Heart Attacks are Preventable!

EP244: Warfarin and Risks

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, and CEO of the Healthy Heart Network, hosts this episode dedicated to educating listeners about warfarin and its dangerous drug interactions. With heart disease claiming one life every 20 minutes in Australia and affecting over 9 million people globally, Dr. Bishop emphasizes that most cases are preventable through proper health literacy and understanding medications like warfarin that require careful management. Key Takeaways Warfarin is a blood-thinning medication originally developed as a rat poison in the 1950s and approved for human use by the FDA in the mid-1950s, remaining a critical anticoagulant for decades. Warfarin is still essential for patients with mechanical heart valves, as newer anticoagulants (Xarelto, Eliquis, Pradaxa) have not yet been proven as safe or effective for this specific application. Warfarin works by blocking vitamin K1, which is necessary for the liver to synthesize clotting factors (2, 7, 9, and 10) in the body's coagulation cascade. The drug is metabolized through the liver's P450 system, and many medications including antifungals and antibiotics can interfere with this system, causing warfarin to accumulate dangerously in the body. Warfarin dosing is carefully monitored using the INR (International Normalised Ratio) test, which measures how long blood takes to clot; the target is typically 2.5, meaning blood clots 2.5 times slower than normal. Warfarin interactions can cause INR levels to spike dangerously to 6, 7, 8 or higher, creating risk of spontaneous internal bleeding in the brain, gastrointestinal system, or urinary system—a medical emergency. Patients on warfarin must always inform their doctors about any new medications and ask specifically if they interact with warfarin before taking them. Maintaining a current list of all medications and carrying it with you is essential for quality medical care and preventing dangerous drug interactions. Read more

EP243: Is There a Best Time to Exercise?

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: EP243: Is There a Best Time to Exercise? Dr. Warwick Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode featuring Dr. Eric Bishop discussing research on optimal exercise timing. The episode explores a 12-week cardiovascular fitness study that unexpectedly discovered sex-based differences in how the human body responds to exercise performed at different times of day. The discussion aims to help listeners maximize their fitness results by aligning their exercise routines with their biological responses. Key Takeaways: Women who exercised in the morning showed greater fat loss and muscle gain compared to women who exercised later in the day, though the differences were modest. Men showed no significant difference in fat loss or muscle gain whether they exercised in the morning or evening. Men who exercised in the evening experienced better blood pressure reduction compared to morning exercise. Men who exercised in the evening showed improved cholesterol levels and reported less fatigue than those exercising at other times. Exercising at the same time each day helps regulate circadian rhythm and improves sleep quality. Combining exercise with sun exposure enhances circadian rhythm regulation by influencing melatonin production from the pineal gland, further improving sleep quality. Any consistent exercise routine is beneficial; the key is establishing a regular habit rather than sporadic activity. Women seeking to maximize fat loss and muscle gain may benefit from morning exercise sessions. Men aiming to improve cardiovascular markers (blood pressure and cholesterol) and energy levels may benefit from afternoon or early evening exercise. Read more

EP242: Hangry!

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: "EP242: Hangry!" Dr. Rick Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, explores the scientific reality of being "hangry"—the phenomenon where hunger triggers anger and irritability. Drawing on recent research and personal clinical experiences, Dr. Bishop examines whether the foods we consume influence the intensity of hangry episodes, particularly focusing on the role of carbohydrates and blood sugar stability in mood regulation. Key Takeaways: Hangry is now scientifically validated, with a 21-day study of 64 participants showing a 35% association between hunger and increased anger/irritability. The type of food consumed may significantly influence whether hunger leads to anger, with low-carbohydrate diets potentially preventing mood swings by stabilizing blood sugar levels. Dr. Bishop's personal experience with extended fasting (16-20 hours) on a reduced-carb diet shows minimal irritability, suggesting that stable insulin and glucose levels may buffer against hangry responses. A patient case study demonstrated that switching to a low-carbohydrate diet eliminated the patient's road rage, suggesting dietary changes can have profound effects on mood and emotional regulation. Black butter coffee and minimal food intake (cheese) can sustain focus and energy through extended periods without triggering irritability, challenging the assumption that hunger automatically causes anger. The existing hangry research may not account for dietary composition, leaving an important variable unexplored in understanding the full picture of hunger-related mood changes. Stable blood sugar levels appear to be key to maintaining emotional equilibrium during periods of restricted eating or fasting. Read more

