Heart Attacks are Preventable!

EP354: Metabolic Syndrome Meeting

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Episode Summary Introduction Dr. Warwick Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode to discuss cardiometabolic health—the intersection of heart disease, diabetes, fatty liver disease, and dementia. After addressing listener feedback about a previous episode on the nocebo effect, Dr. Bishop shares key insights from a cardiometabolic academy conference in Melbourne featuring presentations from leading experts in cardiology, lipids, nephrology, hepatology, and neurology. Key Takeaways: Type 1 and Type 2 diabetics carry essentially the same cardiovascular disease risk, contrary to the common assumption that Type 2 diabetics face greater risk. SGLT2 inhibitors (empagliflozin) and GLP-1 agonists (semaglutide/Ozempic) reduce cardiovascular events independently of their effects on glucose control and weight loss, suggesting distinct hormonal mechanisms at play. Prescribers must inform patients starting on SGLT2 inhibitors about rare but serious risks including diabetic ketoacidosis and Fournier's gangrene. Multiple weight loss medications are now available in Australia, with emerging agents like bimagrumab showing promise for weight loss without corresponding muscle mass loss. GLP-1 receptor agonists have receptors throughout the body (pancreas, heart, kidney, brain, stomach, liver), explaining their broad therapeutic effects beyond glucose management. Approximately 50% of people classified as "metabolically healthy overweight" develop diabetes within 10-15 years, challenging the concept of healthy obesity. Fatty liver disease affects roughly one in three people and serves as an early indicator of cardiometabolic disease progression, with early intervention through diet, exercise, and medication potentially preventing serious outcomes. Imaging advances now allow detection of inflammation in arteries and surrounding perivascular fat, which correlates with increased future cardiovascular event risk. GLP-1 agents may help reduce dementia progression by offsetting shared risk factors between Alzheimer's disease and vascular dementia. Read more

EP353: 6 Tips For Bone Health

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Dr. Eric Bishop is a cardiologist, author, keynote speaker, and CEO of the Healthy Heart Network who is passionate about helping people live well for as long as possible. In this episode, he discusses osteoporosis prevention and bone health as we age, drawing on insights from a Lifeforce guide and sharing his personal interest in the topic through his OsteoStrong franchise. The episode focuses on six practical strategies for maintaining strong bones and muscle strength throughout life. Key Takeaways: Get enough calcium, vitamin D, and vitamin K2, which are essential building blocks for bone formation, similar to ingredients needed for baking a cake. Resistance and weight training are critical for stimulating bone growth and maintaining muscle strength, with OsteoStrong being an efficient method requiring only one visit per week. Limit processed foods and opt for whole foods without barcodes, as studies show processed meats, pastries, and pizza are linked to lower bone mineral density. Reduce alcohol consumption as it interferes with vitamin D metabolism and calcium absorption, and increases the risk of metabolic syndrome. Ensure adequate protein intake (approximately 2 grams per kilogram of body weight daily), as amino acids and proteins like collagen are essential for building and maintaining both bone and muscle as we age. Quit smoking, as cigarette smoke is detrimental not only to overall health but specifically damages bone health. Recognize that protein requirements increase with age due to reduced production, absorption, and exercise capacity, making protein supplements a sensible consideration for many older adults. Understand that bone and muscle loss are linked to frailty and poor long-term health outcomes, making prevention through proper nutrition and exercise a priority. Read more

EP352: Longevity Lounge with Doctor Warrick Bishop

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Dr. Warwick Bishop, a renowned Australian cardiologist, best-selling author, and preventative medicine specialist, joins hosts Carl Treach and Guy Leach on the Longevity Lounge to discuss heart disease prevention. Dr. Bishop is the CEO of the Healthy Heart Network and is passionate about helping people understand how to live well for as long as possible, emphasizing that most heart attacks in Australia could be prevented with proper knowledge and screening. This highly anticipated episode focuses on preventative cardiology and actionable steps listeners can take to avoid future health crises. Key Takeaways: One in four Australians die from heart disease, and 20% of all heart attacks occur in people 65 years of age or younger, making early screening critical regardless of fitness level A reactive "tow truck mentality" to health is insufficient; preventative screening through advanced cardiac imaging like CT scans can identify hidden plaque buildup before a life-threatening event occurs Forty percent of all heart attacks occur in arteries that are not narrowed until plaque ruptures and forms a clot, meaning stress tests and feeling fine are not reliable indicators of cardiac health Men should ideally be screened for heart disease at age 50 and women at age 60, but those with risk factors like elevated cholesterol, pre-diabetes, or bad family history should be screened starting at age 40 and 50 respectively Even highly trained athletes and elite endurance competitors are not immune to heart disease; Emma Carney and Greg Welch are examples of world triathlon champions who required pacemakers despite peak fitness levels Atrial fibrillation can be linked to excessive endurance athletic training, as intense exercise can trigger inflammation that paradoxically increases arrhythmia risk despite exercise's overall anti-inflammatory benefits Cardiac CT imaging technology has advanced significantly since the early 2000s, allowing doctors to "lift the bonnet" and visualize the heart in detail to detect problems before symptoms appear A pivotal moment for Dr. Bishop came when he resuscitated a 53-year-old runner who had collapsed during a fun run, only to discover he had examined the same patient 18 months prior—prompting his shift toward preventative cardiology Read more

