The symptoms of a heart attack require medical diagnosis and treatment. The key to saving your life or someone else's is to call 911 for help or get to the hospital emergency room ASAP!! The major symptoms that one might be having a heart attack are: 1. Discomfort and tightness in the chest,neck or arm (specifically the left arm) and these symptoms can occur during rest 2. Heartburn/Indigestion or Nausea/Vomiting 3. Whole body symptom include dizziness, fatigue, clammy (slimy) skin, cold sweats or profuse sweating 4. Other symptoms include anxiety, heart palpitations, shortness of breath and shoulder pain.