Two Northern Ireland musicians know exactly what lies ahead for Queen guitarist Brian May as he recovers from a recent heart attack.
The 72-year-old rocker has been upbeat on social media despite revealing a "near death" experience last month when he was fitted with three stents - tiny tubes that can open blocked arteries.
In a series of Instagram posts, the star urged people over the age of 60 to have an angiogram.
He wrote: "I keep fit on my bike, good diet, and not too much fat. We've all got to really look at ourselves as we get to the autumn years. What seems to be a healthy heart may not be."
And in a video he shared online, he said: "I thought I was a very healthy guy but I turned out to have three arteries that were congested and in danger of blocking the supply of blood to my heart."
On a positive note, he added: "I walked out with a heart that's very strong now, so I think I'm in good shape for some time to come."
Two local men who also considered themselves fit and healthy when they suffered a heart attack out of the blue are singer and Queen tribute artist Harry Hamilton, from Lurgan, and Brian Mercer, a school caretaker and drummer who lives in Maghaberry. Both men today share their experience - and the impact it had on their lives.
Harry Hamilton (55), who is best known for his hugely successful Freddie Mercury tribute act Flash Harry, also works as a project manager with the NI Food and Drink Association.
Harry, who lives with wife Heather (53) and daughters, Brooke (24), Lucy (22) and Tianna (18), says he had no doubt he was suffering a massive heart attack when he collapsed in his home on March 3 last year.
He had just finished a weights workout in his home gym when he experienced excruciating chest pain.
Just over a year later, Harry says he has recovered physically but that the emotional toll has been harder to deal with.
"For me the biggest part of recovery has been the mental side," he explains.
"It still stays with you and you are left with a sense of vulnerability.
"I also feel nervous about doing things.
"I wouldn't dream of going on a long flight as I would hate to have a heart attack on a plane.
"When I go for a walk away from home I am thinking about where I am and how long it would take for an ambulance to get to me."
That anxiety is understandable, not least because if all had gone to plan, Harry would have been on a plane when his heart attack happened. His band had been performing a series of gigs in Bulgaria and Harry had decided to fly home a day earlier than the others. He fell ill at home at the same time as the rest of the band was in mid-flight.
He had just finished a workout at home when he took pains in his chest. His wife Heather, who had just arrived back at their house, found him lying in agony on the kitchen floor.
He was rushed to the Royal Victoria Hospital in Belfast where he underwent emergency surgery to deal with a blood clot and had five stents inserted.
Looking back on the experience, he reflects: "It was such a shock for me. I have a mini gym in my garage and it is my place to go and escape and work out.
"I had just finished lifting some weights and I had walked about 10 feet to the kitchen and I knew immediately I was having a heart attack.
"I saw Heather pulling into the drive and as she came in the door I told her to ring 999. There was no question because the pain was so severe.
"It was panic stations.
"Surprisingly I wasn't scared but it kind of hit me when I was on the operating table and they had to use the defibrillator twice on me.
"I was unconscious the first time they used it but felt it the second time when they were trying to get my heart into a normal rhythm.
"I was later told I had heart disease and had a blood clot that was very dangerous."
In the two years leading up to his heart attack, Harry had been concerned about how fatigued he was feeling. He had been to see his GP because he had been feeling more tired than usual.
The fatigue, however, wasn't bad enough to impact on his ability to perform on stage and his doctor advised that if it got any worse he should come back.
"Things like washing the car or cutting the grass left me feeling really tired but I was just putting it down to my age.
"I would have felt tired going onto the stage but after two or three numbers it went away and I never felt weak or tired after a show.
"I have a fairly healthy lifestyle and I did work out at home, but I never really pushed myself too much.
"Heart disease is just one of those things.
"I was told mine isn't genetic and I couldn't blame it on my lifestyle either as I didn't smoke or drink much."
Due to damage caused by his heart attack, Harry's heart function is 55% and while physically he feels well, he still struggles with the emotional fall-out.
"I lived in blissful ignorance before my heart attack and now I have to try and stop my worries getting in the way of my life.
"For example, for the last few years we would have done gigs in the Mull of Kintyre which is very remote and I am not sure that I would go again if we were asked.
