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.
Hyperdynamic circulation is an abnormally elevated circulatory volume. Abnormal systemic vasodilation and a corresponding reduction in peripheral vascular resistance lead to decreased pulmonary capillary wedge pressure and blood pressure, often manifesting as a collapsing pulse but occasionally as a bounding pulse.