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February 2017 Vol.5, No. 2 Inside this issue: Ask Dr. Grossman 2 1 Nutrition 6 Understanding and addressing dementia page 11 Research 8 YourHealthyHeart 20170124.indd 1 1/24/17 2:11 PM Ask Dr. Grossman Dr. Grossman’s responses to patient questions A PATIENT ASKS: Do acidic foods in general protect the BOTTOM LINE: At this time, we don’t have hard evidence that heart? Anecdotally or otherwise: aspirin (pH 3.0), grapefruit (pH 3.3), the pH of food, acid or alkaline, affords cardioprotection. However, apple cider vinegar (pH 2.9) are said to be healthy for you. Should research is underway to clarify the role of intestinal bacteria in we draw a broader conclusion, or are these specific cases? cardiovascular health. This may have important implications for our ANSWER: I am afraid that there is no convincing scientific evidence that acidic foods protect the heart. It is likely that the low diet, since what we eat can either help or harm the unsung heroes in our gut microbiome. Stay tuned! pH of aspirin and its cardioprotective properties are due to different A PATIENT ASKS: After reading a recent article about alcohol aspects of the acetylsalicylic acid molecule (this is the molecule that and atrial fibrillation, I am confused. Some evidence suggests that is the active ingredient in aspirin tablets). In other words, aspirin is alcohol may be cardioprotective. What is your recommendation an acidic substance, and it is cardioprotective, but these facts are regarding alcohol consumption, atrial fibrillation, and heart health? likely “true, true, and unrelated.” ANSWER: A very good topic. For the person who sent this question in, I hope you won’t mind my However, your question touches shortening it up and re-wording it a little. on a very cutting-edge new For many years, the body of evidence field regarding cardioprotection: suggested some heath benefit for what is the role of the gut moderate alcohol consumption microbiome in cardiovascular 2 health? Our intestines (defined as not more than one drink normally contain millions of per day for women and two drinks bacteria, including some 1,000 distinct species. These per day for men), particularly with intestinal bacteria, the “gut microbiome,” are now believed to play regard an important role in cardiovascular health, presumably by producing However, new research has tempered this view, and most medical to protection against heart attack. certain chemicals and nutrients that we need for cardioprotection. authorities are now much more cautious about recommending alcohol to improve heart health. The Cleveland Clinic website says: Experiments in mice have shown that if you eliminate these bacteria, the mice become sickly, and often develop cardiovascular “The effect of alcohol on your heart is complex. For some people, even disease. Many of my patients take a “probiotic,” which is basically a moderate alcohol use carries major risks. Research is ongoing to clarify collection of normal intestinal bacteria, to replenish and strengthen the relationship of alcohol and heart disease. You may have heard their own gut microbiome. It may turn out that certain foods or that moderate alcohol consumption (red wine or beer) may offer some balance of foods in the diet are needed to maintain a healthy gut people protection against heart disease. However, until more is known microbiome. Also, this is another reason not to take antibiotics about the pros and cons of alcohol consumption, the American Heart unless absolutely necessary, so as not to kill off the “good bacteria” Association cautions people NOT to start drinking alcohol for better in your intestines. To read more about probiotics and the gut heart health.” microbiome, look at https://en.wikipedia.org/wiki/Probiotic. YourHealthyHeart 20170124.indd 2 1/24/17 2:11 PM The Mayo Clinic website says: “alcoholic cardiomyopathy.” This is a condition that develops in heavy drinkers, usually after many years of alcohol excess (more “It sounds like a mixed message: Drinking alcohol may offer some than three drinks per day), and results from the toxic effects of health benefits, especially for your heart. On the other hand, too alcohol on heart muscle. The damaged heart muscle is weakened much alcohol may increase your risk of health problems and damage your heart. When it comes to alcohol, the key is moderation. Certainly, you don’t have to drink any alcohol, and if you currently don’t and the heart’s pumping function is impaired, leading to heart failure. In many cases, alcoholic cardiomyopathy improves dramatically with abstinence from alcohol. drink, don’t start drinking for the possible health BOTTOM LINE: If you don’t drink alcohol, benefits. In some cases, it’s safest to avoid don’t start; there are many more effective ways to alcohol entirely – the possible benefits don’t outweigh the risks.” improve your heart’s health. However, moderate alcohol consumption (one drink per day for women and two for men) is safe for most people. If you have a