article_snippet: In the UK, 2.3 million people are living with coronary heart disease, the major cause of heart attacks and unstable angina ( the type that doesn't occur upon exertion but strikes randomly, and persists even at rest).
article_snippet: this results in better outcomes after a patient suffers from unstable angina or a heart attack. '
article_snippet: There are two types of angina, called stable and unstable angina.
article_snippet: Attacks of stable angina usually occur when the heart is forced to work harder, for example during physical activity or emotional stress.
article_snippet: These are known as angina triggers.
article_snippet: The symptoms of stable angina usually improve if you rest for a few minutes.
article_snippet: Unstable angina is more unpredictable.
article_snippet: Unstable angina can develop without any obvious triggers and can persist even when you are resting.
article_snippet: Attacks of unstable angina may last longer than a few minutes and do not always respond to treatments used for stable angina.
highlights_snippet: Looked at heart attack patients and those diagnosed with unstable angina .
  