Heart Attacks are Preventable!

EP400: What A Journey!

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 400 Summary Introduction Dr. Warwick Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, celebrates his 400th podcast episode—a milestone achievement in the health podcast space where few series reach such longevity. Over nearly eight years and approximately 50 episodes per year, Dr. Bishop has built a comprehensive audio resource dedicated to helping Australians understand and prevent heart disease, which claims a life every 20 minutes in the country. The episode reflects on the journey, key topics covered, notable guests interviewed, and the evolution of his mission toward holistic health education. Key Takeaways: Heart disease in Australia is a major health crisis, with someone suffering a heart attack every 20 minutes, yet most could be preventable with proper knowledge about blood pressure, weight, and cholesterol management. Reaching 400 episodes is exceptionally rare; very few health podcasts surpass 200 episodes, making this achievement a testament to either Dr. Bishop's persistence or the genuine value listeners derive from the content. Coronary artery calcium scoring and CT coronary angiography have become more widely recognized and utilized tools for heart attack prevention since Dr. Bishop began advocating for them eight years ago. The podcast content has evolved from core cardiology topics (cholesterol, blood pressure, heart disease basics) to broader health subjects including gut microbiome, mental well-being, bone health, longevity science, and emerging therapies like pulsed electromagnetic field therapy. Dr. Bishop has interviewed influential guests including cardiologists (Dr. Fiona Fu), athletes and community leaders (Greg Page, Guy Leach, Darren Lehmann, Adam Weir), and innovators in health technology, leveraging their platforms to advance public health awareness. Common health myths have been systematically debunked throughout the podcast series, including misconceptions that exercise alone prevents heart disease, high HDL cholesterol guarantees safety, statins damage memory, and diet alone can fix high LDL cholesterol. The St. Luke's Health Coronary Calcium Pilot demonstrated that scanning 100 people identified 30% who would benefit from cholesterol-lowering medication and aspirin, with data suggesting approximately 12.5 scans needed to save one life within a decade. Dr. Bishop's Virtual Heart Check website allows Australians to access calcium scores without requiring a GP or specialist visit, democratizing access to preventive cardiac screening across the country. The Healthy Heart Network is being rebranded to the Healthy Life Network, reflecting Dr. Bishop's expanded focus beyond cardiology to comprehensive longevity and wellness based on his own evolving health journey. An AI-powered search tool on Dr. Bishop's website helps listeners locate specific episodes by topic, addressing the lack of episode indexing and improving accessibility to content on particular health subjects. Read more

EP399: Stiff Old Hearts 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: EP399 - Stiff Old Hearts with Dr. Fiona Foo Part 2 Introduction: Dr. Auric Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode featuring Dr. Fiona Foo, an interventional and general cardiologist at Sydney Cardiology Group. This is part two of a discussion on heart failure with preserved ejection fraction (HFpEF), focusing on treatment strategies and prevention of this increasingly common condition where the heart fails to relax properly. Key Takeaways: SGLT2 inhibitors (such as empagliflozin and dapagliflozin) are now first-line treatment for all types of heart failure, including HFpEF, and have been shown to reduce hospitalizations and cardiovascular death. Acute management of heart failure with shortness of breath involves diuretics, primarily furosemide (Lasix), to remove excess fluid and relieve symptoms quickly. Mineralocorticoid receptor antagonists like spironolactone and the newer finerenone help rebalance hormonal pathways disrupted by heart failure and provide long-term benefit for HFpEF patients. Managing underlying comorbidities—including hypertension, diabetes, obesity, and chronic kidney disease—is critical for HFpEF management, as these conditions directly contribute to disease development. Blood pressure control is one of the most significant preventive measures for HFpEF; a target of less than 130/80 mmHg is recommended, with lower being generally better. A 10% reduction in blood pressure meaningfully decreases cardiac workload over 100,000 heartbeats per day and significantly reduces heart failure hospitalization risk. 24-hour blood pressure monitoring provides superior data compared to single or home measurements, revealing the true daily cardiac load and helping optimize treatment targets. Regular exercise provides measurable benefit for HFpEF patients and should be incorporated alongside medical therapy as part of non-pharmaceutical intervention. Blood pressure is often neglected in clinical practice despite being a major modifiable risk factor; patients must actively monitor and manage their blood pressure rather than accept borderline readings. Read more