special situation (e.g., AF, I find myself in agreement with both of these cardiomyopathy or heart failure), check with your doctor as to how quotes. My biggest specific concern is the much (if any) alcohol is safe for you. relation between alcohol consumption and atrial fibrillation (AF). It is well known A PATIENT ASKS: What is the difference between normal that some individuals will be in good and abnormal heartbeats, what brings on the abnormal health until they go on vacation (or on a heartbeats, and when should we be concerned? business trip, or to a social event such as the Bohemian Grove), drink alcohol in excess of their usual consumption, and develop AF. This abnormal heart rhythm 3 ANSWER: Important questions, and ones that I am asked frequently. First, the normal heartbeat is a mechanical contraction of the heart, initiated by an electrical impulse causes rapid irregular pounding or racing of the heart, and is often generated within the heart itself. The heart has two upper associated with shortness of breath, light-headedness, or even loss chambers, the right and left atria, and two lower chambers, the of consciousness. When occurring sporadically in this setting, it is right and left ventricles. The ventricles are much more muscular sometimes called “Holiday Heart”. than the atria, and it is their job to pump blood around the body. When you listen to the heart with a stethoscope, or simply by I generally advise my patients with AF not to drink more than one pressing your ear to someone’s chest, it is the beating of the alcoholic beverage daily. The big danger of AF, of course, is that ventricles that you are hearing. it can lead to a stroke, by the mechanism of blood clots forming in the fibrillating atria, and then breaking off and traveling in the The normal heartbeat is initiated by an electrical impulse bloodstream to the brain. There are also other types of heart generated approximately once per second (60 times per minute) in problems that can result from alcohol, especially something called an area of the right atrium called the sinus node. For this reason, continue to page 10 YourHealthyHeart 20170124.indd 3 1/24/17 2:11 PM a As we begin the new year, perhaps even more so than ever, for many of us there is a deep sense of significant change and a profound feeling of transition across many spheres of our civic and personal lives. Such marked change may, for some of us, raise questions of where can we turn for reliable, verifiable sources of information that we can trust regarding matters that we care about deeply, such as our own health and the health of our loved ones. In this spirit it is unequivocally our goal with this publication to provide our readers with a consistent, reliable resource that is credible and, we hope, enjoyable to read. This semi-annual newsletter always includes my responses to prevention questions from our readers based on my decades of clinical experiences as well as my review and consideration of diverse medical perspectives from other leading clinicians on a myriad of subjects ranging from exercise, to nutrition, to treatment therapies. My hope is that somewhere, in each edition of YourHealthyHeart, you may find an idea, a tip, a publication reference or an opinion piece that inspires you to conduct further research or formulate a question for your next visit with your physician as part of an ongoing open dialogue with him or her, and with all of your medical providers. For example, diet is always an important component of cardiovascular health. In this issue, the role fresh fruit can play in a balanced diet is addressed in two features, first in an article by our Prevention Fellow, Philip Hall, MD (Page 6) and next, in one of our regular sections, Research In The News (Page 8). At our Prevention Center, while our core mission is to help people reduce their risks for cardiovascular disease, sometimes we also spotlight other important health topics. In this issue, we are pleased to include a summary of a pair of excellent presentations on brain 4 function, memory and dementia. These talks were given by two global leaders in neurology and neuro-science: Adam Gazzaley, MD and Bruce Miller, MD, both faculty members of the UCSF Department of Neurology (Page 11). We hope you’ll enjoy our synopses and that you’ll consider viewing the videos online of both talks at: http://healthyheart.ucsf.edu/resources-videolectures.shtml Whether addressing cardiovascular disease prevention or exploring other important health issues, we strive to present information based on validated research, years of clinical experience, or both. Our goal is always to engage your interest and inspire you to sustain and expand your own pursuit of relevant healthcare information to support yourself and those you love. Please let us know how we’re doing by emailing us your feedback at: [email protected]. Also please visit our program website at http://www.healthyheart.ucsf.edu for information about our work. Again, I’d like to express my most sincere thanks for your continued support of the Center for Prevention, the UCSF Medical Center, the Department of Medicine and the Division of Cardiology. Best wishes for good health, H William Grossman, MD Charles and Helen Schwab Endowed Chair in Preventive Cardiology Director, Center for Prevention of Heart & Vascular Disease Professor of Medicine, University of California, San Francisco YourHealthyHeart 20170124-aaps.indd 4 1/30/17 10:27 AM Join the and make a difference in heart disease today! 