Understanding Heart Failure Compensation Mechanisms

What is the primary goal of compensation in heart failure?

• To decrease heart rate

• To increase cardiac output

• To reduce blood pressure

• To eliminate heart failure

How does the sympathetic nervous system respond to decreased cardiac output?

• By increasing stroke volume and heart rate

• By decreasing heart rate

• By reducing blood volume

• By relaxing blood vessels

What happens when the sympathetic nervous system is overused?

• It becomes more effective

• It increases blood pressure

• It causes immediate heart failure

• It down-regulates and becomes less effective

What is preload in the context of heart function?

• The pressure in the atria after filling

• The pressure in the ventricles after filling but before contraction

• The pressure in the ventricles after contraction

• The pressure in the atria during contraction

According to the Frank-Starling law, what effect does increased preload have?

• Decreases heart rate

• Increases heart rate

• Increases stroke volume

• Decreases stroke volume

What is a potential risk of increasing preload too much?

• Increased heart rate

• Decreased oxygen demand

• Improved heart function

• Cell death due to increased oxygen demand

What is myocardial hypertrophy?

• An increase in heart muscle mass

• An increase in blood pressure

• A decrease in blood volume

• A decrease in heart muscle mass

What is a consequence of myocardial hypertrophy?

• Improved heart efficiency

• Decreased oxygen demand

• Increased chamber size

• Reduced chamber size and increased oxygen demand

What is the relationship between compensation and decompensation in heart failure?

• Compensation and decompensation are unrelated

• Compensation always prevents decompensation

• Decompensation improves heart function

• Compensation can lead to decompensation over time

Which of the following is NOT a mode of compensation in heart failure?

• Sympathetic nervous system activation

• Increased preload

• Decreased blood pressure

• Myocardial hypertrophy