EP241: A Refresher On Stress

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. EP241: A Refresher On Stress - Summary Dr. Warwick Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode focused on understanding stress, depression, and anxiety and their profound impact on cardiovascular and overall health. With heart disease claiming one life every 20 minutes in Australia and affecting over 9 million people globally, Dr. Bishop emphasizes that most of these cases could be preventable with proper health knowledge. This episode serves as a refresher on how chronic stress mechanisms work in the body and practical strategies to manage them. Key Takeaways: Depression and anxiety are strongly linked to increased risk of major cardiovascular events, with people suffering from these conditions experiencing worse cardiovascular outcomes. The body has two main stress response systems: the nervous system (sympathetic), which directly tightens blood vessels and increases heart rate, and the hormonal system, which releases adrenaline and cortisol. Chronic stress hormones (adrenaline and cortisol) lead to fluid retention, elevated blood pressure, insulin resistance, and inflammation when sustained over long periods. The human body was evolutionarily designed for short, acute stress responses (like a gazelle fleeing a predator for minutes), not prolonged stress lasting hours, days, or weeks as occurs in modern life. Modern lifestyle stressors—alarm clocks, traffic, work deadlines—keep the sympathetic nervous system continuously elevated, preventing the body from returning to its natural resting state. Chronic stress can impact gene expression through epigenetics, potentially contributing to abnormal cellular division and cancer formation by altering how DNA is converted into proteins. Exercise performed four to six times per week has been shown to be as effective as antidepressants in managing mood and rebalancing the body's energy system. Meditation and mindfulness practices can help reduce stress and anxiety, with the speaker noting personal benefits from recently embracing meditation. Most stress has negative long-term consequences that are difficult to predict, making stress management essential for long-term health. Awareness of your stress levels and consultation with loved ones about your wellbeing are important first steps in managing chronic stress effectively. Read more

EP240: 10 Second Test To Predict Mortality

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 Dr. Eric Bishop, a practicing cardiologist passionate about patient education and heart health, discusses a groundbreaking Brazilian study that reveals a simple 10-second balance test can predict mortality over seven years. The episode explores how this test serves as a surrogate marker for frailty and introduces OsteoStrong, a franchise system Dr. Bishop is launching to help people maintain strength, balance, and independence as they age. Key Takeaways: A simple 10-second single-leg balance test can predict seven-year mortality risk, with those unable to complete it facing a four-fold increase in death rates (17.5% vs. 4.5%). The study, conducted over 15-20 years with 1,700 participants (ages 51-75), found that approximately 50% of 70-year-olds cannot stand on one leg for 10 seconds. The test serves as a surrogate marker for frailty, measuring balance, flexibility, strength, and power—the key components that define aging and health decline. Mortality in those failing the test was from all-cause deaths, including both cardiovascular and cancer-related deaths, not just heart disease. Maintaining balance and strength directly impacts quality of life and independence, helping seniors avoid requiring nursing home care or assisted living. Traditional fitness approaches focus on cardiovascular health, but this research highlights the critical importance of strength and balance training for longevity. OsteoStrong uses specialized machines to improve strength, balance, and bone density in very short, regular workout sessions, functioning as an anti-frailty intervention. Osteoporosis and fractures are major causes of mortality and morbidity in aging populations, making bone strength training essential. Dr. Bishop's philosophy centers on helping people "live as well as possible for as long as possible" through preventive health measures. Read more

