5. Gastrointestinal Discomfort
It is common for patients with some forms of heart disease to experience a variety of gastrointestinal symptoms such as nausea, vomiting, heartburn, and even indigestion.
Although these symptoms are commonplace in the general population they rarely signify a serious illness unless they are present in conjunction with other symptoms on this list. For example, if a patient experiences nausea concurrently with sharp chest pains and abdominal discomfort, it may be a sign of a heart attack.
Although the exact mechanisms behind this phenomenon are not precisely known, it is believed that intra-abdominal fluid build-up due to reduced circulation may be responsible.