<s>[INST] What is heart failure? What does heart failure mean? [/INST] Heart failure is when your heart doesn’t work as well as it should. There are two types of heart failure: heart failure with reduced ejection fraction (also called systolic heart failure) and heart failure with preserved ejection fraction (also called diastolic heart failure).

If you have heart failure with reduced ejection fraction, your heart can’t pump blood very effectively, so less blood makes it out of the heart. If you have heart failure with preserved ejection fraction, your heart is stiff and can’t fully relax after pumping, so less blood enters the heart.

Heart failure isn’t the same as cardiac arrest, which is when your heart suddenly stops working. Instead, heart failure generally develops over time. Source: HEALTH PARTNERS. Link: https://www.healthpartners.com/blog/ask-a-cardiologist-answering-critical-questions-about-heart-failure/. Field: Cardiovascular. Disease: Heart Failure </s>