Coronary heart disease is a common term for the buildup of plaque in the heart’s arteries that could lead to heart attack. But what about coronary artery disease? Is there a difference?
The short answer is often no — health professionals frequently use the terms interchangeably.
However, coronary heart disease , or CHD, is actually a result of coronary artery disease, or CAD, said Edward A. Fisher, M.D., Ph.D., M.P.H., an American Heart Association volunteer who is the Leon H. Charney Professor of Cardiovascular Medicine and also of the Marc and Ruti Bell Vascular Biology and Disease Program at the NYU School of Medicine.
With coronary artery disease, plaque first grows within the walls of the coronary arteries until the blood flow to the heart’s muscle is limited. View an illustration of coronary arteries. This is also called ischemia. It may be chronic, narrowing of the coronary artery over time and limiting of the blood supply to part of the muscle. Or it can be acute, resulting from a sudden rupture of a plaque and formation of a thrombus or blood clot.
The traditional risk factors for coronary artery disease are high LDL cholesterol, low HDL cholesterol, high blood pressure, family history, diabetes, smoking, being post-menopausal for women and being older than 45 for men, according to Fisher. Obesity may also be a risk factor.
“Coronary artery disease begins in childhood, so that by the teenage years, there is evidence that plaques that will stay with us for life are formed in most people,” said Fisher, who is former editor of the American Heart Association journal, ATVB. “Preventive measures instituted early are thought to have greater lifetime benefits. Healthy lifestyles will delay the progression of CAD, and there is hope that CAD can be regressed before it causes CHD.”
“Coronary artery disease is preventable,” agreed Johnny Lee, M.D., president of New York Heart Associates, and an American Heart Association volunteer. “Typical warning signs are chest pain, shortness of breath, palpitations and even fatigue.”
If you feel any of these symptoms, don’t delay — call 9-1-1.
Major risk factors that can't be changed
The risk factors on this list are ones you're born with and cannot be changed. The more of these risk factors you have, the greater your chance of developing coronary heart disease. Since you can't do anything about these risk factors, it's even more important for you to manage the risk factors that can be changed.
The majority of people who die of coronary heart disease are 65 or older. At older ages, women who have heart attacks are more likely than men are to die from them within a few weeks.
Male Sex (Gender)
Men have a greater risk of heart attack than women do, and they have attacks earlier in life. Even after menopause, when women's death rate from heart disease increases, it's not as great as men's.
Heredity (Including Race)
Children of parents with heart disease are more likely to develop it themselves. African Americans have more severe high blood pressure than Caucasians and a higher risk of heart disease. Heart disease risk is also higher among Mexican Americans, American Indians, native Hawaiians and some Asian Americans. This is partly due to higher rates of obesity and diabetes. Most people with a strong family history of heart disease have one or more other risk factors. Just as you can't control your age, sex and race, you can't control your family history. Therefore, it's even more important to treat and control any other risk factors you have.
Major risk factors you can modify, treat or control
Smokers' risk of developing coronary heart disease is much higher than that of nonsmokers. Cigarette smoking is a powerful independent risk factor for sudden cardiac death in patients with coronary heart disease. Cigarette smoking also acts with other risk factors to greatly increase the risk for coronary heart disease. Exposure to other people's smoke increases the risk of heart disease even for nonsmokers.
High blood cholesterol
As blood cholesterol rises, so does risk of coronary heart disease. When other risk factors (such as high blood pressure and tobacco smoke) are present, this risk increases even more. A person's cholesterol level is also affected by age, sex, heredity and diet. Here's the lowdown on:
- Total Cholesterol: Your total cholesterol score is calculated using the following equation: HDL + LDL + 20 percent of your triglyceride level.
- Low-density-lipoprotein (LDL) cholesterol = "bad" cholesterol
A low LDL cholesterol level is considered good for your heart health. However, your LDL number should no longer be the main factor in guiding treatment to prevent heart attack and stroke, according to the latest guidelines from the American Heart Association. For patients taking statins, the guidelines say they no longer need to get LDL cholesterol levels down to a specific target number. Lifestyle factors, such as a diet high in saturated and trans fats can raise LDL cholesterol.
