Information about Mean Arterial Pressure
The mean arterial pressure (MAP) is a term used in medicine to describe a notional average blood pressure in an individual. It is defined as the average arterial pressure during a single cardiac cycle.
, where[1]
is usually small enough to be neglected in this formula.
can be approximated using the more easily measured systolic and diastolic pressures, 
and 
:[2][3]
or equivalently
is the pulse pressure, 
At high heart rates is more closely approximated by the arithmetic mean of systolic and diastolic pressures because of the change in shape of the arterial pressure pulse.
is considered to be the perfusion pressure seen by organs in the body.
It is believed that a of greater than 60 mmHg is enough to sustain the organs of the average person under most conditions.
If the falls significantly below this number for an appreciable time, the end organ will not get enough blood flow, and will become ischemic.
Calculation
, where[1]
is 
is is usually small enough to be neglected in this formula.
Estimation
At normal resting heart rates can be approximated using the more easily measured systolic and diastolic pressures, and :[2][3]
or equivalently
is the pulse pressure,
At high heart rates
is more closely approximated by the arithmetic mean of systolic and diastolic pressures because of the change in shape of the arterial pressure pulse.
Clinical significance
is considered to be the perfusion pressure seen by organs in the body.
It is believed that a
of greater than 60 mmHg is enough to sustain the organs of the average person under most conditions.
If the
falls significantly below this number for an appreciable time, the end organ will not get enough blood flow, and will become ischemic.
See also
References
1. ^ Cardiovascular Physiology Concepts: Mean Arterial Pressure, Richard E. Klabunde, Ph.D
2. ^ Physiology at MCG 3/3ch7/s3ch7_4
3. ^ [1]
2. ^ Physiology at MCG 3/3ch7/s3ch7_4
3. ^ [1]
Blood pressure (strictly speaking: vascular pressure) refers to the force exerted by circulating blood on the walls of blood vessels, and constitutes one of the principal vital signs.
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Cardiac cycle is the term referring to all or any of the events related to the flow of blood that occur from the beginning of one heartbeat to the beginning of the next.[1] The frequency of the cardiac cycle is the heart rate.
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Cardiac output (CO) is the volume of blood being pumped by the heart, in particular by a ventricle in a minute.
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Normal Output
Cardiac output is equal to the stroke volume (SV) multiplied by the heart rate (HR)...... Click the link for more information.
Vascular resistance is a term used to define the resistance to flow that must be overcome to push blood through the circulatory system. The resistance offered by the peripheral circulation is known as the systemic vascular resistance (SVR
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Central venous pressure (CVP) describes the pressure of blood in the thoracic vena cava, near the right atrium of the heart. CVP reflects the amount of blood returning to the heart and the ability of the heart to pump the blood into the arterial system.
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Systole is the contraction of heart chambers, driving blood out of the chambers. The chamber most often discussed is the left ventricle. However, all four chambers of the heart undergo systole and diastole in a timed fashion so that blood is propelled forward through the
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..... Click the link for more information.
Blood pressure (strictly speaking: vascular pressure) refers to the force exerted by circulating blood on the walls of blood vessels, and constitutes one of the principal vital signs.
..... Click the link for more information.
..... Click the link for more information.
Pulse pressure is the change in blood pressure seen during a contraction of the heart.
..... Click the link for more information.
Calculation
Formally it is the systolic pressure minus the diastolic pressure...... Click the link for more information.
In mathematics and statistics, the arithmetic mean (or simply the mean) of a list of numbers is the sum of all the members of the list divided by the number of items in the list. The arithmetic mean is what students are taught very early to call the "average".
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In physiology, perfusion is the process of nutritive delivery of arterial blood to a capillary bed in the biological tissue.
Tests of adequate perfusion are a part of patient triage performed by medical or emergency personnel in a mass casualty incident.
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Tests of adequate perfusion are a part of patient triage performed by medical or emergency personnel in a mass casualty incident.
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organ (Latin: organum, "instrument, tool") is a group of tissues that perform a specific function or group of functions. Usually there is a main tissue and sporadic tissues. The main tissue is the one that is unique for the specific organ.
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In medicine, ischemia (Greek ισχαιμία, isch- is restriction, hema or haema is blood) is a restriction in blood supply
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..... Click the link for more information.
Blood pressure (strictly speaking: vascular pressure) refers to the force exerted by circulating blood on the walls of blood vessels, and constitutes one of the principal vital signs.
..... Click the link for more information.
..... Click the link for more information.
Hypertension
Classification & external resources
ICD-10 I 10. ,I 11. ,I 12. ,
I 13. ,I 15.
ICD-9 401.x
OMIM 145500
DiseasesDB 6330
MedlinePlus 000468
eMedicine med/1106 ped/1097 emerg/267
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Classification & external resources
ICD-10 I 10. ,I 11. ,I 12. ,
I 13. ,I 15.
ICD-9 401.x
OMIM 145500
DiseasesDB 6330
MedlinePlus 000468
eMedicine med/1106 ped/1097 emerg/267
..... Click the link for more information.
Pulse pressure is the change in blood pressure seen during a contraction of the heart.
..... Click the link for more information.
Calculation
Formally it is the systolic pressure minus the diastolic pressure...... Click the link for more information.
Medical College of Georgia is the smallest of four research schools in the University System of Georgia (USG). MCG currently has 5 undergraduate and graduate schools on campus: The School of Medicine, School of Dentistry, School of Nursing, School of Allied Health, and Graduate
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