What causes a coronary artery spasm?

What causes a coronary artery spasm?

Certain heart conditions can cause a coronary artery spasm, including:

• Atherosclerosis, when your arteries build up with plaque and become narrow.
• High blood pressure.
• High cholesterol.

Often, something triggers a coronary artery spasm, such as:

• Tobacco use.
• Exposure to cold temperatures.
• Extreme stress.
• Use of stimulants, such as amphetamines or cocaine.