Feature | Genetic Testing | December 13, 2017| Andrew Waxler, M.D., FACC

New AHA Scientific Statement Gives Comfort to the Use of Genomic Tests in Cardiology

The Corus CAD genetic test is a simple, noninvasive blood test that is clinically available for the assessment of obstructive coronary artery disease.

The Corus CAD gene expression test is a simple, noninvasive blood test that is available to assess a patient’s current likelihood of having obstructive coronary artery disease (CAD).

 

The diagnosis and management of cardiovascular disease has long followed a familiar approach. Patients see their physicians due to symptoms of chest discomfort, shortness of breath and generalized weakness among other complaints. Doctors have a number of proven tests with long track records available to help determine whether there is significant coronary artery disease (CAD). Doctors may utilize an electrocardiogram (ECG), a stress test – pharmacologic or exercise, an echocardiogram, magnetic resonance imaging angiography, CT coronary calcium scan or and invasive coronary angiogram.  These tests are useful when used at the right time and for the right patient.

The burden that doctors carry when deciding which test is right for their patients is a bit more complex. Doctors need to ensure they correctly diagnose their patient, while alleviating patient concerns when the doctor’s best judgement says a blockage in the heart artery is not the cause of their patients’ symptoms. This brings up an interesting question: Should the doctor still perform one of the tests mentioned above? And is this test the best option for my patient?

Some of these tests can be expensive and carry risks. Some can land patients right on an operating table. Yet, when patients are experiencing symptoms that could be a manifestation of CAD or other cardiac problem they often want reassurance beyond that of their doctors’ words. In this case, many doctors simply use one of the diagnostic tests mentioned above, in spite of the risks involved and the high costs. This puts a burden on the healthcare system. Simply stated, we need a more efficient way to determine whether patients need to go on for further cardiac evaluation or be treated for non-cardiac sources by ruling out CAD.

The recent American Heart Association’s (AHA) scientific statement, "The Expressed Genome in Cardiovascular Diseases and Stroke: Refinement, Diagnosis, and Prediction," recently published in the journal Circulation: Cardiovascular Genetics provides the comfort needed to broaden the use of a category of newer tests involving the expressed genome.[1] The statement described how the expressed genome can currently, as well as in the future, potentially be used to diagnose cardiac disease and predict who will develop coronary artery disease, stroke, heart failure and arrhythmias. One example highlighted in the Scientific Statement is the category of gene expression tests that look at what’s happening in the body right now. These tests can help provide a current assessment, or status, of the patients’ cardiovascular health.

There is one test the AHA paper cited as having the largest body of work on gene expression profiling for CAD, the Corus CAD test. Corus CAD is a simple, noninvasive blood test that is clinically available for the assessment of obstructive CAD or blockage in the heart arteries. The test factors in the patient’s age, sex and gene expression profile. I have personally used this test with great success in my practice. The AHA paper substantiates the broad data package that proves the test to be valid and useful. This test can be used to help a doctor rule out obstructive CAD early in the work-up, freeing both the patient from worry and the doctor from pursuing costlier and riskier diagnostic procedures. It is one of only two examples the AHA paper used to highlight the benefits of the expressed genome in cardiology.

The authors of the Scientific Statement concluded that gene expression tests are an exciting development and consider them to be an important part of the advancement of cardiac care. The paper asserts that we now have the ability to address disease at many levels that were previously inaccessible.

The applications of the Human Genome Project, which led to the advances discussed within, as well as genetic testing for cardiology in general, have allowed the field to further its diagnostic options.  And, I am excited to share that we can expect to see even more progress in the next five to 10 years in terms of broader applications of the various approaches born out of this research.

Editor’s note: Andrew R. Waxler, M.D., FACC, is a cardiologist with Berks Cardiologists, Ltd., Wyomissing, Pa., and treats patients at Penn State-St. Joseph Medical Center and Reading Health Center in Reading, Pa. He is board-certified in cardiology, internal medicine and nuclear cardiology.

 

Reference: 

1. Kiran Musunuru, Erik Ingelsson, Myriam Fornage, et al. “The Expressed Genome in Cardiovascular Diseases and Stroke: Refinement, Diagnosis, and Prediction: A Scientific Statement From the American Heart Association.” Circulation: Cardiovascular Genetics. 2017;10:e000037. Originally published July 31, 2017.

 

Related Content

Abbott Point-of-Care Blood Test Speeds Heart Attack Diagnosis
News | Blood Testing | October 26, 2018
For someone experiencing cardiac symptoms in the emergency room, every minute matters as physicians determine whether...
New Noninvasive Blood Glucose Test as Effective as Finger Prick

Image courtesy of University of Missouri School of Medicine

News | Blood Testing | October 24, 2018
For those living with diabetes, monitoring blood glucose accurately is necessary to prevent diabetes-related...
Abbott Receives CE Mark for High Sensitive Troponin-I Test
News | Blood Testing | October 16, 2018
October 16, 2018 — Abbott announced that its High Sensitive Troponin-I...
AI-Driven Blood Test Accurately Diagnoses Peripheral Artery Disease in Diabetic Patient
News | Blood Testing | September 04, 2018
Prevencio Inc. announced new data demonstrating its HART PAD test accurately diagnoses peripheral artery disease (PAD)...
More Sensitive Blood Test Diagnoses Heart Attacks Faster
News | Blood Testing | August 06, 2018
August 6, 2018 — A new test to assess a whether or not someone is having a...
Singulex cTnl Assay Can Identify Presence, Severity of CAD in Stable, Symptomatic Outpatients
News | Blood Testing | March 26, 2018
March 26, 2018 — Measurement of cardiac troponin in stable patients with chest pain using the ultra-sensitive Singule
Florida Medical Center First in State to Offer High Sensitive STAT Blood Test
News | Blood Testing | September 07, 2017
In July, The Heart Institute at Florida Medical Center became the first hospital in the state of Florida to offer the U...
Patients With Low Corus CAD Test Score Less Likely to Undergo Cardiac Referra
News | Blood Testing | May 02, 2017
CardioDx Inc. recently announced the publication of results from the multi-center, community-based PRESET Registry in...
New Blood Test Predicts Major Cardiac Events Better Than Clinical Evaluation of Other Common Risk Factors
News | Blood Testing | April 28, 2017
Prevencio Inc. announced the publication of data demonstrating that a simple new blood test is more accurate than...
New Study Pursues Universal Sample Bank for Troponin Tests
News | Blood Testing | April 13, 2017
April 13, 2017 — A study published recently in the American Association for Clinical Chemistry’s (AACC)...
Overlay Init