The difference between an oxygen concentrator and an oxygen cylinder for heart failure elderly 85 years old with breath-holding is that the oxygen concentrator is more convenient to use and can be used continuously, and the oxygen cylinder needs to be replaced with the next bottle when it is used up. The rest in the therapeutic effect there is no significant difference. Some patients with heart failure need long-term home oxygen therapy, and compressed oxygen cylinders and home oxygen concentrators are eligible for long-term oxygen therapy. Compressed oxygen cylinders have poor safety and low initial investment, but long-term price is expensive and inconvenient to carry. The home oxygen concentrator has a larger initial investment, but the long-term cost is low (the molecular sieve inside can be used for several years), and it is safe, and the most important thing is that it can be used continuously for a long time without any transportation, but it also has disadvantages, such as loud noise. Therefore, if heart failure patients need long-term oxygen intake, they can consult with professional physicians and choose the way of using oxygen reasonably according to their own conditions.