"To be honest, I just went through the motions for the last few months past year", McIlroy said.
With there being some concerns regarding McIlroy's health in the aftermath of his interview, McIlroy took to Instagram to alleviate those concerns while also expressing excitement for the start of his 2018 season.
"I've got a bit of an irregularity with my heart that I have to keep on top of", the 28-year-old told The Telegraph. He says he'll get an electrocardiogram every six months and an MRI once per year.
The Irish golfer traced the condition back to a bad viral infection he had 18 months ago in China, leading to some scar tissue and the thickening of his left ventricle.
"For now, I just need to stay on top of it and have to stay fit".
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"The rib's fine, no problems whatsoever", he told the Daily Telegraph.
McIlroy will tee-up next Thursday in the UAE capital without a victory in 2017 and not having tasted success since capturing the PGA Tour's season-ending 2016 Tour Championship and the week prior the Hazeltine Ryder Cup.
The four-time major victor was first made aware of an irregularity with his heart after suffering a viral infection in China in 2016. "I need to get back on that track and this year my goals are to add to my major tally and get back to World No. 1, winning more times than anyone else".
"I got injured at the Players and should have said, 'yeah, I'll miss a major, ' because I was only there to get by and you can't win a major by 'getting by'".
After failing to make it to the Tour Championship, McIlroy played twice more in Europe before shutting it down in early October to regroup.