Troponin test
“Any continued elevation of troponin in the blood, however minimal, must be regarded with significant concern, even if there appears to be a complete clinical resolution of the myocarditis. Everyone should have this test done, even if they are feeling perfectly well, to both establish a baseline within the normal range or to detect any unsuspected low-grade myocardial inflammation.”
http://orthomolecular.org/resources/omns/v19n01.shtml
“It is important to realize that most of the tissues and organs of the body do not have reliable laboratory markers indicating the presence and degree of ongoing spike protein damage. Tracking heart damage with troponin levels makes this organ relatively unique in this regard”