Is your tropinine higher with heart failure or myocarditis? so when your tropinine is normal does this almost exclude one of those?

A normal troponin: doesn't necessarily mean that you don't have heart failure or myocarditis. Often with heart failure, unless a heart attack or significant stress to an impaired heart is involved, troponins are normal. Additionally only around 50% of biopsy proven myocarditis have elevated troponins, so you can have both conditions and normal troponins.

Myocarditis: Troponin is usually not elevated in heart failure. In myocarditis troponin is only elevated in some patients. In two studies of biopsy proven myocarditis troponin was elevated in 34% of patients and in 53% in the other study. It also depends on when the test is done. It is most likely to be high during the first month of illness, suggesting that is the time that most myocardial damage is done.

No: Is a marker for heart damage due to a heart attack.