Heart Attacks are Preventable!

EP174: Talking Side Effects With Dr. Begg

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 practicing cardiologist and author, hosts this episode with guest Dr. Alistair Begg, an experienced cardiologist from Adelaide with expertise in cardiac rehabilitation. The episode focuses on understanding medication side effects in cardiology, exploring how doctors and patients should communicate about adverse reactions and manage them effectively. Key Takeaways: Every medication and treatment carries both risks and benefits that must be clearly explained to patients, including potential side effects, efficacy limitations, and financial costs. There are three distinct types of adverse medication reactions: true allergies (severe, brisk immune responses), idiosyncratic reactions (unpredictable individual responses occurring in specific populations), and intolerances (dose-dependent reactions affecting tolerability). Statin myopathy (muscle damage from statins) is an idiosyncratic reaction occurring in approximately 1 in 80,000 people and requires blood testing to monitor; repeated exposure after severe reactions should be avoided. The first dose increment of most cardiac medications provides the greatest therapeutic benefit, while doubling the dose typically produces only marginal improvements (e.g., 6% additional cholesterol reduction with statins) while increasing side effects. Combination therapy using lower doses of different medications working through different pathways often provides superior results with fewer side effects compared to increasing single-agent dosing. For statin-intolerant patients, low-dose statin therapy combined with other cholesterol-reducing agents (such as absorption inhibitors) can provide significant cholesterol reduction without excessive side effects. Patients must communicate medication concerns to their healthcare team rather than stopping medications independently, as discontinuing essential drugs (like antiplatelet agents after stent placement) can be life-threatening. Certain blood pressure medications, particularly older agents like prazosin and early ACE inhibitors, require very low starting doses due to rapid onset and risk of sudden, severe drops in blood pressure. Some medications require slow dose escalation because patients initially show heightened sensitivity, but the body adapts over time, eventually requiring higher doses for effectiveness. Effective medication management requires collaborative communication between patients and their prescribing physicians to identify solutions for side effects, adjust dosages, or find alternative therapeutic combinations. Read more

EP173: Blood Pressure Tablets At Night And Fraudulent Research

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 patient education about heart health, believing that informed patients receive better care. In this episode, Dr. Bishop discusses the HYGIA trial, a controversial 2019 study examining whether taking blood pressure medications at night is more beneficial than taking them in the morning, and explores the broader implications of fraudulent or flawed research on clinical practice. Key Takeaways: The HYGIA trial (2019) randomized 20,000 patients to take blood pressure medications either morning or night, reporting a dramatic 45% relative risk reduction in cardiovascular disease outcomes. The trial's credibility has been questioned due to methodological concerns including unclear randomization procedures, the inclusion of 15 primary endpoints (which dilutes statistical accuracy), and unusually low patient loss-to-follow-up rates (only 607 out of 19,000). A troubling finding was a 40% increase in non-cardiovascular deaths from causes unrelated to blood pressure medication, such as accidents and cancer, which raised additional red flags about the trial's validity. Dr. Bishop emphasizes that the trial remains under investigation with no final conclusions, highlighting the importance of scrutinizing studies that claim results that seem "too good to be true." Improved medication adherence is a practical benefit of nighttime dosing for some patients, as incorporating tablets into evening routines can enhance compliance. Beta-blockers taken at night may reduce daytime fatigue side effects, allowing patients to avoid tiredness during waking hours while still receiving therapeutic benefits. Nighttime dosing can help lower blood pressure overnight without causing problematic drops during daytime activities, reducing the risk of postural hypotension or dizziness when standing and walking. Dr. Bishop's clinical practice selectively uses nighttime blood pressure medication dosing in specific situations where it demonstrates clear individual patient benefits. Read more

