Myocardial infarct imaging with technetium-labeled complexes.

Detection of acute myocardial infarction as an area of increased activity has intrigued investigators for some time. Initial attempts with 203Hg-chlormerodrin and 203Hg-fluorescein analogues were successful in man. More recently, however, successful imaging of the acute myocardial infarct has been achieved with several 99mTc complexes. A large group of radiotracers localize in acutely damaged tissue in various models of experimental infarction. From these data, a number of specific structural properties associated with infarct avidity have been identified; these include the presence of mercury and the structural configuration of the organic carrier.