All the atypical antipsychotics can cause metabolic changes, but it is less likely with second and third generation than first generation. Seroquel is first generation. I don't want to make guesses about what medication you should be on, that is between you and your prescriber, but there are other options. Are you using Seroquel for sleep, mood stabilization, or psychosis,or a combo of those things? The med options will depend on why you are getting the Seroquel.

If you are having cardiac symptoms you should see a doctor and get checked out. Have you had an ECG?