EP351: Talking Heart and Aging With Dr Luong Part 2

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction: Warwick Bishop hosts Dr. Rebecca Loong, a qualified dietitian with a PhD in cardiometabolic health and accredited sports dietitian, for the second episode of their discussion series. This episode focuses on macronutrients—specifically fats and protein—and their role in promoting healthy aging, building on their previous conversation about carbohydrates and insulin in heart-healthy diets. Key Takeaways: Frailty and cardiovascular disease are closely interrelated, with frailty increasing the risk of major adverse cardiovascular events by 2-5 times and the risk of developing cardiovascular disease by about 2 times. A dietary pattern rich in vegetables, legumes, and seafood is associated with reduced prevalence of frailty across multiple research studies, both observational and longitudinal analyses. Older adults require higher protein intake than previously recommended, with current evidence suggesting 1.2 to 1.6 grams of protein per kilogram of body weight, compared to the older guideline of 0.9 grams per kilogram. Approximately 100 grams of cooked protein sources (fish, chicken, or beef) provides roughly 30 grams of protein, and protein intake should be distributed throughout the day across multiple meals rather than concentrated in one sitting. Protein comes from diverse food sources including meat alternatives, legumes, fish, nuts, seeds, eggs, and dairy products, making it easier to meet daily targets by incorporating protein at breakfast, lunch, and dinner. Whole foods are generally preferable to protein supplements because they provide additional vitamins and minerals alongside protein, though supplements can be useful when whole food intake is inadequate. Dairy consumption is particularly important for older adults, with recommended servings increasing from 2.5 serves to 3.5-4 serves daily to support both protein intake and calcium needs for bone health. Using practical tools like the fist measurement method or free apps like "Easy Diet Diary" can help people understand portion sizes and track protein intake without requiring long-term food tracking. Read more

EP350: Talking Heart and Aging With Dr Luong Part 1

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Dr. Warrick Bishop welcomes Dr. Rebecca Long, an accredited practicing dietitian specializing in sports nutrition and cardiometabolic health, and co-founder of Heartful Flavours. The episode explores Rebecca's career journey into dietetics and focuses on dietary strategies for managing cardiometabolic health, particularly through carbohydrate control and whole dietary pattern approaches. Key Takeaways: Rebecca's path to dietetics was driven by a lifelong love of food combined with firsthand observations of the importance of health management during her work as a medical receptionist while studying food science. Cardiometabolic health is a term coined in 1999 that encompasses interconnected risk factors including blood pressure, blood glucose levels, cholesterol, and central adiposity that collectively predict heart disease and diabetes risk. Modern nutrition research emphasizes analyzing complete dietary patterns rather than single nutrients, as the synergistic effects of combined foods and nutrients provide a more accurate understanding of health impacts. For pre-diabetic and high blood sugar patients, carbohydrate control (not elimination) is recommended, with typical targets of 30-45 grams per meal at breakfast, lunch, and dinner, with testing two hours after meals to monitor blood sugar response. Glycemic index distinctions matter: low glycemic index foods like basmati rice raise blood sugar more slowly with lower peaks, providing sustained energy, while high glycemic index foods cause rapid spikes and drops in blood sugar. Whole grains are universally recommended across healthy dietary patterns over refined grains, and processed foods high in sugar should be limited as part of overall cardiometabolic management. The discussion will continue in a follow-up episode focusing on protein and fat intake in the context of frailty and heart health, emphasizing that carbohydrate reduction is one component of a broader healthy dietary pattern approach. Read more

