If you think may be experiencing the symptoms of a heart attack, do not wait to see if they go away. If you experience discomfort or pain in the chest, unusual shortness of breath (especially if you are a woman), heart palpitations, discomfort in the arms, back, neck or jaw, bluish fingernails, nausea (women) or lightheadedness, or have another condition such as diabetes or high blood pressure, call 911 immediately and ask for an ambulance.
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Source: ADAM Encyclopedia
Heart Attack SymptomsCommon signs and symptom of heart attack include:Chest pain or discomfort (angina), which can feel like pressure, squeezing,... Read more »