Excessive afterload can lead to which outcome during systole?

• A. Increased stroke volume with preserved EF
• B. Reduced stroke volume and possible reduced EF
• C. Immediate improvement in contractility
• D. No change in ventricular pressure

Answer: (B)

Excessive afterload means the ventricle must generate a much higher pressure to open the aortic valve and eject blood. That increased resistance makes it harder for the ventricle to push blood out, so the stroke volume falls. If the heart’s contractile strength can’t compensate, the ejection fraction also drops because a smaller fraction of the filled ventricle is being ejected. So, the most accurate outcome during systole is a reduced stroke volume with a possible reduction in ejection fraction. An increased stroke volume or immediate contractile boost doesn’t align with pushing against high resistance, and ventricular pressure certainly changes as the ventricle works harder.