1 in 3 adults have heart disease. We need your help. University of California San Francisco (UCSF) is 5 pushing the boundaries of research with a new study about cardiovascular health. The Health eHeart Study uses online surveys, mobile technology, and social media as tools to help us understand how real-life health patterns are linked to our heart health. You must be 18 years or older to join. Health-eHeartStudy.org YourHealthyHeart 20170124.indd 5 1/24/17 2:11 PM So what exactly is a Heart-Healthy Diet? Cardiology Prevention Fellow reviews research, controversies and considerations regarding dietary choices and heart health By Philip Hall, MD Some of the most common questions we hear from patients and their family members at the Cardiovascular Care and Prevention Center are about diet and nutrition. “What foods should I be eating?” And, just as frequently, “What foods do I need to avoid?” These are deceptively challenging questions for us, because the scientific evidence is often not as clear as we would like it to be. Some commonly-held beliefs about healthy diets have not been supported by rigorous scientific studies. A low fat diet, for instance, we used to think was essential for heart health, based on the premise that consuming less fat leads to lower levels of cholesterol, which then should lead to a reduction in heart disease and stroke. Unfortunately, several large randomized clinical trials of implementing a low fat diet including the Women’s Health Initiative study of 48,835 patients reported by Barbara Howard and others in 2006 - have not shown a significant benefit in reducing heart disease or stroke despite successfully lowering fat consumption. Ramon Estruch and others reported the results of the PREDIMED Why wasn’t the low fat diet successful? One of the problems may be that when we ask patients to reduce their fat intake, many replace the fat 6 in their daily diet with other unhealthy nutrients, such as refined sugars and carbohydrates. The health benefits of cutting out the fat may be outweighed by the problems resulting from the extra carbohydrates. That’s one of the reasons why physicians have been moving towards placing just as much emphasis food groups to on recommending specific include in a healthy diet as on recommending foods to avoid. Scientific studies of implementing diet recommendations like these have generally been more successful than the studies of low fat diets. study in 2013, a randomized trial of the Mediterranean diet, which includes higher consumption of olive oil, fish, fruits and vegetables, nuts, and legumes, as well as a lower consumption of dairy products, red meat, processed meats, and sweets. In their study of 7,447 people, the Mediterranean diet was associated with a significant 30% reduction in heart disease or stroke. Based upon the best available scientific evidence, the American Heart Association (AHA) has developed dietary targets for food groups to include in a healthy diet (fruits and vegetables, fish and shellfish, whole grains, nuts, seeds, and legumes), and foods to limit (sodium, sugar-sweetened beverages, processed meats, and saturated fat). See the Table for details, and visit www.heart.org/nutrition for more information. These recommendations represent a diet that is very different from the average American diet, and the AHA estimates that fewer than 5% of U.S. adults are currently meeting all of the targets. Fortunately, our average diet has been improving over the past decade, in large part due to an increase in our consumption of whole grains and a decrease in sugar-sweetened beverages. Unfortunately, there is still a lot we do not know. On the Table you won’t find milk, butter, eggs, cheese, white meats, red meats, coffee, dark chocolate, or red wine, all of which you may have heard discussed in the news as being either healthy or harmful (or in some cases both!). The AHA has concluded the evidence for any of those foods is not yet definitive enough to make a recommendation one Philip Hall, MD YourHealthyHeart 20170124.indd 6 way or the other. Why not? Well in some cases there is conflicting 1/24/17 2:11 PM evidence, and in other cases it is hard to confirm the true effect of barriers to choosing healthy diet options is essential when trying the food itself. If, in one study, it looks like people who consume to make durable changes that will lead to long-term health gains. dark chocolate have less heart disease than people who don’t, it Finally, a heart-healthy diet is important, but it is only one of may well be because dark chocolate