Final answer:
High-output cardiac failure occurs when the heart is unable to meet the body's demands for oxygenated blood, even though the heart is pumping with normal or increased force. This can be caused by various conditions that increase the metabolic demands on the body. These conditions lead to increased cardiac output, which puts a strain on the heart and can eventually lead to heart failure.
Step-by-step explanation:
High-output cardiac failure occurs when the heart is unable to meet the body's demands for oxygenated blood, even though the heart is pumping with normal or increased force. This can be caused by various conditions that increase the metabolic demands on the body, such as hyperthyroidism, severe anemia, or arteriovenous fistulas. These conditions lead to increased cardiac output, which puts a strain on the heart and can eventually lead to heart failure.