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Coronary Artery Disease

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Coronary Artery Disease

NIH - Medical Encyclopedia Coronary heart disease "Coronary heart disease (CHD) is a narrowing of the small blood vessels that supply blood and oxygen to the heart. CHD is also called coronary artery disease. Coronary heart disease is usually caused by a condition called atherosclerosis, which occurs when fatty material and a substance called plaque builds up on the walls of your arteries. This causes them to get narrow. As the coronary arteries narrow, blood flow to the heart can slow down or stop, causing chest pain (stable angina), shortness of breath, heart attack, and other symptoms. Coronary heart disease (CHD) is the leading cause of death in the United States for men and women. … Chest pain or discomfort (angina) is the most common symptom. You feel this pain when the heart is not getting enough blood or oxygen. How bad the pain is varies from person to person.

There are two main types of chest pain:

• Atypical chest pain -- often sharp and comes and goes. You can feel it in your left chest, abdomen, back, or arm. It is unrelated to exercise and not relieved by rest or a medicine called nitroglycerin. Atypical chest pain is more common in women.

• Typical chest pain -- feels heavy or like someone is squeezing you. You feel it under your breast bone (sternum). The pain usually occurs with activity or emotion, and goes away with rest or a medicine called nitroglycerin. Adults with typical chest pain have a higher risk of CHD than those with atypical chest pain.

Other symptoms include: • Shortness of breath • Heart attack -- in some cases, the first sign of CHD is a heart attack…

Tips for preventing CHD or lowering your risk of the disease: • Avoid or reduce stress as best as you can. • Don't smoke. • Eat well-balanced meals that are low in fat and cholesterol and include several daily servings of fruits and vegetables. • Get regular exercise. If your weight is considered normal, get at least 30 minutes of exercise every day. If you are overweight or obese, experts say you should get 60 to 90 minutes of exercise every day. • Keep your blood pressure, blood sugar, and cholesterol under control"

NHS – Coronary Heart Disease (Videos) “The main symptom of coronary heart disease is angina. Angina can be a mild, uncomfortable feeling similar to indigestion. In severe cases, it causes a feeling of extreme pressure on the chest, breathlessness, trapped air and belching. It is usually triggered by physical exercise or stressful situations, and tends to go away when you stop what you're doing, when you rest or when you take medication. Other symptoms include: Heart palpitations When you become aware of your heart beating irregularly or harder than normal. Heart attack If your arteries become completely blocked, you will have a heart attack. … Heart failure Heart failure occurs when the heart gradually gets too weak to pump blood around the body. This can cause fluid to build up in the lungs, making it increasingly difficult to breathe. Heart failure can happen suddenly (acute heart failure) or over a period of time (chronic heart failure).”

Highlighted Articles

Positive and negative affect and risk of coronary heart disease: Whitehall II prospective cohort study. (BMJ. 2008) “Smoking, hypertension, hypercholesterolaemia, and diabetes are established risk factors for coronary heart disease, a leading cause of morbidity and mortality in Western industrialised countries.1 2 However, psychological factors, such as emotions, may also have a role in the development of coronary heart disease.3 4 Several prospective studies have found anxiety, hostility/anger, and depression to be associated with an increased risk of coronary heart disease in healthy participants.3 5 As the relative importance of these three negative emotions on risk of coronary heart disease remains largely undefined,6 7 they have been hypothesised to be the components of a single underlying factor, labelled negative affect. Negative affect refers to “stable and pervasive individual differences in mood and self-concept characterised by a general disposition to experience a variety of aversive emotional states.”5 8 High negative affect has been described as a general tendency to report “distress, discomfort, dissatisfaction, and feelings of hopelessness over time and regardless of the situation,” and low negative affect is characterised by “calmness and serenity.”8 9 Supporting this conceptualisation, a considerable neurobiological and psychological overlap between anxiety, hostility/anger, and depression has previously been shown.10 11 As attempts to link psychological factors to heart disease have focused on negative emotions, mostly depression,7 whether positive emotions might also have a role in the development of coronary heart disease remains unclear.“

[Heart disease and stroke] (Tidsskr Nor Laegeforen. 2007)"Most cases of heart disease and stroke are caused by atherosclerosis, and the two diseases have much in common with regards to risk factors, treatment and prognosis. Heart disease may also be a direct cause of stroke. About one in four cerebral infarctions are due to embolism from the heart to the brain, mainly because of atrial fibrillation, but also because of diseases such as acute myocardial infarction, dilated cardiomyopathy and prosthetic heart valves (cardioembolic stroke). Stroke can also be caused by a cardiogenic fall in blood pressure in patients with stenoses in pre- or intracerebral arteries (haemodynamic stroke). Patients with symptoms of atherosclerosis in one artery system should be treated as if they have a high risk of developing symptoms from other artery systems. The possibility of a cardiac embolic source should always be considered in patients with acute brain infarctions."

