Patient Characteristics
A total of 132 patients were initially considered for entry into the study. Four patients were excluded because no LV endocardial borders could be visualized with or without use of intravenous contrast. Thus, the final study population consisted of 128 subjects including 62 patients who did not receive intravenous contrast and 66 patients who received intravenous contrast prior to baseline image acquisition. Table I shows patient characteristics for the study population as a whole and for the groups receiving and not receiving intravenous contrast.