NRSG 4502 Lecture Notes - Lecture 2: Patent Ductus Arteriosus, Ductus Venosus, Ventricular Septal Defect
17 Mar 2016
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Document Summary
8/1000 live births, 25% require surgery/major intervention, ~30% die by age 1, ~28% have another anomaly, 90% survive through adulthood: etiology. Anatomic closure during first month of life: ductus arteriosus- functional closure 10-24 hours following birth. Cardiac output: volume of blood ejected by the heart in one minute. Contractility: ability of the cardiac muscle to act as an efficient pump. Preload: volume of blood returning to the heart. Afterload: resistance against which the ventricles must pump when ejecting blood. Sa node -> av node -> bundle of his -> purkinje fibers. Will not be tested on reading rhythms. S1; tricuspid/mitral are closing (blood going out of ventricles) Common clinical presentation of the child/infant with congenital heart. Usually present one of five ways (often combination) Measured by pao2 or arterial oxygen saturation (sao2) Reduction in tissue oxygenation d/t low sao2 and pao2.
