Heart disease. Unstable angina is usually due to a plaque rupture which limits the blood flow to an area of the heart. This is caused by increase in the size of the plaque or, elevated blood pressure or increased heart rate which make the narrowing more likely to occlude the artery. This causes a change in the usual angina, or the onset of new angina or cardiac chest pain.
Plaque rapture. Rapture of an atherosclerotlic plaque is the most common cause of unstable angina often associated with active inflammation within the plaque.
Increasing. Frequency severity.
Chest pain. Chest pain not relieved by rest. Please note that there are many instances of atypical presentations and it may range from vague feeling of discomfort, pressure on chest, shortness of breath, anxiety, sweating, feeling of impending doom, nausea vomiting. If you suspect unstable angina, get to an er asap, call 911.
Unstable angina. Unstable angina (acute coronary syndrome) " causes unexpected chest pain, and usually occurs while resting. The most common cause is reduced blood flow to the heart muscle." REF: http://www. Heart. Org/HEARTORG/Conditions/HeartAttack/DiagnosingaHeartAttack/Unstable-Angina_UCM_437513_Article. Jsp#.WT2aBfnyuM8.