Hi There
Palpitations at younger age occurs due to few different reasons:
1.
Stress and
anxiety is on of the most important reason in this age group
2.
Smoking or consumption of great amount of caffeine containing drinks.
3. Structurally abnormal heart which is not a case with you as your
ECHOCARDIOGRAPHY is normal.
4. Presence of an abnormal electrical pathway in heart.
Now how to get rid of palpitations:
1. Try to avoid stress and anxiety, practice
meditation / yoga it helps a lot to stay calm.
2. Avoid smoking (if you do ) and caffeine drinks like coffee
3. Medicines
4. If nothing help then ELECTROPHYSIOLOGICAL STUDY AND RADIO FREQUENCY ABLATION.
As you said BETA BLOCKERS are not helping you I would like to try CALCIUM CHANNEL BLOCKERS like Calaptin with you. And if that also doesn't work and palpitations become more frequent and troublesome then go for EPS AND RFA. So consult your cardiologist personally to discuss your options and get a written prescription.
I wish you good health