EP239: Thinking Risk Factors and Beyond

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 Dr. Warrick Bishop is a practicing cardiologist and passionate health educator who hosts this podcast to help patients understand their heart health through education. In this episode, Dr. Bishop explores often-overlooked cardiovascular risk factors beyond the standard ones like cholesterol, smoking, and blood pressure. He discusses emerging research and practical strategies for identifying and managing these hidden risks to prevent heart disease. Key Takeaways: Lipoprotein(a) is a dangerous cholesterol subfraction with a protein "tail" that increases inflammation and clot formation risk, disproportionately affecting those with early heart attacks and running in families. Testing for lipoprotein(a) currently costs $50-60 out-of-pocket, but Medicare rebates are expected within a few years as new therapeutic interventions targeting this risk factor become available. Inflammation plays a significant role in coronary artery disease, with major trials (JUPITER and CANTOS) demonstrating its impact, though lowering cholesterol remains the primary therapeutic strategy. Colchicine, a gout medication, has shown promise in clinical trials for reducing heart attack risk, representing a potentially affordable anti-inflammatory approach for cardiac patients. Obstructive sleep apnea drives inflammation, endothelial dysfunction, and sympathetic nervous system activation, leading to high blood pressure and atrial fibrillation. Sleep apnea can be initially screened through overnight oxygen saturation tests, and partners' observations about snoring and interrupted breathing are valuable diagnostic clues. Socioeconomic and environmental disparities significantly affect cardiovascular health outcomes, with disadvantaged populations having fewer resources to manage standard risk factors. Diet is rarely included in standard cardiovascular risk calculators despite strong evidence that extra virgin olive oil, nuts, and whole foods reduce heart disease risk. Processed meats, sugar, salt, and trans fats should be minimized, while grass-fed protein sources, fruits, vegetables, and nuts form the basis of a heart-healthy diet. Read more

EP238: Oh No, Blood Pressure Again!!!

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: Oh No, Blood Pressure Again!!! Dr. Warwick Bishop is a practicing cardiologist and passionate health educator who believes informed patients receive better care. In this episode, Dr. Bishop advocates passionately for prioritizing blood pressure management, explaining how high blood pressure serves as the foundation for multiple cardiovascular and health complications. He shares recent evidence-based guidelines and practical strategies that patients can implement to optimize their blood pressure control and reduce their risk of serious health events. Key Takeaways: Blood pressure is a critical health metric that directly influences the risk of heart attack, stroke, atrial fibrillation, cardiac failure, and renal failure, making it essential to measure and manage properly. Current guidelines recommend a systolic blood pressure target of less than 130 mmHg, a significant shift down from the previous 140 mmHg target established in 2017. The SPRINT trial demonstrated that achieving blood pressures under 120 mmHg reduces cardiovascular and all-cause mortality by 25%, with additional benefits including improved blood flow and decreased dementia risk. A 24-hour ambulatory blood pressure monitor provides comprehensive data that helps identify white coat hypertension and gives a complete picture of blood pressure patterns throughout the day and night. An echocardiogram (heart ultrasound) should be considered for patients with elevated blood pressure to assess whether the heart muscle has thickened in response to increased pressure load. Switching to potassium chloride salt substitutes instead of sodium chloride can reduce stroke incidence by 14%, major adverse cardiac events by 13%, and all-cause mortality by 12%. Weight loss provides an exceptional return on investment for blood pressure management, with each kilogram lost resulting in approximately one millimeter of mercury reduction in blood pressure. There is no evidence that achieving lower blood pressure targets increases adverse events or negatively impacts quality of life, even when additional medications are required. Read more

EP237: Are Supplements Good or Bad?

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, a practicing cardiologist and author, hosts this episode to demystify the confusing world of dietary supplements and vitamins. Rather than presenting supplements as simply "good" or "bad," Dr. Bishop explores the nuanced evidence behind popular supplements, particularly for heart health, and explains why many clinical studies fail to capture the full picture of how supplements work in real life. Key Takeaways: Studies showing supplements like fish oil or vitamin D have "no benefit" often lack important context—the study participants may have already had adequate nutrient levels, or the doses tested may have been too low to be therapeutic. Fish oil appears beneficial for specific high-risk populations, particularly people with coronary artery disease and elevated triglyceride levels taking high doses, suggesting the supplement works best for targeted patient groups rather than the general population. Supplements don't work in isolation; they require complementary factors like proper nutrition, exercise, and other lifestyle habits to produce measurable health outcomes—similar to how a cake requires multiple ingredients, not just flour. Dr. Stephen Sinatra recommends four key supplements for cardiac health: Coenzyme Q10, L-carnitine, D-ribose, and magnesium, which collectively support heart function through various metabolic pathways. The supplement industry is massive and often creates confusion; patients should seek evidence-based guidance rather than relying on marketing claims or popular press reports. Individual supplementation decisions should be personalized based on personal health status, existing diet, and specific health conditions rather than following a one-size-fits-all approach. The quality and source of supplements matter significantly, so consumers should purchase from reputable vitamin stores or trusted online dealers and seek professional advice. Definitive answers about supplement efficacy may never come from randomized controlled trials due to the complexity of evaluating how multiple ingredients work together in the human body. Read more

