Heart Attacks are Preventable!

EP201: Dan's Journey 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, a practicing cardiologist and author, hosts this episode featuring Dan, a 45-year-old patient from Tasmania who recently underwent coronary artery bypass grafting. Despite being fit, active, and an unlikely candidate for heart disease, Dan's story reveals how preventative screening and early intervention saved his life. The episode explores Dan's journey from routine cholesterol testing through diagnosis and the events leading to his open-heart surgery. Key Takeaways: A seemingly healthy, fit 45-year-old man with no obvious risk factors discovered significant coronary artery disease through preventative screening prompted by an incidental ear infection and a doctor's recommendation for routine blood tests. Elevated cholesterol levels (high eights) served as the primary risk enhancer that justified advanced imaging despite Dan's low-risk profile by conventional calculators and lack of typical cardiac symptoms. Subtle warning signs can be easily dismissed—Dan attributed his shortness of breath during intense exercise to being "out of shape" after COVID lockdowns and aging, rather than recognizing it as a potential cardiac symptom. Starting low-dose aspirin and cholesterol medication as a precautionary measure while awaiting imaging results proved crucial, representing a "better safe than sorry" approach when arterial disease status is unknown. A CT coronary angiography (CTCA) scan was recommended as a more precise diagnostic tool than relying solely on medication to manage risk, allowing for targeted treatment decisions. The timing of Dan's diagnosis was critical—his ear surgery delayed the CT scan until after Christmas, during which his symptoms worsened significantly, including becoming breathless on mild inclines. Physicians should maintain a low threshold for expediting follow-up appointments when imaging reveals high-risk features, as early intervention can be lifesaving even if it creates temporary patient anxiety. Family history of premature coronary disease (Dan's uncle had bypass surgery in his late 60s) combined with elevated cholesterol created justification for preventative imaging in a younger patient. Read more

EP200: Celebrating My 200th Podcast

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 uses education to help patients understand their heart health, believing that educated patients receive the best care. This episode marks the celebration of his 200th podcast, where he reflects on his four-year journey producing content on cardiovascular health and shares his expansive work in cardiac education and book authorship. Key Takeaways: Dr. Bishop has built a substantial podcast following with hundreds of subscribers and thousands of downloads over four years, demonstrating the audience's appetite for accessible cardiac health education. The Healthy Heart Network membership platform offers both free and premium tiers, providing access to podcasts, blogs, courses, and increased personal engagement with Dr. Bishop. Dr. Bishop has authored multiple books including "Know Your Real Risk of Heart Attack" and "Atrial Fibrillation Explained," with upcoming releases on cardiac failure, cardiac rehabilitation, cholesterol and statins, and heart attack prevention. He intentionally writes books with dual audiences in mind—accessible to the general non-medical population while containing sufficient detail to educate healthcare professionals including GPs, nurses, and trainee doctors. Dr. Bishop has produced two TED Talks and secured interviews with notable public figures like Greg Page (original Yellow Wiggle) and Darren Lehman (former Australian cricket coach) to enhance his cardiac rehabilitation content. The Healthy Heart Network is developing a web-based "cardio check" platform featuring virtual heart scan consultations to guide patients through cardiac imaging processes. An innovative health monitoring device is in development to track multiple cardiac parameters including rhythm, pulse, blood pressure, heart rate variability, and oxygen saturation for premium membership users. The core mission emphasizes that sharing heart health education broadly helps maximize its positive impact on public health outcomes. Read more

EP199: Coffee, Statins and Biodegradable Pacemakers

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 heart health through evidence-based information. In this episode, Dr. Bishop discusses three fascinating topics in cardiac care: coffee consumption and heart arrhythmias, the risk-benefit profile of statin therapy, and the emerging technology of biodegradable pacemakers. The episode emphasizes how educated patients can make better healthcare decisions by understanding the latest research and innovations. Key Takeaways: A UK biobank study of 400,000 people found no strong association between regular coffee consumption (1-3 cups daily) and the development of heart arrhythmias, providing reassurance for coffee drinkers. Genetic analysis revealed that rapid metabolizers of caffeine tend to drink more coffee, demonstrating individual variation in how people process caffeine. Patients with existing atrial fibrillation or supraventricular tachycardia should monitor their personal response to coffee, as individual sensitivity varies. A meta-analysis of 60+ statin trials covering 120,000 people showed that per 10,000 patients treated annually, statins prevent 19 heart attacks, 9 strokes, and 8 cardiovascular deaths. While muscle aches and pains do occur as statin side effects, the significant cardiovascular benefits substantially outweigh the tolerability concerns for most patients. Biodegradable pacemakers are being developed to temporarily support heart rhythm after cardiac surgery without the infection risks associated with external wires and boxes. These experimental biodegradable devices use wireless inductive power technology (similar to smartphone chargers) that can function from up to 15 inches away, eliminating the need for leads or skin breaches. Biodegradable pacemakers are currently in animal trials and represent an innovative convergence of engineering and cardiac medicine that could transform post-surgical care. Read more