truly prevents heart disease, the seven factors the AHA identifies as components of ideal but it may also be because people who consume dark chocolate cardiovascular health. The other six factors include healthy tend to exercise more than people who don’t, or they smoke weight, physical activity, blood pressure, smoking avoidance cigarettes less often, or they have different genetic backgrounds that or cessation, cholesterol, and blood glucose. A healthy diet make them less likely to develop heart disease, or are fundamentally is intimately connected to the other six factors, and should be different in some other way. Teasing out whether dark chocolate is considered in that context. We are always eager to discuss these actually protective in and of itself is challenging. issues further in our clinic visits. So how can we respond to our patients’ questions? The AHA targets With that, I wish all of you a happy and healthy 2017! are a good start to the discussion, but our answers frequently References: (1-4) need to be personalized and individualized. Some patients have conditions requiring different dietary recommendations from others, and please talk with your physician about what diet is best for you. That said, nobody’s diet is perfect, and we can all try to identify cardiovascular disease with a Mediterranean diet. The New England journal of mediåcine 2013;368:1279-90. 2. Howard BV, Van Horn L, Hsia J et al. Low-fat dietary pattern and risk ways to improve our own. Choosing lower sodium alternatives, of cardiovascular disease: the Women’s Health Initiative Randomized replacing processed carbohydrates with whole grains, cutting down on sodas and sugary juices, and incorporating fruits and vegetables are all generally good and healthy options. They’re not always easy options, and doctors understand that less healthful diet choices Controlled Dietary Modification Trial. Jama 2006;295:655-66. 3. Mozaffarian D. Dietary and Policy Priorities for Cardiovascular 7 Disease, Diabetes, and Obesity: A Comprehensive Review. Circulation 2016;133:187-225. 4. Writing Group M, Mozaffarian D, Benjamin EJ et al. Heart Disease are not evidence of moral failings – instead they’re usually driven by taste, cost, and/or convenience. Identifying and recognizing the Food groups 1. Estruch R, Ros E, Salas-Salvado J et al. Primary prevention of and Stroke Statistics-2016 Update: A Report From the American Heart Association. Circulation 2016;133:e38-360. AHA Recommended Target Primary recommendations (best evidence) Fruits and vegetables ≥4.5 cups per day Fish and shellfish ≥2 3.5-oz servings per week (≥200g per week) Sodium ≤1500 mg per day Sugar-sweetened beverages ≤36 fl oz per week Whole grains ≥3 1-oz servings per day Secondary recommendations (good evidence) Nuts, seeds, and legumes ≥4 servings per week (nuts/seeds: 1 oz; legumes: ½ cup) Processed meats ≤2 1.75-oz servings per week (≤100 g per week) Saturated fat ≤7% of daily energy intake (calories) YourHealthyHeart 20170124.indd 7 1/24/17 2:11 PM Research In The News Commentary from Dr. Grossman on selected media coverage of medical research DO YOU NEED TO BE FASTING BEFORE HAVING YOUR CHOLESTEROL BLOOD TEST? Some of you may have seen news reports in the last few months on the new guidelines regarding the need to be fasting when you go for your cholesterol blood tests. Dr. Samia Mora from the Division of Preventive Cardiology at Harvard Medical School and the Brigham and Women’s Hospital in Boston has summarized these new guidelines in an article in JAMA Internal Medicine in July 2016. For many years it has been believed that eating right before having your cholesterol measured could falsely elevate the blood cholesterol, and give a distorted picture of the risk of heart attack or stroke. However, several studies in recent years suggest that bloods drawn in either the fasting or non-fasting state show remarkably little variability, particularly in the HDL and LDL cholesterol values, which are the main ones of interest to me and most cardiologists. Even the triglyceride level, which is most 8 likely to be affected by a recent meal, will rarely be pushed into the abnormal range. Most importantly, non-fasting measurement of cholesterol values was at least as good, and in some cases better than fasting values in predicting the risk of heart attack or stroke. BOTTOM LINE: According to the new guidelines, It is not necessary to be fasting prior to having a blood test for lipids (cholesterol profile). Just make sure to tell your doctor whether you were fasting or not, to help him or her interpret the tests. I agree wholeheartedly with these guidelines, and I think it will make life easier for all of us. YourHealthyHeart 20170124.indd 8 1/24/17 2:12 PM FRESH FRUIT CONSUMPTION: In the April 7, 2016 issue of the New England Journal of Medicine, a major study from China was published on the effects of fresh fruit in the diet on cardiovascular health. Between 2004 and 2008, the research team there recruited 512,891 adults who were 30-79 years of age, and