Optimal Medical Therapy with or without PCI for Stable Coronary Disease (NEJM 2007) "Background In patients with stable coronary artery disease, it remains unclear whether an initial management strategy of percutaneous coronary intervention (PCI) with intensive pharmacologic therapy and lifestyle intervention (optimal medical therapy) is superior to optimal medical therapy alone in reducing the risk of cardiovascular events. … Conclusions As an initial management strategy in patients with stable coronary artery disease, PCI did not reduce the risk of death, myocardial infarction, or other major cardiovascular events when added to optimal medical therapy."

Visit InfoMedSearch's Home Page for all InfoMedLinks Cardiovascular Topics: Atherosclerosis, Atrial Fibrillation, Coronary Artery Disease, Cholesterol - Lipids, General Cardiovascular, Heart Failure, Hypertension, Myocardial Infarction (Heart Attack), Peripheral Artery Disease, and Stroke.

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Coronary Artery Disease

Diagnosis, Imaging, and Screening

NEWS:

Coronary Calcification Doubted as a Good CV Risk Indicator

CT screening for coronary artery calcification can cause radiation-induced cancer “A study based on computer modeling of radiation risk suggests that widespread screening for the buildup of calcium in the arteries using computed tomography scans would lead to an estimated 42 additional radiation-induced cancer cases per 100,000 men and 62 cases per 100,000 women, according to a report in the July 13 issue of Archives of Internal Medicine, one of the JAMA/Archives journals. Coronary artery calcification is associated with coronary artery disease. "Computed tomography (CT) has been proposed as a tool for routine screening for coronary artery calcification in asymptomatic individuals as part of a comprehensive risk assessment," the authors write as background information in the article. Evidence suggests that this type of screening may detect the presence of calcium in the arteries of individuals who would be at low risk when assessed by traditional risk factors. "However, the potential risks of screening, including the risk of radiation-induced cancer, have to be considered along with the potential benefits." “

High Calcium Level May Signal Heart Danger “CAD, the most common type of heart disease, is the leading cause of death in the U.S. for both men and women, killing more than 500,000 Americans each year. CAD is a condition in which plaque, consisting of cholesterol, calcium, fat and other substances, builds up inside the arteries that supply blood to the heart. When plaque builds up in the coronary arteries, blood flow to the heart is reduced and may lead to arrhythmia, heart attack or heart failure. Single photon emission computed tomography (SPECT) myocardial perfusion imaging is a diagnostic procedure that provides excellent three-dimensional images of the coronary arteries to assist in the diagnosis and treatment of CAD. Currently, calcium scoring—measuring the amount of calcium in the arteries—is used to screen cases of suspected CAD, but is not used in cases of known CAD. Dr. Hacker and colleagues set out to determine if calcium scoring would lend additional prognostic value to SPECT findings in patients with known, stable CAD. “

Less Than One In Five Heart Problems Are Diagnosed Before Symptoms Appear

[Prehospital assessment and treatment decisions of a suspected acute coronary syndrome: what are the problems? Results of the "Emergency Doctor and Acute Myocardial Infarction" study (NAAMI)] (Dtsch Med Wochenschr. 2009)

ARTICLES:

Should I have a coronary calcium scan to check for heart disease?

JOURNAL ARTICLES:

Coronary Artery Calcification Screening: Estimated Radiation Dose and Cancer Risk (Arch Intern Med 2009) “Results The radiation dose from a single coronary artery calcification computed tomographic scan varied more than 10-fold (effective dose range, 0.8-10.5 mSv) depending on the protocol. In general, higher radiation doses were associated with higher x-ray tube current, higher tube potential, spiral scanning with low pitch, and retrospective gating. The wide dose variation also resulted in wide variation in estimated radiation-induced cancer risk. Assuming screening every 5 years from the age of 45 to 75 years for men and 55 to 75 years for women, the estimated excess lifetime cancer risk using the median dose of 2.3 mSv was 42 cases per 100 000 men (range, 14-200 cases) and 62 cases per 100 000 women (range, 21-300 cases).”

Is coronary computed tomographic angiography the “gold standard” for coronary artery disease? (Journal of Cardiovascular Computed Tomography 2009)

[Noninvasive diagnostic of coronary artery disease.] (Ther Umsch. 2009)

The triglyceride/high-density lipoprotein cholesterol ratio predicts all-cause mortality in women with suspected myocardial ischemia: a report from the Women's Ischemia Syndrome Evaluation (WISE). (Am Heart J. 2009) “CONCLUSION: Among women with suspected ischemia, the TG/HDL-C ratio is a powerful independent predictor of all-cause mortality and cardiovascular events.”

 

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