Ch 23 key terms.txt

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Ch 23 key terms.txt
2011-09-20 05:26:06
23 key terms

Ch 23 key terms.txt
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  1. 12-lead electrocardiogram (ECG)
    A standardized recording of the electrical activity of the heart and may be used to detect heart irregularities, lack of oxygen to parts of the heart, and enlargement of the chambers.
  2. afterload
    The load that the ventricular muscle exerts when it is pushing its contents into the aorta
  3. amplification
    The end result of the process in the formation of the erythrocyte whereby one rubriblast can form 14 to 16 erythrocytes
  4. blood pressure
    Force exerted by the blood against the walls of the blood vessel to maintain tissue perfusion during rest and activity.
  5. buffy coat
    An area that is light-colored and contains the mostly white blood cells seen in a test tube that is centrifuged or allowed to stand.
  6. cellular components
    The parts of the blood that are derived from the stem cell These include erythrocytes, granulocytes, platelets, B lymphocytes, and T lymphocytes
  7. demargination
    A process whereby the granulocytes can suddenly leave the peripheral tissues
  8. echocardiogram
    A noninvasive test in which ultrasound is used to reflect cardiac structures It can be performed at rest or in conjunction with a stress test
  9. effluent ejection fraction (EF)
    An index that estimates contractile function of the left ventricle The expected ejection fraction is 60 to 70 percent.
  10. hemosiderosis
    A condition in which iron is toxic to the cells.
  11. oxyhemoglobin dissociation curve
    A relationship between the partial pressure of oxygen in the blood and the saturation of hemoglobin with oxygen.
  12. plasma
    The liquid portion of the circulation system
  13. preload
    The amount the myocardial fibers are stretched at the end of diastole. This stretch reflects the amount of pressure and volume in the ventricle immediately preceding systole.
  14. serum
    The liquid part of blood after coagulation

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