followed them through September 2014. By questionnaire, participants were divided into five groups according to the frequency of fresh fruit consumption: never or rarely, monthly, 1-3 days per week, 4-6 days per week, and daily. Blood pressure and blood glucose (blood sugar) were inversely related to fruit consumption, and were lowest in the individuals with daily consumption of fresh fruit. As might be expected, the hazard ratios (risk compared with those who consumed no fruit) for heart attack, stroke and cardiovascular death were progressively lower with increasing consumption of fresh fruit. In those with daily fruit consumption, the risk of stroke was 25-35% lower, and the risk of heart attack was nearly 40% lower. BOTTOM LINE: I have fruit for breakfast every morning 9 (strawberries and bananas in my cereal), and my standard dessert after supper is a bowl of grapes, sliced banana, blueberries, kiwi, apple, pear, Asian pear, etc. I strongly recommend a high fruit intake for all who want to avoid stroke or heart attack, and who have a tendency to diabetes. Although this study was done in China, similar data have been published from Europe and the United States. YourHealthyHeart 20170124.indd 9 1/24/17 2:12 PM Ask Dr. Grossman continued from page 3 Dr. Grossman’s responses to patient questions normal heart rhythm is called “normal sinus rhythm.” This impulse all of these conditions are reversible, at least to some extent. I spreads through the atria, causing them to contract, and then have had many patients who have been able to get off medication spreads down to the ventricles, causing them to contract. for hypertension and diabetes, and reduce or even eliminate their cholesterol medications, if they had success with their weight loss In most of us, there are other areas of the heart (in the atria, the programs. Many programs work: for some, it is simply reducing or ventricles, or the area between the atria and ventricles, called the completely eliminating foods with sugar, as well as all breads, pasta atrioventricular node) that are capable of generating an electrical and potatoes. For others, a structured program such as Food Addicts impulse and causing the whole sequence that leads to contraction of Anonymous, Overeaters Anonymous, or even Weight Watchers or the ventricles and a heartbeat. Simply put, if the heartbeat is initiated Jenny Craig-type programs can be effective. If none of this works, by the sinus node in the right atrium, it is called a normal heartbeat. and if the overweight becomes significant obesity (Body Mass Index If it is initiated from any place else, it is often called an “ectopic” or BMI of over 35), I recommend considering bariatric surgery. This or “extra” beat. Almost everyone has at least some ectopic beats, can work miracles, and is the only therapy that I have seen which can and when we do a Heart Monitor test (either the old Holter Monitor, actually cure adult-onset (so-called type 2) diabetes. or the newer 14-day Zio monitor), it is rare not to see at least a few 10 ectopic beats (“a few” might be defined as less than 1% of the total BOTTOM LINE: As Sam sang to Humphrey Bogart and Ingrid beats). Since everyone has them, it is hard to call them “abnormal.” Bergman in Casablanca, “The fundamentals still apply, as time goes Certainly for most people they are benign, and pose no danger. by.” If you are overweight and have an enlarged heart or other heart problem, diet, exercise and weight loss have not gone out of style! Ectopic or extra beats are abnormal when they become more frequent, and especially if they lead to an arrhythmia (medical term for a heart rhythm disturbance), such as atrial fibrillation, prolonged supraventricular tachycardia (SVT), or ventricular tachycardia (VT). The definition of each of these arrhythmias is beyond the scope of this column. BOTTOM LINE: Suffice it to say, if you are having palpitations and sense that your heart is jumping around, skipping a beat, irregular, or racing without any explanation, see a cardiologist and get an EKG, and if needed, a Heart Monitor test. A PATIENT ASKS: I have been told that I have enlargement of the heart, likely related to being overweight and inactive. My question: is this reversible with losing weight, diet and exercise? ANSWER: Being inactive and overweight can lead to hypertension, arteriosclerosis and metabolic syndrome, and eventually to diabetes. All of these medical conditions can cause cardiac enlargement. The good news is that with diet, exercise and ESPECIALLY WEIGHT LOSS, YourHealthyHeart 20170124.indd 10 1/24/17 2:12 PM Cognition, Dementia and Video Games: A Special feature on Brain Health and Aging A recap of presentations by two renown UCSF neuroscientists on the effects of aging on our brains and current research and treatment strategies Cardiologists encourage patients to exercise, lose weight and engage Improve sleep: During deep sleep, the brain clears away bad their minds to prevent heart attack and stroke. It turns out these steps proteins that cause