VWF multimer found in patients on LVAD. Examples of VWF multimer patterns found in normal plasma pooled from 32 healthy subjects and in patients on LVAD support who developed myocardial infarction (Patient A), no complication (Patient B), and severe GI bleeding (Patient C). Samples were collected before LVAD implant (BL), 3 months after implant (3), and at the time of readmission for the clinical complications (E).