Can you tell me what reversible ischemia in the basal and mid inferior walls of the heart means please?

"Significant" block. Infer you have had an imaging study, using exercise or a pharmacologic agent to induce or provoke ischemia, and then using an imaging agent like a radioactive tracer, to show blood flow distribution. Subtracting a resting image from the "stress" image shows what areas have inadequate blood flow. Since the blood comes from the coronary arteries, a reversible image implies partial, not total, block.