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MEAN ARTERIAL PRESSURE (CO X SVR (CO = Cadiac output (CO (SV X HR (SV =…

- - - - SV X HR
        
        SV = Stroke volume
        
        SV
        
        Afterload
        
        The pressure against which the heart must work to eject blood during systole.
        
        Contractility
        
        Inotropy
        
        The force or energy of muscular contractions
        
        Chronotropy
        
        Rate of contractions
        
        Preload
        
        End diastolic volume that stretches the right or left ventricle of the heart to its greatest dimensions under variable physiologic demand.
        
        HR = Heart rate
        
        HR
        
        PNS activity
        
        Vagal tone decreases HR
        
        Intrinsic rate
        
        Natural rate of discharge of cardiac tissues in absence of other factors
        
        SNS activity
        
        Increases firing of SA node
        
        Pharmacologic
        
        Positive chronotropes increase HR
      - Volume of blood pumped per minute
  - - - Influenced by
        
        Vasoconstriction/vasodilation
        
        Blood vessel compliance/elasticity
        
        Blood viscosity
        
        Blood volume
      - Resistance to blood flow offered by all of the systemic vasculature, excluding the pulmonary vasculature.