<s>[INST] Can heart failure occur without knowing it? [/INST] Heart failure can occur without any symptoms being felt by the patient. Or a person may just feel a chronic cough, decreased appetite, shortness of breath on lying down, or generalized weakness.

It is a chronic condition and progress is unpredictable and is different for each person. In many cases, the symptoms remain at a stable level for quite some time (months or years) before becoming worse. In some cases, the severity and symptoms may progress rapidly. Source: NARAYANA HEALTH . Link: https://www.narayanahealth.org/blog/common-patient-questions-related-to-heart-failure/. Field: Cardiovascular. Disease: Heart Failure </s>