EP349: Climate and Environment with Dr Fiona Foo Part 2

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Host Warwick Bishop welcomes back Dr. Fiona Fu, a general and interventional cardiologist specializing in women's cardiovascular health, sports cardiology, and the intersection of climate change with cardiovascular disease. This is the second episode in a series exploring environmental factors affecting heart health, building on their previous discussion about air pollution and expanding to cover traffic-related emissions and extreme weather impacts on cardiovascular systems. Key Takeaways: Traffic-related air pollution in Australia contributes to over 11,000 deaths annually and more than 12,000 cardiovascular disease hospitalizations, making it a significant public health crisis. Traffic emissions represent approximately 10% of Australia's total emissions and are the fastest-growing source, requiring urgent mitigation strategies. The "idle-off" initiative encourages drivers to turn off engines when stopped, particularly in school zones where children with developing lungs are most vulnerable to pollution exposure. Active transport options—walking, cycling, and public transportation—reduce both cardiovascular disease risk and emissions while providing incidental health benefits through increased physical activity. Diesel vehicles and larger vehicles produce more toxic emissions and ultrafine particles that penetrate deeper into the lungs than standard PM 2.5 particles. Extreme heat is the leading cause of death from natural disasters in Australia and significantly increases risk of heart attacks, strokes, heart failure, and arrhythmias. Heat and humidity combined create synergistic effects on cardiovascular mortality, with the combined impact greater than each factor independently. Vulnerable populations include elderly and young people, pregnant women, those with chronic diseases, low-income individuals lacking air conditioning, outdoor workers, and athletes, though heat-related illness can affect anyone regardless of age. Proper hydration (at least 2 liters daily, more in heat) and electrolyte replacement are essential for protection against heat-related cardiovascular events, particularly for athletes. Extreme heat combined with bushfires in Australian summers creates compounded cardiovascular health risks through synergistic effects on disease mortality and hospitalizations. Read more

EP348: Climate and Environment with Dr Fiona Foo Part 1

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Episode Summary Dr. Warwick Bishop hosts Dr. Fiona Foo, a Sydney-based interventional cardiologist with expertise in women's heart disease and sports cardiology, to discuss the critical intersection of climate, environment, and cardiovascular health. In this first part of a two-part series, they explore how environmental factors—particularly air pollution—represent a major modifiable risk factor for heart disease worldwide, one that many people fail to recognize or act upon. Key Takeaways: Environmental factors, including air pollution, are the fourth highest modifiable risk factor for cardiovascular disease globally—ranking higher than smoking—alongside behavioral and metabolic risk factors. Air pollution causes approximately 6.7 to 8 million deaths annually worldwide, with over 50% of these deaths attributed to cardiovascular disease, including heart attacks and strokes. PM2.5 particulate matter (2.5 microns in diameter) from fossil fuel burning, forest fires, and traffic exhaust is so small it can penetrate the lungs, enter the bloodstream, and damage every organ in the body through inflammatory and oxidative pathways. More than 90% of the global population is exposed to annual PM2.5 levels exceeding WHO guidelines, and Australia is not immune despite perceptions otherwise—particularly during bushfire and back-burning seasons. Switching to renewable energy sources (solar, wind) and electrifying home systems previously powered by fossil fuels and gas is one of the most impactful personal actions to reduce air pollution while improving cardiovascular and respiratory health. During high air pollution events (bushfires), individuals should stay indoors, avoid outdoor exercise, use N95 masks if outside, install air filters, seal door gaps, and set car air conditioning to recirculation mode rather than drawing in outside air. Domestic gas stoves and oil/gas production facilities release multiple pollutants (methane, ozone, nitrogen oxide) beyond PM2.5 that significantly increase asthma, respiratory illness, and cardiovascular disease risk, particularly affecting vulnerable populations. Climate change is intensifying both air pollution exposure and extreme weather events (heat and cold), creating compounding cardiovascular and broader health risks that require both individual action and systemic policy changes. Read more

EP347: What Do You Know About Your Appendix?

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Episode Summary: What Do You Know About Your Appendix? Dr. Warwick Bishop, a physician and podcaster, explores the emerging medical perspective on the appendix in this episode. Drawing from recent medical literature, Bishop challenges the traditional view of the appendix as a useless vestigial organ and discusses new research suggesting it plays important roles in gut health and immune function. The episode examines whether preserving the appendix through antibiotic treatment, rather than surgical removal, might be beneficial for long-term health. Key Takeaways: The appendix may not be useless as previously thought; it could serve as a "safe house" that stores beneficial gut bacteria and helps restore the microbiome after infections like salmonella. Antibiotic therapy is emerging as a viable alternative to appendectomy (surgical removal) for uncomplicated appendicitis, raising questions about whether routine surgical removal is always necessary. People who have undergone appendectomy show more than double the risk of serious non-typhoidal salmonella infections requiring hospitalization, suggesting a protective role of the intact appendix. Removal of the appendix is linked to increased risk of irritable bowel syndrome, type 2 diabetes, lupus, and potentially colorectal cancer and Parkinson's disease. The appendix contains special M cells that detect invasive bacteria and viruses, suggesting it functions as a training ground for the immune system. Comparative anatomy studies show the appendix has undergone at least 29 evolutionary changes across mammalian species, indicating it likely has adaptive functions rather than being merely vestigial. Research on zoo animals demonstrated that species with an appendix lived longer and experienced less diarrhea than those without, supporting a protective health function. Before automatically removing an appendix during treatment with antibiotics, consideration should be given to whether the antibiotics themselves might harm the beneficial bacterial reservoir the appendix maintains. Read more