EP172: Cholesterol Statins and Brain Function

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 is a practicing cardiologist and author dedicated to educating patients about heart health. In this episode, he addresses two common patient questions: how low cholesterol can go without affecting brain function, and whether statins impair cognitive function. Through examination of clinical trials and natural examples, Dr. Warrick provides evidence-based reassurance about the safety of aggressive cholesterol lowering and statin use for brain health. Key Takeaways: The Ebbinghaus study demonstrated that very low LDL cholesterol levels achieved with PCSK9 inhibitors produced no measurable cognitive impairment, even at levels lower than typically seen after heart attack treatment. Newborn babies naturally have very low LDL cholesterol levels (50-70 mg/dL) during their most active period of brain development, suggesting the brain functions well at these low levels. Families with non-functioning PCSK9 genes maintain very low cholesterol throughout their lives and show no brain dysfunction or cognitive abnormalities, often living long healthy lives. The PROSPER study of nearly 6,000 elderly patients found no difference in cognitive decline between those taking pravastatin and control groups over 3.5 years. The Heart Protection Study using simvastatin and the Jupiter trial using rosuvastatin both found no difference in cognitive outcomes between statin users and non-users across thousands of patients. Of 12 small trials specifically examining statins and cognition, nine showed no difference, one suggested decline, and two suggested cognitive benefit. Some statins are lipophilic (fat-soluble) and may accumulate in brain tissue, while others like rosuvastatin are hydrophilic (water-soluble) and less likely to affect the brain. Individual responses to statins vary, and mental fog may result from multiple lifestyle factors; if cognitive concerns arise, switching to less brain-penetrating statin options is a reasonable approach. Read more

EP171: Angela Hartly Interviewing Doctor Warrick Bishop on Stents and Statins

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 from Australia with a passion for patient education in heart health, hosted here by Angela from Healthy Hearties. In this episode, they address a common patient concern: whether statins are necessary after receiving multiple stents, particularly when patients experience side effects like lethargy and don't feel significantly better following the procedure. Key Takeaways: If you've had three stents but aren't feeling better, something may be wrong—consult your cardiologist to rule out stent problems, additional narrowing, heart failure, or other complications rather than assuming it's just the medication. Yes, patients who have had a heart attack, stroke, bypass, or stent placement should take statins because robust scientific evidence over 25 years shows that lowering cholesterol in these high-risk individuals reduces future cardiac events. While high cholesterol alone is not a precise predictor of who will have a heart attack, cholesterol-lowering is critical once disease has been identified and documented. The Odyssey trial found that 75% of patients who believed they couldn't tolerate statins were actually able to take them without side effects, meaning many people unnecessarily avoid therapy that could help them. True statin side effects affect approximately 25% of patients, but it's essential to be absolutely certain the statin is causing the problem before stopping it, as many symptoms may be coincidental. Statin intolerance is dose-dependent, not an allergy, so adjusting the dose, frequency, or switching to a different statin (such as from lipophilic to hydrophilic formulations) can often resolve side effects. Strategies to manage statin side effects include taking alternate-day doses, reducing frequency to 2-3 days per week, combining with complementary cholesterol-lowering agents like ezetimibe, or trying coenzyme Q10 supplementation. Different statin formulations—even generic versus brand versions of the same drug—can produce different side effects due to varying inactive ingredients and fillers. Dr. Warrick offers approximately 150 podcasts on heart health topics, available free through the Healthy Heart Network app, providing accessible education for patients wanting to learn more about their condition and treatment options. Read more

EP170: Why The Cholesterol and Statin Controversy?

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 who hosts this podcast to help patients understand heart health through education. In this episode, Dr. Bishop addresses the "statin and cholesterol conspiracy" by establishing key conceptual frameworks—including the differences between primary and secondary prevention, association versus causation, and population versus individual risk—before examining the scientific evidence and controversy surrounding statins, cholesterol, and dietary fat. Key Takeaways: Primary prevention (stopping a first heart attack) is harder to demonstrate benefit from than secondary prevention (preventing a second heart attack) because it requires treating large populations with uncertain individual outcomes. Association and causation are often confused in health discussions; factors like high cholesterol and saturated fat increase risk but do not directly cause disease in every individual. Population-based risk assessments (e.g., a 5% risk over 10 years) should not be applied directly to individuals, whose actual risk is either 0% or 100% depending on whether they have an event. Cholesterol and coronary artery disease should be understood as contributory factors in a multifactorial process, not absolute or singular causes. The 2013 Abramson paper reasonably questioned routine statin use in primary prevention for individuals with less than 10% risk over 10 years. The Malhotra paper highlighted that reducing dietary fat often inadvertently increases sugar consumption in commercial food products, potentially increasing insulin stimulation and weight gain. The PREDIMED trial demonstrated that Mediterranean diets enhanced with olive oil or nuts were superior to low-fat diets for primary prevention, suggesting not all fats are harmful. The Minnesota Coronary Experiment showed no cardiovascular benefit from replacing saturated fats with linoleic acid (corn oil), suggesting polyunsaturated fats from corn are not ideal replacements. Secondary prevention studies (DART and Spokane) support Mediterranean-style diets with olive oil and fish oil for individuals who have already had cardiac events. Rather than polarizing the debate into "good versus bad," the evidence suggests a Mediterranean diet with monounsaturated fats, nuts, leafy greens, and omega-3 oils is beneficial, while conspiracy theories can be sidestepped in favor of focusing on scientific evidence. Read more

EP169: What Causes Heart Attack?

