Diagnosing coronary artery disease

Diagnosing coronary artery disease (CAD) can be a challenge for both patients and their doctors because there are so many people at risk for CAD and so many tests that can be used. Risk factors of heart disease Who should be tested, and which tests should they have? What Is CAD?

CAD is a chronic disease of the coronary arteries. Heart disease wiki In CAD, atherosclerosis causes the smooth, elastic lining of the arteries to become hardened, stiffened and swollen by ” plaques,” which are deposits of calcium, fats, and abnormal inflammatory cells.

These plaques can protrude into the channel of the artery, causing a partial blockage of blood flow, a condition that often causes angina.


Anesthesia for congenital heart disease 3rd edition The plaques can also suddenly rupture, causing a blood clot to form acutely within the coronary artery that produces a sudden obstruction of blood flow. Pediatric heart disease Most myocardial infarctions ( heart attacks) are due to the acute rupture of a plaque.

CAD is a chronic, progressive disease that is usually present for many years before a person is aware that anything is wrong. Coronary heart disease effects All too often, the very first indication that there is a problem is when some irreversible event occurs, such as a myocardial infarction or cardiac arrest. Prevention of coronary heart disease This means that if you are at an increased risk for CAD, you should not wait for symptoms to develop before finding out whether you have a problem. Ischemic heart disease is most accurately defined as Diagnosing CAD

Traditionally, the diagnosis of CAD has relied on tests that look for evidence of “significant” blockages within the coronary arteries.

(In general, cardiologists consider a “significant” blockage to be one that obstructs 70% or more of an artery’s channel.)

Exercise testing (or stress testing) is often helpful in diagnosing partially blocked coronary arteries. Heart disease causes and symptoms Controlled stress testing can often bring out symptoms of angina and characteristic changes on the electrocardiogram (ECG) — findings which strongly suggest that blockages are present.

Performing a stress test in conjunction with either a thallium/Cardiolite study or an echocardiogram improves the ability to find partially blocked coronary arteries. Coronary heart disease stats Thallium and Cardiolite are radioactive substances that are injected into a vein during exercise. Coronary heart disease diagnosis These substances are carried to the heart muscle by the coronary arteries, thus allowing the heart to be imaged with a special camera. Exercise heart disease If one or more of the coronary arteries are partially blocked, the areas of heart muscle supplied by those arteries show up on the image as dark spots. Heart disease symptoms women The echocardiogram creates an image of the beating heart using sound waves. Coronary artery disease journal articles Any abnormal movement in the heart muscle seen on the echocardiogram during exercise suggests CAD.

If stress testing strongly suggests that one or more blockages are present, patients generally are referred for cardiac catheterization. Hypertensive heart disease icd 9 The purpose of the catheterization is to fully characterize the location and extent of all coronary artery blockages, usually for the purpose of angioplasty, stenting or bypass surgery.

Noninvasive tests are being developed that may someday replace the need for cardiac catheterization. Diabetes and heart disease These include the multislice CT scan and cardiac MRI. Congenital heart disease can be corrected with Unfortunately, neither of these approaches today can entirely replace the need for cardiac catheterization.

Identifying Plaques that Are Not Causing Significant Blockages

In recent years, cardiologists have recognized that both myocardial infarctions and unstable angina are caused by the rupture of the plaques in coronary arteries. Heart disease in dogs It turns out that in many if not most cases, the plaques that end up rupturing would have been considered “nonsignificant” (i.e., not causing a significant blockage) prior to their rupture. Coronary heart disease vs coronary artery disease This is why we often hear of people who suffer a heart attack soon after being told they have no significant CAD. Reversing heart disease (This is what happened to TV journalist Tim Russert in 2008.)

Since any plaque can rupture, it is useful to know whether plaques are present — even small ones. Signs of heart disease in child People who have any amount of CAD should take steps to stabilize plaques and reduce the risk of plaque rupture. Valvular heart disease icd 9 code (Such measures often include risk factor management, lifestyle changes, statins, and aspirin.)

Calcium scans are emerging as a useful way of detecting the presence of even small amounts of CAD. Coronary heart disease statistics worldwide Calcium scans are a form of CT scanning that can quantify a number of calcium deposits in the coronary arteries. Ischemic heart disease icd 9 code Since calcium deposits generally occur in plaques, measuring the amount of calcium in the arteries yields an indication of whether CAD (and therefore plaques) is present as well as how extensive the CAD may be. Structural heart disease By alerting you that you have at least enough CAD to produce “silent” plaques, the calcium scan can give you an opportunity to change your lifestyle, and perhaps take appropriate medications, while there’s still time to do so.

Gibbons, RJ, Balady, GJ, Timothy Bricker, J, et al. What are the symptoms of heart disease ACC/AHA 2002 guideline update for exercise testing: summary article. Symptoms of heart disease women A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1997 Exercise Testing Guidelines). Most common form of heart disease J Am Coll Cardiol 2002; 40:1531.

Califf, RM, Armstrong, PW, Carver, JR, et al. Congenital heart disease diagrams Task Force 5. Ischemic heart disease is a condition in which Stratification of patients into high, medium and low-risk subgroups for purposes of risk factor management. Is coronary heart disease the same as cardiovascular disease J Am Coll Cardiol 1996; 27:1007.

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