Hyperdynamic circulation

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. In effort to compensate the heart will increase cardiac output and heart rate, which accounts for the increased pulse pressure and sinus tachycardia.[1] The condition sometimes accompanies septic shock, preeclampsia, and other physiological and psychiatric conditions.[citation needed]

## Possible causes

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* Kidney disease
* Hypovolemia
* Adrenal crisis \- especially after fluid replacement[2]
* Anemia
* Anxiety
* Aortic Regurgitation[3]
* AV fistulae
* Beriberi
* Dysautonomia
* Erythroderma
* Exercise
* Liver failure
* Hydrocephalus[4]
* Hypercapnia
* Paget's disease
* Portal hypertension
* Pregnancy
* Pyrexia
* Thyrotoxicosis
* Vasodilator drugs

## References

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1. ^ Mosby's Medical Dictionary, 8th edition. S.v. "hyperdynamic circulation." Retrieved July 28, 2010 from http://medical-dictionary.thefreedictionary.com/hyperdynamic+circulation
2. ^ Bonachour et al. Hemodynamic changes in acute adrenal insufficiency. Intensive Care Medicine (1994) 20:138-141
3. ^ Sattar, Hussain A. Pathoma: Fundamentals of Pathology. Pathoma LLC (2011); p. 80.
4. ^ Greitz, Dan. Radiological Assessment of hydrocephalus: new theories and implications for therapy. Neurosurg Rev (2004) 27: 145-165.

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