EP398: Stiff Old Hearts 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. EP398: Stiff Old Hearts With Dr. Fiona Foo Part 1 Introduction: Dr. Warwick Bishop, a cardiologist and author, hosts this episode featuring returning guest Dr. Fiona Foo, a cardiologist at Sydney Cardiologist Group with expertise in both interventional cardiology and prevention. The episode focuses on heart failure with preserved ejection fraction (HFpEF), a condition increasingly prevalent in the population that particularly affects women and older adults, caused by a stiff heart that doesn't relax well rather than one that doesn't pump effectively. Key Takeaways: Heart failure with preserved ejection fraction (HFpEF) occurs when the heart becomes stiff and cannot relax properly, yet produces similar symptoms to reduced ejection fraction heart failure including shortness of breath and fluid accumulation. HFpEF predominantly affects women, who outnumber men two to one, particularly post-menopausal women with hypertension as a major risk factor. Age is one of the most significant risk factors for HFpEF, with prevalence increasing as populations age; the incidence of HFpEF is now rising faster than reduced ejection fraction heart failure. Key risk factors for HFpEF include hypertension, obesity, diabetes, atrial fibrillation, chronic obstructive pulmonary disease, chronic kidney disease, and non-obstructive coronary artery disease. Shortness of breath when lying flat or bending over is a highly sensitive symptom of HFpEF, caused by fluid redistribution in the body and increased pressure in the lungs due to evolutionary adaptations designed for acute blood loss that malfunction in modern aging populations. Brain natriuretic peptide (BNP) is an important diagnostic marker that distinguishes heart-related shortness of breath from lung-related shortness of breath, helping clinicians differentiate between cardiac and pulmonary causes. Natriuretic peptides released by the heart under strain serve protective functions by promoting fluid excretion, vasodilation, and inflammation reduction, making them crucial targets for modern heart failure therapies like Entresto. The body compensates for inadequate heart function by retaining fluid, which under gravity accumulates in the legs while standing but redistributes to the lungs when lying down, explaining positional breathing difficulties in heart failure patients. Read more

EP397: Lucky Man

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: "EP397: Lucky Man" Dr. Warwick, a preventative cardiologist passionate about stopping premature heart disease deaths, interviews Chris Henry, a 73-year-old from Ontario, Canada who runs the Art to Aging information resource. After being encouraged by Dr. Warwick during a previous interview to get a preventative heart scan, Chris pursued cardiac imaging and discovered he had severe coronary artery blockages, ultimately leading to emergency open-heart surgery that likely saved his life. Key Takeaways: Preventative heart screening (calcium score/CT scans) should be a rite of passage for men at 45-50 and women at 55-60, regardless of how healthy or fit someone feels. Coronary artery disease is unpredictable and doesn't discriminate based on fitness level, diet, or feeling well; many people with severe blockages have no symptoms. Early detection of arterial plaque through imaging allows doctors to intervene with proven therapies (cholesterol medications, blood thinners, stents, or surgery) that can prevent major cardiac events. Chris's story demonstrates the difference between managing coronary artery disease and managing death—one in six people die during a heart attack, making prevention critical. Heart attacks cause permanent heart muscle damage that reduces functional capacity for life, whereas preventative intervention avoids this long-term disability. Lack of urgency in preventative care leads to procrastination; people should prioritize getting screening done immediately rather than delaying indefinitely. Invasive angiograms (high-resolution x-ray imaging with dye injection) provide the clearest pictures for surgical planning, though CT angiograms are excellent for initial plaque detection. Chris's immediate access to emergency quadruple bypass surgery prevented what could have been a fatal heart attack, transforming his prognosis from high-risk to highly unlikely to die from coronary artery disease. Cardiac rehabilitation and ongoing medical supervision, combined with preventative therapies, provide long-term protection with grafts typically lasting a minimum of 10 years. Read more

