Hello
Thank you for your query at DoctorSpring.com
From the limited strip of ecg that you have provided there seems to be biphasic T waves. there seems to an interpolated PVC. It could be because of anxiety stress or any structural abnormality in heart.
I would recommend you to get a 2D echo and serum electrolyte test done.
Feel free to discuss further,
Dr Vivek Mahajan
DM Cardiology