- High-density-lipoprotein (HDL) cholesterol = "good" cholesterol
With HDL (good) cholesterol, higher levels are typically better. Low HDL cholesterol puts you at higher risk for heart disease. People with high blood triglycerides usually also have lower HDL cholesterol. Genetic factors, type 2 diabetes, smoking, being overweight and being sedentary can all result in lower HDL cholesterol.
Triglyceride is the most common type of fat in the body. Normal triglyceride levels vary by age and sex. A high triglyceride level combined with low HDL cholesterol or high LDL cholesterol is associated with atherosclerosis, the buildup of fatty deposits in artery walls that increases the risk for heart attack and stroke.
High blood pressure
High blood pressure increases the heart's workload, causing the heart muscle to thicken and become stiffer. This stiffening of the heart muscle is not normal, and causes the heart not to work properly. It also increases your risk of stroke, heart attack, kidney failure and congestive heart failure. When high blood pressure exists with obesity, smoking, high blood cholesterol levels or diabetes, the risk of heart attack or stroke increases even more.
An inactive lifestyle is a risk factor for coronary heart disease. Regular, moderate-to-vigorous physical activity helps reduce the risk of heart and blood vessel disease. Even moderate-intensity activities help if done regularly and long term. Physical activity can help control blood cholesterol, diabetes and obesity, as well as help lower blood pressure in some people.
Obesity and overweight
People who have excess body fat — especially if a lot of it is at the waist — are more likely to develop heart disease and stroke even if they have no other risk factors. Overweight and obese adults with risk factors for cardiovascular disease such as high blood pressure, high cholesterol, or high blood sugar can make lifestyle changes to lose weight and produce clinically meaningful reductions in triglycerides, blood glucose, HbA1c, and risk of developing Type 2 diabetes. Many people may have difficulty losing weight. But a sustained weight loss of 3 to 5% body weight may lead to clinically meaningful reductions in some risk factors, larger weight losses can benefit blood pressure, cholesterol, and blood glucose.
Diabetes seriously increases your risk of developing cardiovascular disease. Even when glucose levels are under control, diabetes increases the risk of heart disease and stroke, but the risks are even greater if blood sugar is not well controlled. At least 68% of people >65 years of age with diabetes die of some form of heart disease and 16% die of stroke. If you have diabetes, it's extremely important to work with your healthcare provider to manage it and control any other risk factors you can. Persons with diabetes who are obese or overweight should make lifestyle changes (e.g., eat better, get regular physical activity, lose weight ) to help manage blood sugar.
Other factors that contribute to heart disease risk
Individual response to stress may be a contributing factor. Some scientists have noted a relationship between coronary heart disease risk and stress in a person's life, their health behaviors and socioeconomic status. These factors may affect established risk factors. For example, people under stress may overeat, start smoking or smoke more than they otherwise would.
Drinking too much alcohol can raise blood pressure, increase risk of cardiomyopathy and stroke, cancer and other diseases. It can contribute to high triglycerides, and produce irregular heartbeats. Excessive alcohol consumption contributes to obesity, alcoholism, suicide and accidents. However, there is a cardioprotective effect of moderate alcohol consumption. If you drink, limit your alcohol consumption to no more than two drinks per day for men and no more than one drink per day for women. The National Institute on Alcohol Abuse and Alcoholism defines one drink as 1-1/2 fluid ounces (fl oz) of 80-proof spirits (such as bourbon, Scotch, vodka, gin, etc.), 5 fl oz of wine or 12 fl oz of regular beer. It's not recommended that nondrinkers start using alcohol or that drinkers increase the amount they drink.
Diet and Nutrition
A healthy diet is one of the best weapons you have to fight cardiovascular disease. The food you eat (and the amount) can affect other controllable risk factors: cholesterol, blood pressure, diabetes and overweight. Choose nutrient-rich foods — which have vitamins, minerals, fiber and other nutrients but are lower in calories — over nutrient-poor foods. Choose a diet that emphasizes intake of vegetables, fruits, and whole grains; includes low-fat dairy products, poultry, fish, legumes, nontropical vegetable oils, and nuts; and limits intake of sweets, sugar-sweetened beverages, and red meats. And to maintain a healthy weight, coordinate your diet with your physical activity level so you're using up as many calories as you take in.