EP396: The St Luke's Health CAC Pilot Data

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 cardiologist, author, and CEO of the Healthy Heart Network who is passionate about helping people live well for as long as possible. In this episode, he presents findings from a pilot program using coronary artery calcium (CAC) scoring through the PRIME (Patient Resourced Initiation of Medical Engagement) health platform, conducted in partnership with St Luke's Health insurance in Tasmania. The episode focuses on how CAC scoring can bridge the gap between perceived risk and actual cardiovascular risk, potentially transforming preventative cardiac care. Key Takeaways: Coronary artery calcium scoring revealed that 31% of asymptomatic participants had calcium scores over 100, indicating they were at risk and warranted cholesterol-lowering therapy and aspirin—despite having no perceived health problems beforehand. There is no correlation between what people believe their cardiovascular risk is and their actual risk as revealed by coronary artery calcium scoring, indicating a significant gap in risk perception. High-risk participants (20% of the cohort with scores over 400) had risk levels equivalent to those who had already suffered heart attacks, strokes, or required stents or bypass surgery. The number needed to scan to initiate therapy was only 3 patients, and only 25 scans were needed to potentially avert a major cardiovascular event within 5 years—demonstrating high clinical efficiency. Coronary artery calcium scoring is cost-effective; scanning 100 people ($30,000 total) only needs to prevent one acute heart attack or angina episode ($30,000-$40,000 per episode) to break even financially. The PRIME health platform showed poor initial engagement (100 participants from 5,000 emails), but those who participated successfully completed the process without needing to see a GP or specialist. High-risk individuals identified through CAC scoring demonstrated improved lifestyle behaviors in follow-up assessments at 3, 6, and 9 months, suggesting the scoring has motivational impact on patient behavior change. Coronary artery calcium scoring serves as a transformative, precise diagnostic tool that provides actionable insights for personalized risk management and lifestyle intervention. Cardiologists have been slow to adopt cardiac CT imaging, preferring traditional treadmill testing, which has hindered broader implementation of this preventative technology in clinical practice. Further expansion of CAC screening through private health insurers and similar platforms could save lives and reduce cardiovascular events at a population level, though more research is needed to validate long-term outcomes. Read more

EP395: AF PEMF and a Rocket Scientist

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, a cardiologist, author, and CEO of the Healthy Heart Network, hosts a podcast dedicated to helping Australians understand and prevent heart disease. In this episode, he welcomes back Mark Fox from Rezona Health, the developer of the Vibe device—a personal pulsed electromagnetic field therapy device—to discuss recent discoveries about how the technology may help manage atrial fibrillation through vagus nerve stimulation. Key Takeaways The vagus nerve is the 10th cranial nerve that runs from the brain through the neck and clusters around the heart, serving as the "super highway" of communication between the brain and organs, controlling the parasympathetic "rest and digest" nervous system. Pulsed electromagnetic field therapy via the Vibe device can stimulate vagus nerve toning by targeting alpha and theta brainwave frequencies, which promote relaxation and balance in the autonomic nervous system. Atrial fibrillation is often triggered by sympathetic nervous system activation (fight-or-flight response) caused by stress, anxiety, or illness, but balance between sympathetic and parasympathetic systems is essential for managing the condition. Early anecdotal evidence shows dramatic improvements in AFib episodes, with one patient reporting her AFib levels dropped from 97% to 2% after using the vagal protocol on the Vibe device. Heart rate variability (HRV) is a critical measurement of autonomic balance, and studies show a single 30-minute Vibe session can increase SDNN (a long-term HRV measurement) by up to 55%. Doctors can reasonably recommend therapies outside standard protocols to patients who've exhausted conventional options, provided the therapy poses no known harm and the patient is fully informed about the evidence level. Most wearable devices measure RMSSD for heart rate variability, but the Vibe device measures SDNN, which researchers believe is a more accurate long-term indicator of cardiovascular health and vagal tone. The research on electromagnetic field therapy for AFib is still emerging, with formal clinical studies currently in development, making current evidence primarily anecdotal but promising enough to warrant further investigation. Read more