"After a heart attack, the amount of damage depends on how soon you are treated and that is always on my mind.
"I have also become fixated on my weight and my intake of saturated fat to the point that I have even become a bit nerdish about it.
"I have a real sweet tooth and Heather and I would have enjoyed sharing desserts but I don't do it anymore - only very rarely and in small portions.
"I used to love a couple of biscuits with a cup of tea and now I don't go near biscuits.
"For me it is all about things I can do to reduce the risk."
And Harry is also mindful of the impact his heart attack has had on wife Heather, who witnessed it, as well as their three daughters.
"It is something you don't go through on your own, it was such a traumatic experience for my family as well and they wouldn't want to see me back in hospital again."
Harry says he was sorry to hear about Brian May's heart attack and hopes it doesn't stop him from performing.
He adds: "It will not be so easy for him touring now and he is bound to feel more vulnerable given his age. I wish him a speedy recovery."
Brian Mercer (64) had one stent inserted after suffering a heart attack at work three years ago this month.
A fit and active man, when he started to feel unwell he at first refused to believe it could be his heart.
Brian, who is married to Rosemary, has four children, Stephen (36), Jennifer (34), Michael (32) and Sophie (19), and works in Parkview Special School in Lisburn.
He is also a drummer with the popular local cover band DNA (Do Not Resuscitate).
"We had made a friendship garden for the children in school and I was futtering about in it after the kids had gone home from school," he recalls.
"It was a lovely day and I started to feel a bit unwell and thought I had got too much sun.
"I went to the office to get a drink of water and then I got a feeling like I had pulled a muscle in my chest and I felt a bit numbish, although I was completely mobile."
Brian decided to go home but didn't feel well enough to drive. Luckily his wife was shopping nearby and was at the school in minutes.
She and the school principal both suspected Brian was having a heart attack and fortunately Lagan Valley Hospital was just a 10 minute drive away.
"By the time my wife got to the hospital the chest pain had got really bad and I had an excruciating toothache that ran from one end of my jaw to the other which I later discovered is a symptom of a heart attack.
"My daughter, who is training to be a nurse, was in the front seat and kept talking to me the whole way to hospital, reassuring me. She was brilliant."
On arrival at A&E it was obvious to staff that Brian was having a heart attack. He was admitted and assessed and later transferred to the Royal Victoria Hospital to have a stent inserted in his main heart artery.
"I was fit and healthy and don't drink or smoke. I was in denial as I didn't think it would happen to me. They told me it was a major heart attack linked to the narrowing of the main heart valve and they had to put in an extra long stent to widen the area where the narrowing had formed.
"At no stage did I think I was in mortal danger."
Initially it left Brian feeling physically weak but he was determined to get back on the road to fitness and started to walk short distances every day as soon as he got home from hospital.
He returned to work after three months and while his job does require a fair bit of physical exertion, he now can no longer do heavy lifting.
He continues to play with his band and says he has a love of life that hasn't been diminished by the experience.
However, since his heart attack he does keep a close eye on his heart health.
He says: "I bought myself a heart rate monitor and got a bit obsessed with it. My heart rate is usually around 110 bpm (beats per minute) but when I drum it goes up to 140 or 150.
"I enjoy the band so it won't stop me doing what I love. I look at it like a car breaking down on the side of the road and a mechanic comes and fixes it and it's good for another while.
"I feel fortunate I had a heart attack as opposed to heart failure. I have a zest for life which is no less than it was before."
And like fellow performer Harry, Queen fan Brian sends his very best wishes for a full recovery to Brian May and hopes that he'll be back on stage entertaining the masses very soon.
A stent is a tiny tube inserted into a blocked passageway, such as a blood vessel, to keep it open.
The procedure, known as a coronary angioplasty, is a treatment that helps improve the blood supply to your heart.
During the procedure, a special kind of balloon is gently inflated inside the coronary artery to remove the blockage.
A stent, which is a stainless steel mesh, is positioned within the artery to allow blood to flow normally again.
Stents are usually needed when plaque blocks a blood vessel.
Plaque is made of cholesterol and other substances that attach to the walls of a vessel.
When a coronary artery is blocked, stents are usually inserted as an emergency procedure. The stent helps keep the blood flowing and the artery from narrowing again.