What Is Angina Pectoris?
5. Unstable Angina
Unstable angina is less common than stable angina and represents a medical emergency. Indications of unstable angina include changes in your regular pattern of angina, such as chest pain that is more severe or prolonged than usual and discomfort that may not improve or go away with medication.
Unstable angina can signal a heart attack and should be treated as quickly as possible.
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