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. Warrick Bishop is a practicing cardiologist and author dedicated to educating patients about heart health, believing that informed patients receive better care. In this episode, he provides a detailed explanation of how heart attacks occur, emphasizing the critical importance of understanding this process given that heart attacks account for 9 million deaths annually worldwide and affect people of all ages, including approximately 20% of victims under age 65. Key Takeaways: Heart attacks result from myocardial ischemia (lack of blood flow to heart muscle) or myocardial infarction (death of heart tissue), caused by arterial blockages that prevent adequate blood supply. Plaque buildup in arteries begins with localized wear and tear on the arterial lining (endothelium), which triggers the body's repair process and brings cholesterol into the damaged area. LDL (low-density lipoprotein or "bad cholesterol") deposits cholesterol into the arterial tissue, triggering an inflammatory response where white blood cells called macrophages move in to clear excess cholesterol. Macrophages can become overwhelmed by excess cholesterol, swell up, and rupture, releasing destructive enzymes that cause scarring and create a foundation for calcium deposits and plaque formation. Fatty plaques develop a thin fibrous cap and can rupture inward into the artery, causing plaque contents to mix with blood and trigger dangerous clot formation. Approximately 40% or more of heart attacks occur on plaques that were not limiting blood flow prior to rupture, meaning patients can feel completely healthy right up until the artery closes off. The silent nature of plaque development makes cardiovascular maintenance and understanding personal risk factors critically important for prevention. A sudden clot blocking an artery can cause the heart muscle to become irritable and flip into a dangerous electrical rhythm that can be fatal. Read more

EP168: Angela Hartly Interviewing Dr Warrick Bishop—When We Fix Narrowed Arteries

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 an Australian cardiologist and author passionate about patient education and heart disease prevention. Angela from Healthy Hearties interviews him about common cardiac questions from their heart health group. The episode focuses on stenting procedures, arterial blockages, and strategies for managing multiple coronary lesions. Key Takeaways: Cardiologists typically consider stenting when an artery is narrowed by 70% or more, but must confirm the blockage actually limits blood flow (hemodynamic significance) through stress testing or other functional assessments. The ISCHEMIA trial demonstrated that patients with significant coronary narrowings had similar outcomes over 3-4 years whether they received immediate stents or optimal medical therapy alone, changing how quickly doctors intervene. Stents are more beneficial for relieving angina symptoms than for preventing future cardiac events compared to medical management alone. Patients with stents should take dual antiplatelet therapy (aspirin plus a second antiplatelet agent) and cholesterol-lowering medications to reduce future cardiac events. New PCSK9 inhibitor drugs can lower LDL cholesterol to very low levels and potentially cause plaque regression, though they are expensive and typically reserved for high-risk patients or those with familial hypercholesterolemia. Non-flow-limiting blockages (intermediate lesions) should not be stented, and patients should not worry about them if managing risk factors properly. The foundation of cardiac health after stenting involves controlling cholesterol and blood pressure, regular exercise, healthy eating, and adherence to medications—not rushing into additional interventions. Educated patients achieve the best healthcare outcomes, making patient understanding and engagement critical to long-term cardiac health. Read more

