Heart failure following creation of an arteriovenous fistula for hemodialysis.

Careful analysis of the Doppler profile, performance of maneuvers during image acquisition, and comparison of data with prior studies are basic tools that allow us to provide useful clinical information and improved diagnostic accuracy. Here, we discuss a patient in whom a thorough evaluation of the Doppler pattern at rest and during maneuvers and the identification of temporal changes in cardiac hemodynamics helped establish a diagnosis.