Pressure Overload

• Pressure Overload:

  • disorders which increase resistance to ventricular out-flow
  • ventricles work consistently harder than normal
  • can be caused in the left ventricle by:
  • systemic hypertension - high bp = high resistance in circulatory system = ventricle requiring high forces to eject blood
  • aortic valve stenosis - valves becomes really stiff and hardens, becomes fibrotic and impregnated with calcium, causing valve to dysfunction, so it cant open properly causing a narrow high resistance point, and cant close properly
  • coarctation
• Pressure Overload:

  • disorders which increase resistance to ventricular out-flow
  • ventricles work consistently harder than normal
  • can be caused in the right ventricle by:
  • pulmonary hypertension - high bp = high resistance in circulatory system = ventricle requiring high forces to eject blood
  • pulmonary valve stenosis - valves becomes really stiff and hardens, becomes fibrotic and impregnated with calcium, causing valve to dysfunction, so it cant open properly causing a narrow high resistance point, and cant close properly
• Pressure Overload:

  • can be caused in the left ventricle by coarctation of the aorta
  • often occurs in babies, but can happen to adults as well, usually due to unknown infective episode which affects the musculature of the aorta, causing inflammation and fibrotic scarring of the lower section of the arch of the aorta and it becomes fibrotic
  • it becomes pulled down into a narrowed region through which blood flow has to pass