Please note: A lot of things cause tingling in the face + extremities ("neuropathy") as well as lightheadedness, but in this question, I'm only interested in potential heart conditions, or anything cardiovascular in etiology.
Is it possible for someone to have an underlying heart/vascular condition that is causing neuropathy and lightheadedness, but to also have a perfectly "clean" ECG? If so, what condition(s) exist and why do they fly under the "ECG radar"?
I googled this extensively and either nothing came back, or the results mentioned that ECGs would be successful in detection.