Dopamine agonists and valvular heart disease in patients with Parkinson's disease: evidence and mysterySince the first case report [28], further case reports [4,7,8,19,21,27,30], one observational report [2], case-control studies [12,17,18,[31][32][33][34], and one cohort study [26] conducted in PD patients have demonstrated similar findings of fibrotic VHD caused by ergot dopamine ag-JON 5012 ■ Abstract High doses of the ergot dopamine agonists, pergolide and cabergoline, frequently cause valvular regurgitation and, somewhat less frequently, valvular heart disease (VHD) in Parkinson's disease. Most patients with valvular regurgitation have no cardiac signs