Pathophysiology Hemodynamic basis of shock Compensatory mechanism Organ dysfunction
Pathophysiology Hemodynamic basis of shock Compensatory mechanism Organ dysfunction
Hemodynamic Basis of Shock THE HEMODY NAMIC EQUATION BP (blood pressure) (cardiac output) (systemic vascular resistance CO stroke volume (Sv)x heart rate SV end diastolic volume(EDV)-end systolic volume(ESv) EDV= venous return + ESv
Hemodynamic Basis of Shock
Blood flow autoregulation E20 15 1.0 autoregulation 0.5 0 100 150 200 MEAN ARTERIAL PRESSURE [mm Hg]
Blood flow autoregulation
Cardiac output ↑ Cardiac Output CO=HRX SV ↑H.Rate ↑ Stroke Volume ↑s sympathetic Extrinsic Control Strength of Cardiac Contraction +(frank starling mechanism) Activity Intrinsic Control Epinephrine ↑ED Intrinsic Control +↑ Venous Return
Cardiac output
Preload Decreased compliance Norma Fluid compliance End diastolic volume
Preload