KINESIOL 2F03 Lecture Notes - Lecture 4: Ductus Arteriosus, Ductus Venosus, Umbilical Vein
28 Nov 2017
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Fetal blood: umbilical blood (blood coming from umbilical vein) nor fetal blood (blood circulating fetal tissues) are as saturated with oxygen as regular people, compensation multiple forms of fetal hemoglobin, better affinity to o2 than regular hemoglobin. Heart size changes: fetal heart, left side = right side, heart mass increases (at a slower rate than rest of body, left atrium/ventricle grows faster than right, specifically, left ventricle becomes very thick. Heart rate changes decreases with age: there are 2 types of resting hr, resting, basal basement ; lower than resting, girls > boys hr, they have to produce more beats for the same amount of blood. Ecg change: ecg measures the electrical activity of the heart. Ecg amplitude changes adults will have a larger amplitude than newborns. Heart can have irregular ecg activity known as arrhythmia. Causes of arrhythmia: heart muscle changes, heart muscle position changes, lack of ans stabilization *, cardiac conductivity **