EP346: Cholesterol and Statin Non-Believers

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Dr. Warwick Bishop, a cardiologist, author, keynote speaker, and CEO of the Healthy Heart Network, hosts this episode to address common misconceptions and skepticism surrounding cholesterol and statin therapy. With heart disease claiming a life every 20 minutes in Australia, Dr. Bishop discusses myths held by "cholesterol and statin non-believers" that could prevent people from receiving beneficial treatment. The episode aims to clarify the science behind cholesterol management and cardiovascular health. Key Takeaways: Cholesterol itself is essential for body functions like vitamin transport, bile acid production, and cell membranes, but becomes problematic when it accumulates in arteries as part of atherosclerosis. While high blood cholesterol levels alone don't perfectly predict who has arterial plaque, for people with identified plaque or previous cardiac events, lowering cholesterol is unquestionably beneficial and well-supported by scientific evidence. Saturated fats increase LDL cholesterol levels, which can be problematic for people with existing arterial plaque; more research is needed on whether dietary approaches like ketogenic diets can offset saturated fat risks through inflammation reduction. Cholesterol is necessary for hormone production, but the body can function adequately with very low blood cholesterol levels since cells synthesize 80% of the cholesterol they need internally rather than relying on dietary sources. LDL particle size is likely an indicator of other metabolic problems like insulin resistance and inflammation rather than the primary driver of atherosclerosis, making the overall metabolic picture more important than particle size alone. Statins cause significant harm only when prescribed to low-risk individuals without evidence of arterial disease; for high-risk patients with documented plaque, the risk-benefit equation strongly favors statin therapy. Statin side effects are likely overreported rather than underreported, with studies showing that 75% of people reporting statin side effects can successfully take the medication when evaluated in double-blind trials, indicating a substantial nocebo effect. For patients with significant coronary artery disease, every millimole reduction in cholesterol produces a 20% relative risk reduction in recurrent cardiac events—a substantial and well-documented benefit. The distinction between how cholesterol enters arterial walls (from inside-out versus outside-in via small blood vessels called the vasa vasorum) doesn't change the clinical reality that lowering cholesterol reduces risk in high-risk patients. Inflammation is important in atherosclerosis development, but it is not the sole explanation; cholesterol plays a healing response role in inflammatory sites, making the process more complex than inflammation alone. Read more

EP345: 5 Highlights From PD 2024

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. EP345: 5 Highlights From PD 2024 Dr. Auric Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode featuring Dr. Warwick Bishop discussing key highlights from the 2024 Port Douglas Heart Meeting and Expo. The episode focuses on five major clinical advances and topics presented on day one of this prestigious international cardiology conference, which brings together leading experts from renowned institutions like the Mayo Clinic to share practical, clinically-guided teaching relevant to everyday cardiology practice. Key Takeaways: Angiovac technology represents an innovative intervention for bacterial endocarditis, functioning like a "vacuum cleaner" that uses ultrasound guidance to remove bacterial vegetations from heart valves, thereby reducing infective load and preventing dangerous complications like stroke or kidney infarction. Current evidence suggests earlier surgical intervention for aortic stenosis and mitral regurgitation may be beneficial, as delaying surgery while the heart remains under strain can lead to irreversible fibrosis and scarring of the ventricle, compromising surgical outcomes even after valve replacement. High-risk pregnancy categories for cardiac patients include women with elevated pulmonary pressures, reduced left ventricular function, severe valve disease, severe aortic dilatation (associated with Marfan syndrome and Ehlers-Danlos syndrome), and peripartum cardiomyopathy, which requires pre-pregnancy risk assessment and counseling. The athlete's heart exhibits training-specific adaptations: endurance athletes develop enlarged hearts with greater stroke volume, while strength-trained athletes develop thickened, more powerful hearts, both representing normal responses to elite-level training stimuli. Strain technology, specifically longitudinal strain measurement, provides a sophisticated way to assess myocardial damage and guide optimal timing for mitral valve surgery before irreversible cardiac damage occurs. Percutaneous mitral valve correction using clips inserted through blood vessels offers a less invasive surgical alternative to traditional open-heart surgery for patients with inadequate mitral valve closure. Read more