Hello, I got the very bad heart palpitation yesterday while doing physical activity .. that lasted for 30 min.. whichade me nervous as well... This is 3 rd time happening and yesterday I visited hospital and they did immediate ECG and result was sinus tachycardia And bp was 128/90 and pulse 97. Though same situation happened 4 months ago and I had gone through ecg and echo..both were normal and doctr said this could be anxiety I have done lots of test after that Blood sugar 93 H1abc 4.9 Tsh 2.6 Not sure what is the reason for this