Welcome to Connect, @fifi007. I’d like to introduce you to a few members for each of your concerns, but before I do that I’d also like to share some information, which I hope will alleviate your worry about the palpitations.

I’ve had palpitations or tachycardia, (Supraventricular tachycardia) ever since I can remember, and I know how debilitating these episodes can get! A few years ago, I had a cardiac ablation procedure, (which “resets” the heart’s electrical circuit), as my episodes were getting prolonged, occurred too often, and I couldn’t the fast heart rate with any of the vagal maneuvers. Most people experience an improvement after SVT ablation, but there’s a fair chance that palpitations may return – as they have in my case – and the procedure can be repeated. But, here I am, and so far so good for the both of us, I should say:)
However, I don’t have a right bundle branch block (RBBB), and you might want to ask your doctor about how that might affect the palpitations.

For Palpitations...Meet @ajmario @ktcrosswalk1 @jigglejaws94 @loli @cheris @martishka @texas7777 @mikeyp, who have discussed living with palpitations. You may also wish to view these discussions on Connect:
– Supra Ventricular Tachycardia (PSVT) and Running https://connect.mayoclinic.org/discussion/supra-ventricular-tachycardia-psvt-and-running/
– Feeling Skipped Beats, Palpitations: What could this possibly be? https://connect.mayoclinic.org/discussion/what-could-this-possibly-be/

For RBBB...Please meet @eileena @balubeje @markjones and @rogue_doctor as they have shared their or their loved ones experiences. Here's some information from Mayo Clinic on bundle branch blocks:
http://www.mayoclinic.org/diseases-conditions/bundle-branch-block/basics/definition/con-20027273
I’d sincerely encourage you to go through these conversations about Metoprolol, and feel free to join in and tag fellow members:
– Side Effects of Metoprolol? https://connect.mayoclinic.org/discussion/metoprolol/
– Weaning off Metoprolol https://connect.mayoclinic.org/discussion/weaning-off-metoprolol/

@fifi007, have you consulted with your doctor about stopping Metoprolol? How do you manage the palpitations?