Chapter4CardiovascularsystemSection 1 Pumping function of the heartSection2 ElectrophysiologicalpropertySection3 VascularsystemSection4 Regulation of the heart
Chapter 4 Cardiovascular system Section 2 Electrophysiological property Section 1 Pumping function of the heart Section 3 Vascular system Section 4 Regulation of the heart
What happens in the heart during eachcardiac cycle?CORRELATIONOFEVENTSINLEFTSIDEOFHEARTELECTROCAROIOGRAM·PressurePRESSURE mmHg120.VolumeLentAtrial8PressureDENTRICULARUOLUME.Valves120· Blood flowD-Ventricular diastole S-Ventricular systole
What happens in the heart during each cardiac cycle? • Pressure • Volume • Valves • Blood flow
The major external and internal parts of the heartare shown in this diagram.Copyright@The MctwoaArteriestoheadandarmAortaRight pulmonarLeft pulmonaryRightpulmonaryveirarterySuperior vena cavLeft pulmonaryveinsPulmonary trunkInteratrial septuLeftatriumLett (bicuspid)AVvalveRight atriumAortic semilunarvalveRightAV(tricuspid) valvLeft ventriclePapilary muscleInferiorvena cavInterventricularseptuChordae tendiMyocardiumRightventricEpicardiumPericardial fluid/spacePericardiumPumonanhilunar valveThe black arrows indicate the route taken by theblood as it is pumped along
The black arrows indicate the route taken by the blood as it is pumped along. The major external and internal parts of the heart are shown in this diagram
Cardiac cycleThe cardiac events that occur from beginning of oneheartbeat to the beginning of the next are called thecardiac cycle.Time: T oc 1/f = 60 s/ 75 = 0.8 sVentricleAtriasystole: 0.3 ssystole: 0.1 sdiastole: 0.5 sdiastole: 0.7 s
The cardiac events that occur from beginning of one heartbeat to the beginning of the next are called the cardiac cycle. Cardiac cycle Time：T ∝ 1/f ＝ 60 s/ 75 ＝ 0.8 s Atria systole: 0.1 s diastole: 0.7 s Ventricle systole: 0.3 s diastole: 0.5 s
Cardiac Cycle : whole heart diastole has 0.4 s.VentriclescontractcontracAtriumsrelaxVentriclesrelaxand fill
Cardiac Cycle contract : whole heart diastole has 0.4 s