February 18th, 2011 by Mary Knudson in News, Opinion
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This was the Guest Blog at Scientific American on February 16th, 2011.
New wave of MRI-safe pacemakers set to ship to hospitals
This week Medtronic will begin shipping to hospitals in the United States the first pacemaker approved by the FDA as safe for most MRI scans. For consumers, it is a significant step in what is expected to be a wave of new MRI-compatible implanted cardiac devices.
But this is an example of one technology chasing another and the one being chased, the MRI scanner, is changing and is a step ahead of the new line of pacemakers. The pacemaker approved for U.S. distribution is Medtronic’s first-generation pacemaker with certain limitations, while its second-generation MRI-compatible pacemaker is already in use in Europe where approval for medical devices is not as demanding as it is in the U.S. So let’s check out what this is all about — what it means now for current and future heart patients and where it may be headed.
We are all born with a natural pacemaker that directs our heart to beat 60 to 100 times a minute at rest. The pacemaker is a little mass of muscle fibers the size and shape of an almond known medically as the sinoatrial node located in the right atrium, one of four chambers of the heart. The natural pacemaker can last a lifetime. Or it can become defective. And even if it keeps working normally, some point may not function well along the electrical pathway from the pacemaker to the heart’s ventricles which contract to force blood out to the body.
Millions of people in the world whose hearts beat too fast, too slow, or out of sync because their own pacemaker is not able to do the job right, follow their doctors’ recommendation to get an artificial pacemaker connected to their heart to direct its beating. The battery-run pacemaker in a titanium or titanium alloy case the size of a small cell phone, (why can’t it be the size of an almond?) is implanted in the upper left chest, just under the skin, with one or two insulated wire leads connecting to the heart. It can be programmed to run 24/7 or to only operate when the heart reaches a certain state of irregular beating. Read more »
*This blog post was originally published at HeartSense*
February 10th, 2011 by PJSkerrett in Health Tips, Research
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As a youngster, I loved being part of the baby boom — it meant there were dozens of kids on my block who were ready to play hide-and-seek or join mysterious clubs. Now that I’m of an AARP age, there’s one club I don’t want to join: The one whose members have bypass scars, pacemakers, or other trappings of cardiovascular disease. The American Heart Association’s (AHA) gloomy new forecast on cardiovascular disease tells me it won’t be easy to avoid.
The AHA foresees sizeable increases in all forms of cardiovascular disease (see table) between now and 2030, the year all of the boomers are age 65 and older. Those increases will translate into an additional 27 million people with high blood pressure, eight million with coronary heart disease, four million with stroke, and three million with heart failure. That will push the number of adult Americans with some form of heart disease to 110 million.
(Percentages refer to the percentage of Americans aged 18 years and older.)
If the AHA’s projections are accurate, the cost of treating cardiovascular disease would balloon from $272 billion today to $818 billion in 2030. Add in the cost of lost productivity, and it jumps to more than $1 trillion. Yikes!
Although obesity and inactivity are part of the problem, much of the increase comes from the graying of the baby boom. We can’t stop boomers from aging, but we can fight cardiovascular disease, a condition the AHA calls “largely preventable.” Read more »
*This blog post was originally published at Harvard Health Blog*
February 1st, 2011 by RyanDuBosar in News, Research
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Real total direct medical costs of cardiovascular disease (CVD) could triple, from $273 billion to $818 billion (in 2008 dollars) by 2030. Real indirect costs, such as lost productivity among the employed and unpaid household work, could increase 61 percent, from $172 billion in 2010 to $276 billion.
Results appeared in a policy statement of the American Heart Association.
CVD is the leading cause of mortality and accounts for 17 percent of national health expenditures, according to the statement. How much so? U.S. medical expenditures rose from 10 percent of the Gross Domestic Product in 1985 to 15 percent in 2008. In the past decade, the medical costs of CVD have grown at an average annual rate of 6 percent and have accounted for about 15 percent of the increase in medical spending.
The spending is associated with greater life expectancy, “suggesting that this spending was of value,” the authors wrote. But as the population ages, direct treatment costs are expected to increase substantially, even though lost productivity won’t, since seniors are employed at lower rates.
If current prevention and treatment rates remain steady, CVD prevalence will increase by about 10 percent over the next 20 years. The estimate reflects an aging population, and one that is increasingly Hispanic. To prepare for future cardiovascular care needs, the American Heart Association projected future costs. By 2030, 40.5 percent (116 million) of the population is projected to have some form of CVD. Read more »
*This blog post was originally published at ACP Internist*
January 12th, 2011 by PJSkerrett in Better Health Network, Health Tips
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Here’s an important equation that all of us — doctors include — should know about healthcare, but don’t:
More ≠ Better
“More does not equal better” applies to diagnostic procedures, screening tests meant to identify problems before they appear, medications, dietary supplements, and just about every aspect of medicine.
That scenario is spelled out in alarming detail in the Archives of Internal Medicine. Clinicians at the Cleveland Clinic describe the case of a 52-year-old woman who went to her community hospital because she had been having chest pain for two days. She wasn’t having symptoms of a heart attack, such as shortness of breath, unexplained nausea, or a cold sweat, and her electrocardiogram and other tests were fine. The woman’s doctors concluded that her chest pain was probably due to a muscle she had pulled or strained during her recently begun exercise program to lose weight.
To “reassure her” that she wasn’t having a heart attack, the emergency department team recommended she have a CT scan of her heart. This noninvasive procedure can spot narrowings in coronary arteries and other problems that can interfere with blood flow to the heart. When it showed a suspicious area in her left anterior descending artery (a key artery nourishing the heart), she underwent a coronary angiogram. This involves inserting a thin wire called a catheter into a blood vessel in the groin and deftly maneuvering it into the heart. Once in place, equipment on the catheter is used to make pictures of blood flow through the coronary arteries. Read more »
*This blog post was originally published at Harvard Health Blog*
December 17th, 2010 by RyanDuBosar in Better Health Network, Research
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Six of the nation’s leading healthcare systems will collaborate on outcomes, quality, and costs across eight common conditions or procedures in an effort to share best practices and reduce costs with the entire healthcare system.
Cleveland Clinic, Dartmouth-Hitchcock, Denver Health, Geisinger Health System, Intermountain Healthcare, and Mayo Clinic will to share data among their 10 million patients with The Dartmouth Institute, which will analyze the data and report back to the collaborative and the rest of the country, according to a press release.
The collaborative will focus on eight conditions and treatments for which costs have been increasing rapidly and for which there are wide variations in quality and outcomes across the country. The first three conditions to be studies are knee replacement, diabetes, and heart failure. They will be followed by asthma, weight loss surgery, labor and delivery, spine surgery, and depression.
*This blog post was originally published at ACP Internist*
