The mother of 13-year-old YouTube star Caleb Logan Bratayley has revealed her son died from an undetected heart condition.
In a heartbreaking Instagram post, Caleb's mum Annie explains that her son had an undetected health condition called hypertrophic cardiomyopathy, before adding that she misses him everyday.
Hypertrophic cardiomyopathy is a genetic condition which is believed to affect one in 500 people in the UK.
It occurs when the muscular wall of the heart thickens, making the heart muscle stiff. This then makes it difficult for the heart to pump blood properly.
Common symptoms of hypertrophic cardiomyopathy include shortness of breath, chest pain, palpitations, light headedness and fainting.
According to NHS Choices, most people with the condition can live a "full, normal life".
However in some cases, particularly in children and young athletes, it can be very serious. In fact, it is the most common cause of sudden unexpected death in this age group.
There is no cure for the condition, however it can be managed with a variety of treatments and medicine, reads the British Heart Foundation website.
Options include medicine to help control blood pressure and abnormal heart rhythms, having a pacemaker fitted to control heart rate, or having an ICD - a small device which can treat people with dangerously abnormal heart rhythms.
The Bratayley family's YouTube channel, which has nearly two million subscribers, is well-known in America for its videos showcasing the children's daily adventures.
Annie Bratayley, their mother of the family, posted an Instagram photo of her son on November 10, with the caption: "The doctor confirmed today that Caleb passed away from a heart condition called hypertrophic cardiomyopathy that went undetected in his yearly checkups.
"Caleb didn't have any symptoms so the doctor said there was nothing we could have done differently."
She continues: "The sadness of losing someone you love is unimaginable. Thank you to everyone who has reached out, your kindness and support continues to help our family.
"We miss our baked potato everyday."
Tips For A Healthy Heart
Get Moving(01 of10)
Open Image ModalTen minutes of exercise a day can drastically reduce your risk of heart disease. Some basic, quick exercises include taking the stairs at work, jogging around the block or taking the dog for a brisk walk. (credit:Getty )
Fortify Your Diet(02 of10)
Open Image ModalWhat you eat makes a big difference for your heart. Try incorporating leafy greens, like spinach and chard, into your diet, substituting sugary snacks with fresh fruit and doubling up on veggies in recipes. (credit:AP)
Have Fun With Exercise(03 of10)
Open Image ModalExercise doesn't always have to be a drag! Some fun exercise options include jumping rope, biking, swimming or dancing. (credit:Getty )
Lower Your Risk For High Blood Pressure(04 of10)
Open Image ModalTo lower your risk of high blood pressure, eat fruits and vegetables at the beginning of your meal, try to maintain a weight in the “healthy” or “ideal” range and limit your alcohol intake. (credit:Getty )
Avoid Sitting (05 of10)
Open Image ModalSurprisingly, both smoking and sitting in a chair all day increase your risk of heart attack about the same amount. Get on your feet by walking around during television commercial breaks, standing up while you’re on the phone or getting off the bus one stop early. (credit:Getty)
Quit Smoking (06 of10)
Open Image ModalDoctors recommend these tips if you're trying to quit smoking:1. Focus on the reason you want to quit.2. Ask a doctor for help quitting.3. Get support from friends and family.4. Relax! Stress makes quitting harder. (credit:Getty )
Get A Better Night's Sleep (07 of10)
Open Image ModalTo work toward a better night’s sleep, try keeping a sleep diary to learn your patterns, and follow a strict sleep schedule, even during the weekend. (credit:Getty )
Adjust Your Sleep Schedule (08 of10)
Open Image ModalDoctors recommend turning off any digital screens at least one hour before bed. Then, do something relaxing like reading a book or listening to soothing music. (credit:Getty )
Whole Grains (09 of10)
Open Image ModalWhole grains can help reduce your risk of heart disease. Substitute whole grains into your diet with foods like whole-wheat bagels, wild rice and whole-wheat tortillas. (credit:Getty )
Eat More Fruits And Veggies (10 of10)
Open Image ModalSneak more fruits and veggies into your diet by having a fruit salad before dinner. Try fresh salsa with a few chips for a healthy snack or challenge yourself to try new fruits like jicama or papaya. (credit:Getty )