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] Hyperdynamic circulation is a hallmark of distributive shock (such as sepsis) and physiological states like normal pregnancy.[2][3] It is also a defining feature of high-output cardiac states, which include severe anemia, hyperthyroidism, liver cirrhosis, and large arteriovenous malformations.[4]
Possible causes
[edit]- Kidney disease
- Hypovolemia
- Adrenal crisis - especially after fluid replacement[5]
- Anemia
- Anxiety
- Aortic Regurgitation[6]
- AV fistulae
- Beriberi
- Dysautonomia
- Erythroderma
- Exercise
- Liver failure
- Hydrocephalus[7]
- Hypercapnia
- Paget's disease
- Portal hypertension
- Pregnancy
- Pyrexia
- Thyrotoxicosis
- Vasodilator drugs
References
[edit]- ↑ Mosby's Medical Dictionary, 8th edition. S.v. "hyperdynamic circulation." Retrieved July 28, 2010 from http://medical-dictionary.thefreedictionary.com/hyperdynamic+circulation
- ↑ Cecconi M, Evans L, Levy M, Rhodes A. Sepsis and septic shock. Lancet. 2018 Jul 7;392(10141):75-87. doi: 10.1016/S0140-6736(18)30696-9. PMID: 29937192.
- ↑ Valensise H, et al. Maternal Hemodynamics from Preconception to Delivery... J Clin Med. 2024. PMID: 38350640.
- ↑ Sonaglioni A, et al. Heart Failure with Supranormal Ejection Fraction... J Clin Med. 2025. PMID: 42513274.
- ↑ Bonachour et al. Hemodynamic changes in acute adrenal insufficiency. Intensive Care Medicine (1994) 20:138-141
- ↑ Sattar, Hussain A. Pathoma: Fundamentals of Pathology. Pathoma LLC (2011); p. 80.
- ↑ Greitz, Dan. Radiological Assessment of hydrocephalus: new theories and implications for therapy. Neurosurg Rev (2004) 27: 145-165.
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