Is it possible that the implant is putting a strain on my heart or tugging on the muscle?

You might have a capsular pain, implant rupture, implant illness syndrome??? Best to see a boarded PS to examine the breasts. also a MRI scan indicated.

Thank you for sharing your question and I am sorry to hear of your breast pain.  After 17 years it is unlikely that the implants are causing your heart to beat harder.  If your left breast implant has hardened it can result in some pain due to the formation of a capsular contracture, which should be ruled out.  Hope this helps.

I can think of no reason why breast implant could cause a fast heartbeat. I would go back to your cardiologist and have an echo cardiogram and a 24 hour Holter monitor done looking for something like atrial fibrillation or flutter. Best of luck.