PSL301H1 Lecture Notes - Lecture 8: Aortic Stenosis, Aorta, Diastole
PSL301H1 verified notes
8/38View all
Document Summary
Ventricle and atria signals are scattered all over the place. Apply shock to reset all cells: atrial fibrillation. Loss of p wave, electrical signal is not normal. Irregular r waves irregular ventricular beat: 3rd degree block. No communication between atrium and ventricles: 2nd degree block. P wave have to fire multiple times for av node can catch the signal. Contraction of heart will produce pressure gradients blood moves orderly through tissues. Blood goes from high pressure low pressure. Lower pressure at the right side of the heart (since aorta is sending blood to the whole body) Huge spike in pressure during isovolumic ventricular contraction phase (when ventricles contract, pressure inside builds up) High pressure when semilunar valves opens and blood rushes through the aorta. Only increase in pressure during atrial contraction phase. Stethoscope use to listen to beating of the heart via chest wall example of auscultation. 1st sound: lub closure of av valves.
