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Pulmonary artery pressure

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Pulmonary artery pressure

Artery: Pulmonary artery
Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Pulmonary artery labeled at upper right.)
Diagram of the alveoli with both cross-section and external view
Latin truncus pulmonalis, arteria pulmonalis
Gray's subject #141 543
Source right ventricle   
Vein pulmonary veins
Precursor truncus arteriosus
MeSH Pulmonary+Artery

The pulmonary artery carries deoxygenated blood from the heart to the lungs. It is one of the only arteries (other than the umbilical arteries in the fetus) that carry deoxygenated blood.

In the human heart, the pulmonary trunk (pulmonary artery or main pulmonary artery) begins at the base of the right ventricle. It is short and wide—approximately 5 centimetres (2.0 in) in length and 3 centimetres (1.2 in) in diameter. It then branches into two pulmonary arteries (left and right), which deliver de-oxygenated blood to the corresponding lung.

In contrast to the pulmonary arteries, the bronchial arteries supply nutrition to the lungs themselves.

Role in disease

Pulmonary hypertension occurs alone and as a consequence of a number of lung diseases. It can also be a consequence of heart disease (Eisenmenger's syndrome) but equally a cause (right-ventricular heart failure); it also occurs as a consequence of pulmonary embolism and scleroderma. It is characterised by reduced exercise tolerance. Severe forms, generally, have a dismal prognosis.

Pulmonary artery pressure

The pulmonary artery pressure is a measure of the blood pressure found in the pulmonary artery. Mean pulmonary arterial pressure is normally 9 - 18 mmHg.[1]


It is usually higher than the pulmonary wedge pressure.

It can be elevated in sickle cell disease.[2]

It can be used to measure pulmonary artery hypertension.[3]

Additional images

See also

External links

  • GPnotebook
  • eMedicine Dictionary
  • Great vessels"
  • 20:07-0105 - "Heart: Openings of Great Vessels into the Pericardial Sac"
  • Mediastinal surface of the right lung."
  • 19:06-02 - "Mediastinal surface of the left lung."
  • 13802loa

References

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