The Geordie has confirmed he will retire this summer.
Recalling the heart problem that afflicted him in September, Carrick said: "I had a problem during the Burton game during the second-half.
“I had a few tests after that and the same problem came back on the Sunday of that week in training.
"I had the procedure the following week. It took a little while to get over.
“There were some times there, two or three days, when I wondered whether I would carry on playing or not, is it worth it or not?
"But that quickly passed and I got back fit. I wanted to finish on my own terms, so I was determined to get back fit.
"I've been training hard and we'll see what happens for the rest of the season."