant information to support a dx and effectively treat if necessary..