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What is Heart Failure? - American Heart Association
Heart failure - Symptoms and causes - Mayo Clinic
Congestive Heart Failure: Symptoms, Stages & Treatment - Cleveland Clinic
Understanding Heart Failure -- the Basics - WebMD
About Heart Failure | Heart Disease | CDC - Centers for Disease …
Heart Failure - What Is Heart Failure? - NHLBI, NIH
Types of Heart Failure - American Heart Association
What is heart failure? - Heart Foundation
Heart Failure: Symptoms, Causes, and Types - Healthline
Heart Failure - American Heart Association