Cardiovascular physiology


Cardiovascular physiology

Cardiovascular physiology is the study of the circulatory system. More specifically, it addresses the physiology of the heart ("cardio") and blood vessels ("vascular").

These subjects are sometimes addressed separately, under the names cardiac physiology and circulatory physiology. [ [http://www.lib.mcg.edu/edu/eshuphysio/program/section3/3outline.htm Overview] at Medical College of Georgia]

Although the different aspects of cardiovascular physiology are closely interrelated, the subject is still usually divided into several subtopics.

Heart

:"See Heart#Physiology for more details"
* Cardiac output (= heart rate * stroke volume. Can also be calculated with Fick principle.)
** Stroke volume (= end-diastolic volume - end-systolic volume)
** Ejection fraction (= stroke volume / end-diastolic volume)
** ((Cardiac Output)) is mathematically ` to ((Systole))

** Inotropic, chronotropic, and dromotropic states

** Cardiac input (= heart rate * suction volume Can be calculated by inverting terms in Fick principle
** Suction volume (= end-systolic volume + end-diastolic volume)
** Injection Fraction (=suction volume / end-systolic volume)
** Cardiac Input is mathematically ` to (Diastole))

* Electrical conduction system of the heart
** Electrocardiogram
** Cardiac maker
** Cardiac action potential

* Frank-Starling law of the heart
* Wiggers diagram
* Pressure volume diagram

Blood vessels

:"See Blood vessel#Physiology for more details"
* Compliance
* Microcirculation
* Starling equation
* Fick's law of diffusion
* Poiseuille's law
* Skeletal-muscle pump

Regulation of blood pressure

* Baroreceptor
* Baroreflex
* Renin-angiotensin system
** Renin
** Angiotensin
* Juxtaglomerular apparatus
* Aortic body and carotid body
* Autoregulation

Hemodynamics

Under most circumstances, the body attempts to maintain a steady mean arterial pressure.

When there is a major and immediate decrease (such as that due to hemorrhage or standing up), the body can increase the following:

* Heart rate
* Total peripheral resistance (primarily due to vasoconstriction of arteries)
* Inotropic state

In turn, this can have a significant impact upon several other variables:
* Stroke volume
* Cardiac output
* Pressure
** Pulse pressure (systolic pressure - diastolic pressure)
** Mean arterial pressure (usually approximated with diastolic pressure + 1/3 pulse pressure)
** Central venous pressure

Regional circulation

References

External links

*
* [http://www.cvphysiology.com/ "Cardiovascular Physiology Concepts"] - Comprehensive explanation of basic cardiovascular concepts, based on a textbook of the same name.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Physiology of dinosaurs — Note: In this article dinosaur means non avian dinosaur, since most experts regard birds as an advanced group of dinosaurs. The physiology of dinosaurs has historically been a controversial subject, particularly thermoregulation. Recently, many… …   Wikipedia

  • human cardiovascular system — ▪ anatomy Introduction       organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the… …   Universalium

  • Compliance (physiology) — This article is about the physiological term. For other uses, see Compliance (disambiguation). Compliance is a measure of the tendency of a hollow organ to resist recoil toward its original dimensions upon removal of a distending or compressing… …   Wikipedia

  • Nobel Prize winners by category (physiology or medicine) — ▪ Table Nobel Prize winners by category (physiology or medicine) year name country* achievement 1901 Behring, Emil von Germany work on serum therapy 1902 Ross, Sir Ronald U.K. discovery of how malaria enters an organism 1903 Finsen, Niels Ryberg… …   Universalium

  • Human physiology — is the science of the mechanical, physical, and biochemical functions of humans in good health, their organs, and the cells of which they are composed. The principal level of focus of physiology is at the level of organs and systems. Most aspects …   Wikipedia

  • Exercise physiology — is a discipline involving the study of how exercise alters the structure and function of the human body. Exercise Physiology requires diverse knowledge and considerable study of various physiologic responses to exercise. Topics studied in… …   Wikipedia

  • Environmental effects on physiology — The environment can have major influences on human physiology. Environmental effects on physiology are numerous; one of the most carefully studied effects is the alterations in thermoregulation in the body due to outside stresses. This is… …   Wikipedia

  • European Physiology Modules — The European Physiology Modules (EPM) is an International Standard Payload Rack for the Columbus Laboratory on board the ISS. The EPM rack was built by OHB System in Bremen.It includes the following science containers for medical experiments:*… …   Wikipedia

  • Cardiac output — (Q or or CO ) is the volume of blood being pumped by the heart, in particular by a left or right ventricle in the time interval of one minute. CO may be measured in many ways, for example dm3/min (1 dm3 equals 1000 cm3 or 1 litre). Q is… …   Wikipedia

  • Circulatory system — This article is about the organ system. For the band, see Circulatory System. For transport in plants, see Vascular tissue. Circulatory system …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.