(HealthDay News) -- Angina is the term for chest pain that occurs when a portion of the heart isn't getting enough oxygenated blood.

The National Heart Lung and Blood Institute says the following triggers may be behind angina pain:

  • Coronary heart disease.
  • A blood clot.
  • Extremely hot or cold weather.
  • Emotional stress.
  • Smoking or using cocaine.
  • Medications that cause narrowing of the blood vessels.
  • Insufficient blood flow to the small arteries feeding the heart.