Afterload - Systemic Vascular Resistance Index (SVRI)
- If the afterload (SVRI) is increased, the heart must pump with more power to eject the same amount of blood as before.
- The higher the afterload, the less the cardiac output.
- The lower the afterload, the higher the cardiac output.
If the afterload exceeds the performance of the myocardium, the heart may decompensate.