I was privileged to hear Bradley Bale, MD and Amy Doneen, MSN, ARNP talk about the development of coronary artery disease and cerebrovascular disease in patients with low or few cardiac risk factors. They cited American Heart Association studies looking at groups of men and women between ages 45 and 65 who have their first heart attack or stroke despite being in compliance with suggested lipid and blood pressure guidelines. They pointed out that the first Myocardial Infarct or Stroke occurred in 88% of women who met lipid guidelines and 66 % of men. These are people who do not smoke, do not have untreated or uncontrolled lipid levels, are not diabetics and who lead an active life style. They asked “why”?
Dr. Bale and Ms. Doneen work with the well respected cardiovascular Center of Excellence at the Cleveland Clinic program in Ohio, and believe that inflammation is the root of the problem. They believe that soft plaque composed of lipids and other cells lurks beneath the endothelial cells lining blood vessels. In the presence of inflammatory stimulants, this soft plaque ruptures suddenly through the endothelial level into the blood stream. When it comes in contact with the blood flowing through the vessels the body believes we are bleeding and cut and chemical mediators are released that initiate the formation of a clot. When this clot occurs in a small coronary artery we have a heart attack or myocardial infarction or precipitate a lethal irregular heartbeat. When this clot occurs in the blood vessels of the brain, we have an acute stroke or cerebrovascular accident.
The key to prevention in the so called low risk patient is to detect the inflammation in advance, and treat it. They are firm believers in performing B Mode Duplex ultrasounds of the carotid arteries in the neck to look for the presence of soft plaque beneath the endothelial cell lining. This soft plaque is distinctly different from the safe but calcified plaque we can see on CT scans used for cardiac scoring studies. They couple this imaging study with a series of complex blood tests which identify inflammation. These include a myeloperoxidase level, the Lp-PLA2 level, the urine microalbumen to creatinine ratio, a F2-IsoPs level and the cardiac specific CRP level.
These tests and studies in combination with a traditional history and exam, sugar and lipid levels and EKG can help us identify those “low risk” patients who actually are high risk for a heart attack or stroke. The cause of the inflammation is often difficult to spot and may be in your mouth with dental or periodontal disease or in your joints with inflammatory arthritis. Patients with excellent dental hygiene and normal appearing gums may harbor specific inflammatory bacteria that put them at risk. While this seems a bit forward thinking, remember we once questioned the research that showed that bacteria (H Pylori) caused gastric ulcers and intestinal bleeding.
I have begun instituting the inflammatory blood marker panels in my practice. Labs are sent to the Cleveland HeartLab for this purpose. I will be initiating periodic carotid ultrasound studies for the appropriate patients in the coming year.
It is often difficult for clinicians to distinguish snake oil sold for profit from cutting edge science. I have tried to spare my patients from worthless but profit driven products. I am convinced the Cleveland Clinic is just ahead of the rest of us in offering these services and I will make them available to the appropriate patients and will do it in a financially structured manner that does not add out of pocket cost to the patient. It’s not about adding another profitable income stream to the practice. It’s about identifying individuals who shouldn’t have a heart attack or stroke before they do.
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