Hyperdynamic circulation is abnormally increased circulatory volume. Systemic vasodilation and the associated decrease in peripheral vascular resistance results in decreased pulmonary capillary wedge pressure and decreased blood pressure, presenting usually with a collapsing pulse, but sometimes a bounding pulse.
Abnormally high circulatory volume characterizes hyperdynamic circulation. Systemic vasodilation and the resultant drop in peripheral vascular resistance result in reduced pulmonary capillary wedge pressure and blood pressure, typically presenting with a collapsing pulse but sometimes with a bounding pulse.