The American Heart Association says these are the most common warning signals of a heart attack;

• Uncomfortable pressure, fullness, squeezing or pain in the center of the chest lasting more than a few minutes.
• Pain spreading to the shoulders, neck or arms.
• Chest discomfort with lightheadedness, fainting, sweating, nausea or shortness of breath.

Less common warning signs of heart attack are...

• Atypical chest pain, stomach or abdominal pain.
• Nausea or dizziness.
• Shortness of breath and difficulty breathing.
• Unexplained anxiety, weakness or fatigue.
• Palpitations, cold sweat or paleness.

The American Stroke Association says these are the warning signs of stroke;

• Sudden numbness or weakness of the face, arm or leg, especially on one side of the body.
• Sudden confusion, trouble speaking or understanding.
• Sudden trouble seeing in one or both eyes.
• Sudden trouble walking, dizziness, loss of balance or coordination.
• Sudden, severe headache with no known cause.