EP394: The REAL Truth About Cholesterol

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: EP394: The REAL Truth About Cholesterol Introduction Dr. Auric Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode focused on demystifying cholesterol and its role in heart health. With heart disease claiming a life every 20 minutes in Australia, the episode addresses widespread confusion about cholesterol, cholesterol-lowering medications, and how to properly assess individual cardiovascular risk. The discussion aims to move beyond oversimplified messaging to help listeners understand the complex relationship between cholesterol levels and actual arterial health. Key Takeaways: Cholesterol itself is essential for hormone production, vitamin D formation, and transporting fat-soluble vitamins, but LDL and HDL are transport vehicles (lipoproteins), not cholesterol itself. The common belief that "all LDL is bad and all HDL is protective" is oversimplified; some people have high LDL but healthy arteries, while others have low LDL but significant plaque buildup. Coronary artery calcium scoring and ApoB particle counts are more reliable predictors of heart disease risk than cholesterol levels alone. For secondary prevention (patients who've already had a heart event), lowering cholesterol is unquestionably beneficial and supported by 30+ years of research. Primary prevention (before any heart event) is more complicated and requires personalized assessment rather than blanket recommendations based solely on cholesterol numbers. Advanced imaging of arteries combined with risk calculators provides crucial information to determine who actually needs cholesterol-lowering therapy before experiencing an event. Triglyceride levels and the triglyceride-to-HDL ratio serve as important markers of metabolic health and cardiovascular risk. Cholesterol is only one piece of the heart disease puzzle; inflammation, insulin resistance, and plaque stability are equally important factors. Social media misinformation creates unnecessary confusion, particularly around primary prevention decisions and statin therapy. Individual-by-individual assessment with balanced, sensible approaches—rather than polarizing viewpoints—leads to the best health outcomes. Read more

EP393: Dietary Influences on Pancreatic Cancer and Heart Failure: Salt, Vitamin E, and Plant-Based Diets

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 Introduction Dr. Auric Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode alongside Warwick to discuss evidence-based dietary and lifestyle factors affecting cardiovascular health and cancer risk. The episode covers five major health topics: salt reduction, bone health, pancreatic cancer screening, heart failure treatment advances, and plant-based diet adequacy. Dr. Bishop emphasizes his mission to help people "live as well as possible for as long as possible" by providing actionable health information grounded in recent research. Key Takeaways: Salt substitutes using potassium chloride instead of sodium chloride reduce stroke risk by 15% and death risk by over 10%, making them a valuable intervention for cardiovascular health. Most dietary salt comes from processed and packaged foods rather than salt shakers, so reading food labels and advocating for legislation mandating salt substitutes in processed foods could have significant public health impact. Vitamin E does not improve bone mineral density and may even reduce it at high levels; instead, focus on vitamins D and K2 for optimal bone and vascular health. Pancreatic cancer is particularly difficult to diagnose early (only 15% caught early enough to impact survival) because of its deep abdominal location, though it can be associated with smoking, alcohol, obesity, and family history or BRCA genes. Heart failure with preserved ejection fraction (diastolic dysfunction) is increasingly common in aging populations, but new medications including empagliflozin, dapagliflozin, semaglutide, tirzepatide, and finerenone now offer better treatment options. Weight management and proper blood pressure control are the most effective ways to prevent heart failure with preserved ejection fraction in the first place. Plant-based diets are nutritionally adequate when properly planned with professional nutritionist guidance to address potential deficiencies in B12, iron, calcium, omega-3 oils, zinc, iodine, and protein. Plant-based diets are associated with lower cardiovascular event risk and cardiometabolic disease while reducing overall inflammation, a central driver of chronic disease. Read more