EP236: Please, Please, Please, Ask!

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 Dr. Warrick Bishop is a practicing cardiologist and author dedicated to improving patient care through heart health education. In this episode, he discusses medication adherence—the importance of patients sticking to their prescribed medications—using a real patient case study to illustrate the serious consequences of stopping medications without medical consultation. The episode emphasizes the dangers of misinformation and the critical role of open communication between patients and their healthcare providers. Key Takeaways: Medication adherence is crucial; a patient in his case study stopped taking statin therapy based on unfounded concerns about dementia, leading to disease progression and need for invasive intervention. There is no scientific evidence that statins cause dementia; over 30 studies suggest statins may actually reduce Alzheimer's disease risk by preventing multi-infarct dementia. Patients should seek medical advice from their treating physician rather than well-meaning friends or acquaintances, even if those friends are doctors unfamiliar with their specific health profile. Misinformation about medications spreads easily through family, friends, pharmacists' comments, and internet research, making it difficult for patients to distinguish fact from fiction. A "nocebo effect" (negative expectation creating actual harm) can occur when negative ideas about a medication are planted in a patient's mind, making compliance even less likely. Doctors should educate patients at the time of prescribing to explain the "why" behind medication recommendations, as better-educated patients are more likely to adhere to treatment. Patients should never unilaterally stop, reduce, or change their medications without consulting their prescribing doctor, even if they have concerns or suspect side effects. The consequences of stopping appropriate cardiac medications can be severe—ranging from disease progression to heart attack or death—far outweighing theoretical risks from misinformation. Read more

EP235: Fixing Valves in 2022

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 is a practicing cardiologist and author dedicated to improving patient care through heart health education. In this episode, he explores the four main valves of the heart and discusses cutting-edge technological advances—particularly percutaneous and transcatheter techniques—that are revolutionizing how valve problems are treated without major surgery. The focus is on emerging non-invasive approaches for aortic, mitral, and tricuspid valve issues and their growing role in modern cardiology. Key Takeaways: The heart has four main valves (tricuspid, pulmonary, mitral, and aortic) that control blood flow and can deteriorate over time, causing leaking or narrowing. Aortic valve narrowing affects approximately 1% of the population and becomes increasingly common with age, making non-invasive treatment options increasingly valuable. Transcatheter aortic valve implantation (TAVI) allows deployment of new valves through blood vessels in the leg, avoiding major chest surgery and becoming standard practice for high-risk and intermediate-risk patients. Transcatheter edge-to-edge repair for leaking mitral valves is available but currently less advanced than aortic technology, with higher mortality rates (4% at 30 days) and is typically reserved for very high-risk surgical candidates. Tricuspid valve repair using percutaneous transcatheter techniques shows the most promise because the lower-pressure right heart system allows devices to work more effectively with less strain. Early intervention with transcatheter tricuspid repair can prevent severe regurgitation that leads to dangerous organ congestion and extremely high mortality rates in advanced stages. Regular echocardiogram screening and baseline heart imaging are essential preventative measures to detect valve problems early before they progress. Blood pressure control is critical for valve health, as elevated pressure increases wear and tear on valves and should be monitored with a 24-hour blood pressure monitor. Patients should maintain regular check-ups with their GP and consider consulting a cardiologist for preventative care and baseline cardiac imaging. Read more