W/o a complete patient history it's difficult to ascertain what exactly is going on. However, AMIs and angina pectoris are relatively limited to the geriatric/bariatric crowd and aren't responsible for all cases of chest pain. Chronic high BP could cause stenosis which might explain her acute chest pain and paresthesia. Excessively high levels of epinephrine from SNS stimulation due to panic attacks or undue stress could result in the development of arrhythmias and paresthesias that could come and go somewhat spontaneously, which could explain why initial ECG was clear...