Skip to content

Smoking and Coronary Artery Disease

Font Size

Topic Overview

Quitting smoking is probably the most important step you can take to decrease your chance of coronary artery disease (CAD) and a heart attack. Smoking raises your risk of getting CAD and dying early from CAD.

Carbon monoxide, nicotine, and other substances in tobacco smoke can promote atherosclerosis and trigger symptoms of coronary artery disease. Smoking:

Did You Know?

Under the Affordable Care Act, many health insurance plans will cover preventive care services, including checkups, vaccinations and screening tests, at no cost to you. Learn more.

Health Insurance Center

  • Causes the platelets in your blood to clump together easily by making your blood cells more "sticky" and more likely to form clots. Clumping platelets can then block your coronary arteries and cause a heart attack.
  • Can cause spasms in your coronary arteries, which can reduce the blood flow to your heart in a way similar to that of atherosclerosis.
  • Can trigger irregular heartbeats (arrhythmias).
  • Lowers "good" cholesterol (high-density lipoprotein, or HDL). Cholesterol-carrying lipoproteins also more easily enter the walls of your arteries, where they can develop into a hard plaque and atherosclerosis.
  • Reduces the amount of oxygen that can be carried by red blood cells in the bloodstream.

Smoking also affects those around you. Secondhand smoke increases other people's risk of coronary artery disease.

What are the benefits of quitting smoking?

Your risk for CAD drops relatively soon after you quit smoking. After your first year of not smoking, your risk of heart disease decreases by half. Also, your risk of having a heart attack decreases when you stop smoking.1

When you quit smoking, you cut your risk of death even more by staying away from cigarettes for good. After 15 years of not smoking, your risk of death from heart disease is the same as if you had never smoked at all.1

If you have had angioplasty or coronary artery bypass graft surgery to repair narrowed or blocked arteries, quitting smoking can decrease the risk of those arteries narrowing again. Your doctor will urge you to quit smoking so you get the most benefit from these procedures.

How do I quit smoking?

Medicines and counseling can help you quit smoking. Talk with your doctor about ways to quit for good.

For more information, see the topic Quitting Smoking.

1

WebMD Medical Reference from Healthwise

Last Updated: March 12, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
Next Article:

Smoking and Coronary Artery Disease Topics

Hot Topics

WebMD Video: Now Playing

Click here to wach video: Dirty Truth About Hand Washing

Which sex is the worst about washing up? Why is it so important? We’ve got the dirty truth on how and when to wash your hands.

Click here to watch video: Dirty Truth About Hand Washing

Popular Slideshows & Tools on WebMD

bloodstream
Tips to help prevent clots.
checking blood sugar
Symptoms, diagnosis and treatment.
acupuncture needle on shoulder
Live and thrive.
gloved hand holding syringe
10 preventable diseases.
psoriasis
How to identify that bite.
man eating meal
Folates, green tea and more.
brain scan with soda
Tips to avoid complications.
disciplining a boy
Types, symptoms, causes.
Woman with stressed, fatigue
Get relief tips.
restroom sign
Food and drinks that make you go.
two male hands
Understanding RA.

Women's Health Newsletter

Find out what women really need.