Heart failure is a medical condition in which the heart muscle is unable to supply blood according to the body's needs. According to the World Health Organization (WHO), an estimated 5 million people are newly diagnosed with heart failure each year worldwide.

On average, a person's life is about 80 years, the heart must beat more than 3 billion times. Working continuously without stopping like that, heart failure is inevitable. So what are the symptoms of heart failure, how to recognize it for timely treatment?