Arvd is a threat for the heart.

Mum am feeling hurt here -shared a children and apply hand to the left side of breast.And mum not believes his, and in children never hurts a heart. Yes, children's are having ache heart, because of adults  imitation, and this is a fact, that they are bad localizing aches feelings, and not rare finding,that hurt in stomach. And in children too heart hurts, and cardiovascular disease they are rare having, as sources of many heart diseases in adults are take begin in childhood age. And anatomic physiologic peculiarities of cardiovascular system for children does her a sensitive to a different external affects, and any infection disease is destroys heart function and vessels, and very often heart suffers of arvd, lungs inflammations, dysentery, and in diphtheria.
And of three membranes of the heart wall  are most sensitiveness to infection agents is myocard as heart muscle.Toxins are secreting by microbes,damage for heart tissues and between theirs are finding connective tissue layers.And under affecting toxins are protein substances , circulating in a blood are changing so,that organism beginning perceives theirs,like foreign, and foreign, is always try to reject, neutralize, and display as auto allergy reaction, which is ending of inflammation heart muscle is myocarditis. Myocarditis display is on depth or and in begin of infection disease,and his first signs display  in 4 weeks, when a children as recovering meaning. And in light myocard display temperature rising is not high, or just keeping a normal, and patient nothing on complaining, but mum checked,that he is paled, cried, capricious, playing as till tiredness faster, slowly walking on steps, with dyspnoe, and here needing checking for children in the hospital. And in myocarditis of a middle heaviness a symptoms of disease are very clear, as weakness, dyspnoe, less mobility, and heart beating, heart fading, and heart ache. And more clear they are display if myocarditis hard displayed.And result of disease depends from a level his heaviness and from a timely diagnosis putting and about a right cure done, and right regime checked. And light myocarditis forms ending in 4 weeks with a full recovering, but a destroys of rhythm heart keeping for the long time. And good result in myocarditis of the middle heaviness, but inflammation process getting as spreading character. As a part of muscles tissue dead, and on theirs place display a connective tissue,which is later hardening,turning in non elast non working scar tissue, and happens this same, that an everybody checked as after wound or inflammation on the skin leaving a full scar.
If these sclerozing niduses at myocard is less, they are not dangerous, and when they are having  on the big places  and till sclerosing for an all myocard, and heart function is hardening and displays are hard destroys of a blood circulations, and they are happening,when myocarditis hard displays, or repeatedly display, after infection disease.