The heart problem involves the left ventricle becomes stretched, thin and weaker, which affects how blood is able to pump around the body.
The star died from problems with his heart and also suffered a build-up of fat in his liver, a coroner has revealed.
The heart problem involves the left ventricle becoming stretched, thin and weaker, which affects how blood is able to pump around the body.
In some cases it is an inherited condition and people who have the inherited form have a 50% chance of passing it on to their children.
Otherwise, it is caused by things such as viral infections, uncontrolled high blood pressure and problems with the heart valves.
A lack of vitamins and minerals in the diet, heavy drinking and recreational drug use can also lead to the condition.
Due to the heart not pumping effectively, fluid can build up in the lungs, ankles, abdomen and other organs of the body – causing heart failure.
Most symptoms come on slowly but include shortness of breath, swelling of the ankles and stomach and excessive tiredness.
Myocarditis is inflammation in or around the heart and is usually caused by a viral, bacterial or fungal infection.
Symptoms include pain or tightness in the chest which can spread to other parts of the body.
Other symptoms are shortness of breath and tiredness.
Myocarditis is potentially fatal, although it sometimes exhibits no symptoms at all.
It is notoriously hard to detect and can lead to heart failure in severe cases.
People can sometimes have a high temperature, suffer headaches and have aching muscles and joints.