BIOL 1344 Lecture Notes - Lecture 6: Heart Valve, Great Vessels, Stroke Volume
2 Jun 2020
School
Department
Course
Professor
Document Summary
Force generation in cardiac tissue the force of cardiac contraction in proportion to the amount of calcium released into the cytoplasm during excitation-contraction coupling. Atrial systole: corresponds with contraction of the atria, atrial pressure: greater than ventricle, av valves: open, ventricle: blood volume increasing, eventually reaching the maximum they can hold (end diastolic volume, or edv) Early ventricular systole: corresponds with contraction of the ventricles, ventricular pressure: greater than atria, less than great vessels, blood volume: constant at edv, av valves: close, sl valves: closed. Later ventricular systole: ventricular pressure: greater than atria, greater than great vessels, blood volume: decreasing as stroke volume (sv) is ejected, until residual end systolic volume (esv) is left, av valves: closed, sl valves: open. Early ventricular diastole: corresponds to relaxation in ventricles, ventricular pressure: greater than atria, less than great vessels, blood volume: constant at esv, av valves: closed, sl valves: closed.
