Understanding Heart Failure: Visual Explanation for Students

heart failure means that the heart isn’t pumping as well as it should be. Congestive heart failure is a type of heart failure that requires seeking timely medical attention, although sometimes the two terms are used interchangeably.

Your body depends on the heart’s pumping action to deliver oxygen- and nutrient-rich blood to the body’s cells. When the cells are nourished properly, the body can function normally. With heart failure, the weakened heart can’t supply the cells with enough blood. 

• Enlarging. The heart stretches to contract more strongly and keep up with the demand to pump more blood. Over time this causes the heart to become enlarged.
• Developing more muscle mass. The increase in muscle mass occurs because the contracting cells of the heart get bigger. This lets the heart pump more strongly, at least initially.
• Pumping faster. This helps increase the heart’s output.

The body also tries to compensate in other ways:

• The blood vessels narrow to keep blood pressure up, trying to make up for the heart’s loss of power.
• The body diverts blood away from less important tissues and organs (like the kidneys), the heart and brain.

These temporary measures mask the problem of heart failure, but they don’t solve it. Heart failure continues and worsens until these compensating processes no longer work.

https://www.heart.org/en/health-topics/heart-failure/what-is-heart-failure