EP392: HDL, Vitamin D, and Triglycerides

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, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode dedicated to helping Australians understand cardiovascular health. With heart disease claiming one life every 20 minutes in Australia, Dr. Bishop focuses on educating listeners about preventable risk factors. This episode explores three interconnected topics: HDL cholesterol function, vitamin D's role in bone health, and triglycerides as metabolic health indicators. Key Takeaways: HDL cholesterol's protective benefits depend on functionality, not just quantity—some people with genetically high HDL levels have dysfunctional particles that increase inflammation and cardiovascular risk rather than reducing it. Drugs developed to raise HDL cholesterol have not demonstrated clear reductions in heart attack rates, suggesting that simply elevating HDL levels is insufficient without ensuring particle function. Vitamin D does not directly build bone but instead facilitates calcium absorption in the gut, making it available for osteoblasts (bone-building cells) to use during bone formation. Vitamin D serves a paradoxical role by both supporting bone building through calcium availability and removing calcium from bones to maintain critical blood calcium levels. Triglycerides are the body's primary fat transport mechanism and rise significantly when carbohydrates (including sugar) and alcohol are consumed, as the liver converts these into triglyceride packages. High triglycerides indicate metabolic dysfunction and serve as a "canary in the mineshaft," signaling insulin resistance, fatty liver risk, prediabetes, and poor lifestyle choices. Elevated triglycerides are often accompanied by low HDL levels and trigger changes in LDL particle size from large, benign particles to small, dense particles that pose greater arterial risk. Reducing carbohydrate and alcohol intake combined with regular exercise can dramatically lower triglycerides, with omega-3 fish oil supplementation providing additional support. The total cholesterol-to-HDL ratio remains a reasonably robust predictor of cardiovascular risk for most people, though individual variations exist. Dr. Bishop's forthcoming book "Cholesterol Explained" (mid-2025) addresses myths surrounding cholesterol, statins, and cardiovascular disease in greater detail. Read more

EP391: Gut Microbiome, Blood Pressure, and Mental Wellbeing

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: EP391 - Gut Microbiome, Blood Pressure, and Mental Wellbeing Dr. Auric Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode focused on three interconnected pillars of health: gut microbiome, blood pressure management, and mental wellbeing. Dr. Bishop emphasizes that understanding and managing these areas is crucial for preventing cardiovascular disease, which claims one life every 20 minutes in Australia and is largely preventable through lifestyle knowledge and intervention. The episode explores how these three health domains are deeply interconnected and collectively influence overall quality of life and longevity. Key Takeaways: The gut is often called the "second brain" because it contains extensive nerve tissue, glial cells, and neurons similar to those found in the brain. The gut microbiome consists of bacteria, viruses, and fungi that play crucial roles in digestion, immune function, inflammation control, blood sugar regulation, and neurotransmitter production, including serotonin. Damaging the gut microbiome can lead to "leaky gut," where unfiltered molecules enter the bloodstream, triggering inflammation, insulin resistance, and even altered brain function. Fiber intake, fermented foods (kimchi, yogurt, cultured vegetables), eating a rainbow of colors, and avoiding excess salt and unnecessary antibiotics are key strategies for maintaining a healthy microbiome. Blood pressure is a "silent killer" and one of the most powerful predictors of heart attack, stroke, kidney disease, and dementia; even a 10% reduction in blood pressure significantly decreases arterial wear and tear. Mental wellbeing directly impacts physical health—depression increases heart attack and stroke risk, while anxiety and chronic stress elevate cortisol and blood pressure levels. Strong interpersonal relationships are among the most significant factors for longevity according to the Harvard longevity study. Improving physical health through better sleep, nutrition, and movement simultaneously improves mental health; conversely, poor sleep and poor diet negatively impact both inflammation and mood. Loneliness, social isolation, and chronic mental stress all drive inflammation, elevate blood pressure, and increase cardiovascular events. These three health domains—gut, blood pressure, and mental wellbeing—are deeply interconnected and create a synergistic effect; addressing all three together produces optimal long-term health outcomes. Read more