Causes of unstable angina

                               Unstable angina 

• Unstable angina is a condition in which your heart doesn't get enough blood flow and oxygen. It may lead to a heart attack.

•  Angina is a type of chest discomfort caused by poor blood flow through the blood vessels (coronary vessels) of the heart muscle (myocardium).

 Causes :

          Coronary artery disease due to atherosclerosis is the most common cause of unstable angina.                      Atherosclerosis is the buildup of fatty material, called plaque, along the walls of the arteries                        This causes arteries to become narrowed and less flexible. The narrowing can reduce blood                           flow to the heart, causing chest pain.

People with unstable angina are at higher risk of having a heart attack *  

 :Rare causes of angina are      

Abnormal function of tiny branch arteries without narrowing of larger arteries (called microvascul*        

( dysfunction or Syndrome x          

Coronary artery spasm*   

:Risk factors for coronary artery disease include * 

• Diabetes
• Family history of early coronary heart disease (a close relative such as a sibling or parent had heart disease before age 55 in a man or before age 65 in a woman)
• High blood pressure
• High LDL cholesterol
• Low HDL cholesterol
• Male sex
• Sedentary lifestyle (not getting enough exercise)
• Obesity
• Older age
• Smoking