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The pulmonary arteries by which they constrict during periods of low oxygen concentration i inferior vena cava one of the largest veins in the body, located in the chest; all blood in the lower body (below the heart) travels through this vein which then empties into the right atrium. order cheap generic viagra cheap generic viagra buy viagra viagra for sale buy viagra online generic viagra sold in united states cheap viagra cheap viagra buy cheap viagra generic viagra online
Inr (or pro-thrombin time) a blood test that measures how well your blood clots; used to adjust the dose of an anti-coagulant (blood thinner) called warfarin® (coumadin) internal jugular vein a large vein in the neck that carries blood from the head back to the heart and is often used in right heart catheterization j k l lungs the main organs of the respiratory system that have the function of transporting oxygen from the air into the blood and removing carbon dioxide from the blood; located in the chest, one on the left and one on the right. M mean arterial pressure an average of the systolic and diastolic blood pressures (mean arterial pressure = 2/3 diastolic pressure + 1/3 systolic pressure). Metered-dose inhalers (mdis) devices that deliver medications into the lungs in the form of a powder or liquid spray mitral valve a valve in the heart that separates the left atrium from the left ventricle preventing blood from flowing from the ventricle backwards into the atrium n nebulizer a device that uses pressurized air to volatize (turn into mist) a liquid medication that can then be inhaled. Nitric oxide a very potent vasodilator found in the blood and in lung tissues; can be used diagnostically during cardiac catheterization as an inhaled agent to test for acute vasodilatation or ‘vasoreactivity’. O obstructive sleep apnea a disorder in which the upper airway collapses or becomes too lax during sleep causing obstruction of the air passages and cessation of airflow to the lungs. Oxygen a gaseous molecule found in the air that serves as the fuel for all the cells in the body. P phosphodiesterase inhibitors a class of medications used to treat pah that act as vasodilators pneumonia an infection in the lung, typically causing fever, cough, and phlegm polysomnography also known as a sleep test; a test during which various parameters such as oxygenation, breathing, heart rhythm, brain waves, blood pressure are measured while you sleep. Pros.