Alison Hammond has shared a video from her hospital bed after being rushed off air live on This Morning on Friday, where she was seen clutching her chest.
The presenter, 51, said her heart is being checked out after she suffered palpitations Dermot O'Leary were talking to TV vet Dr Scott Miller.
After being taken to hospital in an ambulance, Alison said: 'Hello my lovelies, I know you're all worried about me. Honestly I am fine first of all.
'I'm getting my old ticker checked out. I've been having a little palpitation and now I'm getting it all checked out, I think I'm OK, I'm hoping it's just a little panic attack or something like that.
'I love you all, thank you for the messages, I'm so sorry I left you.
'I wouldn't usually do that, I would never leave a TV show but I wasn't very well, so you know I am going to be all right and the doctors are so lovely and checking me out.'
She continued: 'Hopefully everything is fine, everything is fine actually. Look at me I'm rocking this gown and still got my makeup on from This Morning. Lush and love you babs.'
During the show, Alison had been seen on the edge of frame suddenly clutching her chest before she was rushed away from the sofa by Dermot.
Dr Scott looked worried as he attempted to carry on the segment while a loud retch was heard in the background.
Alison Hammond, 51, shared a video from her hospital bed and said her heart was being checked out after she was rushed off air live on This Morning on Friday
Alison had suddenly clutched her chest before she was hurried away from the sofa by Dermot about an hour into the episode
Alison had looked a little unwell just before she was taken ill
She joked that she would 'do anything to have a day off'
Ambulances were seen outside the ITV studios – a source told Daily Mail that Alison was able to walk into the vehicle
The show then cut to an ad break before returning with Dermot standing solo on set as he told viewers: 'Welcome back to This Morning, Ali is feeling just a little unwell so she's just had to duck out. Hopefully she'll be back in a sec.'
He later told viewers that his co-star would not be returning, saying: 'Ali's feeling a little unwell so I'll be here for the rest of the show.'
A source told the Daily Mail at the time: 'She's gone to hospital but we think she's OK. She walked into the ambulance after leaving the studio.'
Viewers voiced their concern for the star online, with one writing on X: 'What on earth has happened with Alison? Hope she's OK.'
Another asked: 'What just happened to Alison Hammond? Frightening.'
ITV has been contacted by the Daily Mail for comment.
Alison recently spoke about finding love with her Russian model lover, David Putman, in an interview with You magazine, read more here.
Aside from her romantic life, she's had a busy schedule in recent weeks, juggling This Morning with promoting the return of her Channel 4 show Great British Bake Off.
The star has been open about her healthy lifestyle, regularly sharing videos of her exercise regime and her diet changes.
The show then cut to an ad break before returning with Dermot standing solo on set as he told viewers that his co-host had to 'duck out'
Dermot was seen helping Alison off the set as a Dr Scott looked on
Before cutting to an ad break, Dr Scott was seen sitting on his own on set while a retching sound could be heard over the mics
Alison began her transformation five years ago when she started working with a personal trainer to regain her fitness and began a stricter diet.
Since then, the TV personality has also taken up Reformer Pilates and boxing, sharing videos of herself exercising online.
Speaking to the Radio Times about her improved regime, she said: 'I've had a personal trainer for five years, even when I was at my biggest. But I had a childish mentality with regards to food, especially toffees – but now I'll only have a couple a day.
'We're not getting any younger, are we babes? You realise at some point you've got to look after yourself. I've got a speaker under my pillow to play relaxing music, and a sleep tracker.'
Alison's health kick started after she discovered she was pre-diabetic, the point where your blood sugar is higher than normal but not high enough to be diabetic.
Previously speaking to Women's Health, she said: 'My mum had Type 2 diabetes and she was worried for me, so when I then found out that I was pre-diabetic, that was frightening. I thought, "I have to be an adult about this". The sweets had to stop, and the fatty foods.'
As she works to maintain her figure after making lifestyle changes, Alison gave an insight into the measures she has taken including taking up Reformer Pilates because she is as 'stiff as a board'.
She added: 'You feel absolutely incredible after it. I really need a good stretch – so Reformer Pilates has been brilliant for me.
'I also do this early-morning circuit class from the brilliant Steve Hensel at Blue Zone. I'll go at 6.30am and do a full hour, it's a proper old-school gym.'
Alison said that she leaves the gym feeling 'amazing' after working hard, but while she is keen to try things, there is one wellness practice she won't adopt.
She told Closer Magazine: 'I did try one of those cold plunge pools once – and absolutely not! It lasted about a minute. I was like, "Why am I literally trying to kill myself?"'
'We're kissing a lot. I'm getting a lot of massages': ALISON HAMMOND, 51, opens up on her 6ft 10, 29-year-old lover, why she won't be marrying him... and truth about tension between Paul Hollywood and Nigella Lawson