Is cardiac function impaired in premotor Parkinson's disease? A retrospective cohort study.

The objective of this study was to assess cardiovascular response during cardiac stress testing in neurologically asymptomatic individuals who developed motor features of Parkinson's disease several years after the cardiac stress testing. This was a retrospective cohort study of patients who underwent cardiac stress testing between January 2001 and December 2010. Patients were followed until May 2012 to select those who developed Parkinson's disease.