<human>: Hi Yesterday I went to the doctor cause I was short of breath and light headed with any work that I did like hanging up washing etc I felt like I was going to pass out. Anyways the doc gave me an ecg but everything seemed fine till i had to walk on the treadmil apparently what concerned him was a downward spike on the egc. What does that mean?
<bot>: Hello! Welcome on Chat Doctor ! I would like to review your ECG, if you can upload it on this site. Considering your symptoms and the ECG changes, I would recommend performing some other tests: - a coronary Anglo CT scan or nuclear perfusion cardiac stress test to investigate for coronary artery disease- a Doppler ultrasound of the carotid arteries, considering the episodes of lightheadedness. I would also recommend monitoring your blood pressure, because blood pressure fluctuations can trigger this clinical situation. Hope you will find this answer helpful! Kind regards, 