Effect of Inflation
- Volume displacement results in increased diastolic pressure (30%):
- Increases coronary perfusion pressure and flow
- Increases myocardial oxygen delivery
- Higher mean pressure increases renal and systemic perfusion
Effects of Deflation
- Decreased afterload, and thus systolic pressure (10%), immediately following deflation:
- Vacuum like effect promotes forward flow and increases stroke volume
- Decreases end diastolic volume and ventricular wall stress
- Reduces myocardial oxygen demand
Overall Effects
- Improved ratio of myocardial oxygen supply to myocardial oxygen demand
- Improved myocardial performance and increased cardiac output (up to 20%)