Does levodopa improve spatial contrast sensitivity in Parkinson 's disease?
Levodopa improves low-frequency contrast sensitivity in parkinsonian patients. Initially deficient contrast sensitivity in such patients may be restored to near normal levels by levodopa therapy.
Avoidance of surgery near the sinus node has no discernible effect on the development of early sinus node dysfunction. Thus, concerns about early sinus node dysfunction should not override patient anatomy or surgeon preference as determinants of which cavopulmonary anastomosis to perform.