What does an elevated systemic vascular resistance imply in cardiac catheterization?

What does an elevated systemic vascular resistance imply in cardiac catheterization?

• A. Decreased afterload
• B. No effect on afterload
• C. Increased afterload, potential cardiogenic shock or severe vasoconstriction; may worsen cardiac output
• D. Improved cardiac output

Answer: (C)

Elevated systemic vascular resistance means the arteries are more constricted, so the heart must pump against a higher pressure. That increases afterload, the pressure the left ventricle has to overcome to eject blood. When afterload rises, stroke volume tends to fall and cardiac output can decrease unless the heart compensates with stronger contractility or greater preload. In severe cases, this increased afterload can contribute to cardiogenic shock because forward blood flow is insufficient to meet tissue needs, even if arterial pressure looks high due to vasoconstriction. So the situation best describes increased afterload with potential, worsening impact on cardiac output.

Elevated systemic vascular resistance means the arteries are more constricted, so the heart must pump against a higher pressure. That increases afterload, the pressure the left ventricle has to overcome to eject blood. When afterload rises, stroke volume tends to fall and cardiac output can decrease unless the heart compensates with stronger contractility or greater preload. In severe cases, this increased afterload can contribute to cardiogenic shock because forward blood flow is insufficient to meet tissue needs, even if arterial pressure looks high due to vasoconstriction. So the situation best describes increased afterload with potential, worsening impact on cardiac output.