Thank you for sharing your concern.
I would need more information in order to help you.
For example, if the symptoms were positional and the frequency of the same, family history of cardiac disease, etc.
And the ECG does seem abnormal, and a clearer image would be helpful to proceed further.
Next Steps
For now you could do this:
1. Avoid lying in one position for too long.
2. Manage stress or anxiety with relaxation, breathing, or counseling if episodes recur.
3. Get up slowly from lying or sitting positions.
Health Tips
Echocardiography, Holter monitoring and tilt-table testing will prove helpful.