My brother has inflammation of the heart. Is that something important?

Need specifics. That's a very general description with commensurately wide implications. This could be myocarditis (muscle), pericarditis (heart sac), endocarditis (heart valves or tissue), and due to infections (viral or bacterial or more unusual organisms) or rheumatologic conditions or due to adverse medication effects. The point is that the exact diagnosis and cause are important to sort out importance.

Related Questions

Is carditis infection or inflammation of the heart?

Can be both. Carditis can be due to infections with bacteria, viruses, fungi and non-infectious causes such as auto-immune disease, e.g. Rheumatic fever, lupus, post mi/cardiotomy syndrome, and radiation injury etc. Read more...

Explain the condition called inflammation of the heart (carditis).?

Myo and pericarditis. Inflammation can be of the heart muscle (myocarditis) or of the lining of the heart (pericarditis). Myocarditis is often viral and sometimes can lead to heart failure; symptoms can be chest pain, shortness of breath, palpitations and generalized malaise. Pericarditis has many causes and may lead to fluid accumulation around the heart. Main symptom is chest pain, especially when lying down. Read more...
There are 2 types. Pericarditis which is inflamtion of the sac of the heart or the outer membrane mostly due to virus and myocarditis which is inflamtion of the heart muscle and is much more serious and could lead to heart failure. Read more...