Good advice. I got an arrhythmia half way through Taxol (was also on Herceptin) but it was almost certainly the adriamycin that triggered it. Didn't have radiotherapy though. Regular checks through Herceptin and since (nearly five years) had not indicated any significant change. Age is another factor. I'm fine and apart from a few pills, it doesn't affect my life - I still work, travel, go to the gym etc. But I find it important to know about it, so I can easily recognise any changes and get the appropriate advice sooner rather than later!