dementia. Poor sleep or medications that induce can also help prevent dementia, as UCSF neuroscientists Dr. Bruce false states of sleep are associated with higher risk of developing L. Miller and Dr. Adam Gazzaley discussed in a UCSF Center for cognitive disorders. UCSF recently recruited Dr. Andrew D. Krystal, a Prevention of Heart and Vascular Disease seminar entitled “Dementia in world expert on sleep disorders, who is developing better treatments. the Elderly: What’s New, and Is There Hope?” Address depression: “Some people say, ‘I don’t want to take an “It’s good to know that the advice I give my patients, ‘Use it or lose it,’ antidepressant, because it might do bad things to my brain,’” said Dr. may help stave off cognitive decline as well as cardiovascular disease,” Miller. “But untreated mood disorders are a very big risk for cognitive said Dr. William Grossman, the Center’s director and Charles and Helen decline, and it is far better to treat depression with medication.” Schwab Endowed Chair in Preventive Cardiology. Boosting Brain Function There are many forms of dementia, of which Alzheimer’s disease is the most common. Dementia occurs when “bad” proteins – tau or beta amyloid proteins – accumulate in the brain, kill neurons, and spread Besides preserving what we have, Dr. Gazzaley is developing new ways to increase cognitive skills. The brain is remarkably plastic, able to modify its own structure, chemistry and function in response to experience. Dr. Gazzaley’s laboratory has to other neurons. These proteins likely spent the last eight years developing video begin accumulating years before game technology to harness this plasticity to patients exhibit symptoms, providing an enhance cognition. For example, he partnered opportunity for treatment or even prevention. 11 with game designers to create NeuroRacer, in which players simultaneously drive and respond “We don’t have any cures, but this is the most exciting year I’ve seen in my field, and I believe we will have cures,” to road signs. Young adults multitasked better than older adults, but with 12 hours of practice, older said behavioral neurologist Dr. Miller, director of the UCSF Memory adults actually outperformed 20-year-olds who only played and Aging Center and A.W. and Mary Margaret Clausen Distinguished the game once. These older adults showed improvement in Professor in Neurology. “Most critical to cures is early intervention, and unrelated skills, such as the ability to remember faces and that’s why we focus so much on healthy aging.” complete tedious tasks. Dr. Miller outlined ways to reduce the chances of developing dementia, Dr. Gazzaley is excited about video games’ potential to including: Exercise: About one-third of dementias could likely be avoided through calibrate the difficulty level to each player’s sweet spot, so the game is challenging but not frustrating. “As you get better, the game gets a little harder,” said Dr. Gazzaley. “It’s like a personal lifestyle changes to prevent and treat diabetes, hypertension and trainer. It’s the ideal way to induce change: intervene, record impact, obesity. Dr. Miller recommends exercising 30 to 40 minutes, five days a and use that data to rapidly reformulate your intervention. It’s a very week. Exercise also stimulates production of brain-derived neurotrophic targeted experience that can selectively activate brain networks in a factor, which helps maintain memory. way that no drug has ever achieved.” Avoid head trauma: Although exercise is vital, sports such as football To watch these presentations online, please visit: or soccer carry increased risk of head trauma, which can contribute to http://tiny.ucsf.edu/healthyheart. dementia. Choose activities that carry a lower risk of concussion, such as tennis, swimming or walking. YourHealthyHeart 20170124.indd 11 This article reprinted with permission from Heartline, December 2016. 1/24/17 2:12 PM Non-Profit Org. US Postage PAID San Francisco, CA Permit No. 8285 Center for Heart and Vascular Disease Prevention 555 Mission Bay Boulevard South, UCSF Box 3120 San Francisco, CA 94158-9001 12 Heart Healthy Strategies Education Series These and other popular live lectures available online at: http://healthyheart.ucsf.edu/resources-videolectures.shtml Technology meets Neuroscience Dementia in the Elderly: Adam Gazzaley, MD, PhD Professor of Neurology, Physiology and Psychiatry, UCSF Bruce Miller, MD Director, UCSF Memory and Aging Center - A Vision of the Future of Brain Health for Older Adults What is New in Diagnosis and Treatment? Your Healthy Heart is published by the Center for Prevention of Heart and Vascular Disease at the University of California, San Francisco | www.healthyheart.ucsf.edu For mailing list corrections, additions, or to be removed from the list please send an email to [email protected] Contributors: William Grossman, MD; Philip Hall, MD Producer: Marc Vincent, MA Graphic Design: Niana Liu Photography: Niana Liu; iStock Photo (other photos) YourHealthyHeart 20170124.indd 12 1/24/17 2:12 PM