Perfusion Defect

Recently I did nuclear stress test. The findings of the test is " Stress images reveal a mild to moderate perfusion defect in the basoseptal wall of the left ventricle. Resting images reveal this defect to be fixed, The left ventricular ejection fraction = 64% (Normal > or = 50%). There is normal wall motion."
I do not understand the findings. Please explain the findings to a dummy.

[kenkeith]

Stress test indicates some blockage in the location shown.  LV ejection fraction (EF) is the fraction of blood pumped into circulation with each heartbeat.  Normal is 50 to 70%.  The significance of the blockage may be of no importance if there isn't any symptoms such as chest pain, etc.