EP167: The 10 Commandments For Avoiding Heart Attack

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 outlines his "10 Commandments of Good Heart Health," a comprehensive framework for preventing cardiovascular disease and maintaining optimal cardiac wellness. The episode walks listeners through each commandment in detail, emphasizing that early intervention and lifestyle modifications are foundational to long-term heart health. Key Takeaways: Lifestyle is the foundation of heart health and must be prioritized early in life; you cannot neglect it for decades and expect positive results through last-minute changes Building a healthcare team—including family doctors, specialists, dietitians, and exercise physiologists—significantly improves the ability to manage cardiovascular health effectively Adults aged 40-75 should have their cardiovascular risk assessed using risk calculators to guide personalized treatment decisions about medications and interventions A heart-healthy diet emphasizes plenty of greens, fruits, nuts, legumes, and garlic while minimizing saturated fats, processed foods, refined sugars, and sugary drinks Exercise should consist of at least 150 minutes per week at moderate intensity, but it must be enjoyable to maintain long-term compliance Type 2 diabetes and pre-diabetes can be significantly improved or reversed through lifestyle modifications like dietary changes and regular exercise; medications like metformin are recommended when lifestyle alone is insufficient Smoking has no cardiovascular benefits and carries only serious health risks; most people require multiple quit attempts (averaging six) to successfully stop Aspirin should only be used selectively for higher-risk patients based on individual risk assessment, not as a blanket preventive measure for all adults Cholesterol treatment with statins is recommended when LDL cholesterol exceeds 190 mg/dL (4.9 mmol/L), or for diabetic patients and those with high cardiovascular risk scores Blood pressure management should begin with non-pharmaceutical approaches like weight loss, exercise, and alcohol reduction before considering medication Read more

EP166: Deep Vein Thrombosis & Factor 5 Leiden

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 educating patients about heart health and helping them make informed medical decisions. In this episode, Dr. Bishop provides a comprehensive overview of deep vein thrombosis (DVT), pulmonary embolism (PE), and Factor V Leiden—a hereditary clotting disorder—explaining their causes, symptoms, diagnoses, and treatments. The episode aims to help listeners understand these serious but manageable cardiovascular conditions. Key Takeaways: DVT (deep vein thrombosis) is a blood clot in the deep veins, most commonly in the legs, causing swelling, pain, and redness that can be diagnosed through ultrasound. DVT is treated with blood thinners to prevent clot extension rather than dissolve it, as the body naturally breaks down clots over approximately three months. PE (pulmonary embolism) occurs when a clot from a DVT travels to the lungs and becomes lodged in lung blood vessels, which can be life-threatening and requires immediate diagnosis via CT pulmonary angiogram. Risk factors for DVT include immobility, pregnancy, obesity, smoking, oral contraceptive use, surgery, cancer, and advanced age. Approximately 30% of DVT and PE cases have a hereditary cause, with Factor V Leiden being the most common genetic clotting disorder. Factor V Leiden is a genetic mutation where the blood protein Factor V doesn't properly interact with protein C, the body's clot-preventing mechanism, increasing clot formation risk. PE symptoms include sudden shortness of breath, rapid heartbeat (tachycardia), collapse, and occasionally coughing up blood, requiring urgent treatment with blood thinners and sometimes clot-busting drugs. Long-term blood thinner therapy lasting six months to life is recommended for PE patients, particularly those without a clear provocation for their clot. Factor V Leiden requires special consideration in young patients with clots, pregnant women, and those using estrogen-based oral contraceptives, with smoking strongly discouraged. Interestingly, Factor V Leiden has not been linked to stroke risk in non-valvular atrial fibrillation, despite its association with increased clotting tendency. Read more

EP165: Heart Conditions & Beta Blockers

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 educating patients about heart health. In this episode, he discusses four important cardiovascular topics: atrial fibrillation ablation, left atrial appendage occlusion devices, heart failure with preserved ejection fraction, and beta-blocker duration after heart attack. Key Takeaways: The KABANA trial (2,000+ patients over 5 years) showed that electrophysiological ablation reduced atrial fibrillation recurrence to 6% compared to 14% with drug therapy, though there was no difference in final health outcomes. Atrial fibrillation ablation is primarily beneficial for reducing symptoms rather than improving patient outcomes, particularly for asymptomatic patients. Left atrial appendage occlusion devices (like the Watchman) block the heart chamber where blood clots form during atrial fibrillation, offering an alternative to blood thinners for high-bleeding-risk patients. Recent studies on left atrial appendage closure devices show comparable but not definitively superior results to blood thinners, with questions remaining about study robustness. Blood thinners provide additional protective benefits beyond stroke prevention, including reduced risk of deep vein thrombosis and pulmonary embolism. Heart failure with preserved ejection fraction (a stiff heart that contracts normally but doesn't relax) is increasingly common with aging and is linked to high blood pressure and obesity, particularly in women. Milrinone, a phosphodiesterase inhibitor, shows early promise as a novel treatment for heart failure with preserved ejection fraction, though current evidence is preliminary with only small patient populations studied. Beta-blockers should be continued for at least one to two years after a heart attack to maintain cardiovascular benefits, with diminishing returns beyond two years. Read more