KINE 2011 Lecture Notes - Pulmonary Artery, Pulmonary Valve, Qrs Complex
29 Mar 2014
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Document Summary
Qrs complex= ventricular depolarization (contraction); when muscle contract the pressure in ventricle rises at point #9 (red) and gets above pressure in atrium and closes the av valve, Cardiac cycle (i)systole (contraction) (ii)diastole (relaxation; generally longer) Endystolic vol= vol after the heart has been filled with blood (edv) Ensystolic vol= blood left in the ventricle after it contract (still 60-75ml of blood in the ventricle); they are never empty. (esv) Remember to read the figure from the book. The diff btw left and right ventricles are pressure . Pressure in aorta and ventricle go from 80 to 120. Right ventricle goes to 0 in the ventricle and slightly above in pulmonary artery. Blood drops of its pressure when it goes tissues. Right side of heart pressures are almost 0, which provides no resistance for blood to come back to the heart, this allows blood to come back to the heart, since there is no pressure stopping it.