EP198: Blackouts and Syncope

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, believing that informed patients receive the best care. In this episode, Dr. Bishop provides a comprehensive overview of syncope (blackouts), explaining the various medical causes and sharing a successful clinical case study of a patient with vasovagal fainting. The episode emphasizes the importance of proper diagnosis and treatment for this common but potentially serious condition. Key Takeaways: Syncope is a medical term derived from a word meaning "pauses" and refers to blackouts or loss of consciousness that require proper medical evaluation. Blackouts can originate from three main sources: the brain (such as seizures), the heart (too fast or too slow), or blood pressure regulation issues. Seizure-related blackouts are typically characterized by warning signs (aura), violent shakes or tremors, and specific seizure patterns that distinguish them from cardiac causes. Cardiac causes of syncope include arrhythmias (heart racing) or conduction failures that cause sudden pauses, often resulting in sudden collapse. Orthostatic hypotension (blood pressure drops upon standing) is a common cause of blackouts, particularly when moving from resting to upright positions. Vasovagal syncope results from overactivity of the parasympathetic nervous system (rest and digest response) and presents as a "simple faint" triggered by emotional stress, blood, needles, or other specific stimuli. Dr. Bishop successfully treated a 70-year-old patient's decade-long fainting episodes using a two-pronged approach: beta blockers to dampen heart rate acceleration and anticholinergic agents (like BuskPam) to attenuate the parasympathetic response. Treatment strategies for vasovagal syncope should address both the initial rapid heart rate increase and subsequent dangerous slowdown using low-dose medications that carry minimal risk. Patients experiencing syncope should consult both their general practitioner and a cardiologist, as driving restrictions or exemptions may be necessary depending on the underlying cause. Syncope is a treatable and common condition, making proper diagnosis and intervention essential for patient safety and quality of life. Read more

EP197: Thinking About Cholesterol Getting Into 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. Eric Bishop is a practicing cardiologist and author dedicated to educating patients about heart health and the latest advances in cardiac care. In this episode, Dr. Bishop discusses cholesterol and coronary artery disease, focusing on the research of Vladimir Subotin from the Russian Academy of Sciences, who proposes an alternative mechanism for how cholesterol accumulates in artery walls. The episode challenges conventional understanding while emphasizing that lowering cholesterol in high-risk patients demonstrably reduces heart attack risk. Key Takeaways The traditional view holds that cholesterol particles (LDL) circulate in the bloodstream and deposit in artery walls at points of wear and tear, but this mechanism is difficult to directly observe in living organisms. Subotin's research suggests cholesterol may not primarily enter arteries from the bloodstream but rather accumulates through an alternative pathway. Artery walls consist of three layers (tunica intima, tunica media, and tunica adventitia); when examined under microscopes, cholesterol deposits appear in locations inconsistent with the traditional inside-to-outside migration theory. Arterial wear and tear triggers local inflammation and irritation, causing cells to release tissue factors that signal the body to send repair materials, including cholesterol, to the damaged area. Subotin proposes cholesterol travels into the middle artery layer via the vasa vasorum—tiny blood vessels that supply nutrients to the artery wall itself—rather than crossing from the arterial lumen. Regardless of the specific mechanism by which cholesterol enters artery walls, clinical evidence confirms that lowering LDL cholesterol in high-risk patients reduces their future heart attack risk. Coronary artery disease is multifactorial; cholesterol alone does not explain the disease, and factors like inflammation, blood pressure, and arterial wear and tear all play important roles. Read more

EP196: Funny Valve and Big Aorta

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 provides a comprehensive overview of bicuspid aortic valve disease, explaining what it is, how it develops, and how it's managed. He emphasizes that educated patients receive the best healthcare outcomes and discusses both the valve condition and the associated aortopathy (aortic dilation) that can occur. Key Takeaways: A bicuspid aortic valve is a congenital condition where the aortic valve has two leaflets instead of the normal three, making it the most common congenital cardiac abnormality. Bicuspid aortic valves function in an unbalanced manner similar to an engine running on three cylinders instead of four, causing premature wear and tear compared to normal tricuspid valves. The condition is typically not apparent until mid to late adulthood (40s-60s) when the valve begins to deteriorate, though it can be detected earlier through family history screening, heart murmurs, or incidental imaging. An aortopathy (weakened aorta with dilated connective tissue) frequently accompanies bicuspid aortic valve disease, which is a critical concern because severe dilation can lead to life-threatening rupture or dissection. Blood pressure management using ACE inhibitors (like perindopril and ramipril) and angiotensin receptor blockers (like candesartan and valsartan) effectively slow aortic dilation beyond their blood pressure-lowering effects. Surveillance using ultrasound and CT imaging is essential, with CT scans providing accurate aortic measurements; aortic replacement is typically considered when diameter reaches 45 millimeters (normal is 35-38 millimeters). Treatment options depend on severity: valve-only replacement, aorta-only repair, or combined valve and aorta surgery; valve replacement can be performed via open heart surgery or transcutaneous aortic valve implantation (TAVI). Family screening is strongly recommended because bicuspid aortic valve is genetic, and early detection with proper management allows patients to maintain near-normal life expectancy without significantly compromised health outcomes. Read more

EP195: Liquorice of All Sorts

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. In this episode, Dr. Bishop explores licorice—a common confectionery and herbal remedy—and explains the serious cardiovascular risks associated with excessive consumption, including how it can trigger pseudo-hyperaldosteronism and dangerous changes in blood pressure and electrolyte balance. Key Takeaways: Licorice is derived from the root of the Glyzira glabra plant and is consumed as candy, tea, or herbal supplement, often for digestive and bowel health benefits. Excessive licorice consumption can cause pseudo-hyperaldosteronism, a false elevation of aldosterone-like effects that mimics the body's stress response to low blood pressure. Aldosterone is a crucial hormone that regulates fluid balance, salt retention, and blood pressure through the renin-angiotensin system activated in response to physical stress or low blood pressure. Glycyrrhizin, the active ingredient in licorice, blocks enzymes that break down cortisol and aldosterone, leading to increased levels of these hormones in the body. Just 100 milligrams of glycyrrhizin can trigger problematic effects; a standard 300-gram bag of licorice contains six servings, each with 100 milligrams of glycyrrhizin. A single licorice tea bag can contain up to 100 milligrams of glycyrrhizin, meaning consuming more than one per day risks causing pseudo-hyperaldosteronism. Excess licorice leads to sodium retention, potassium loss, fluid retention, and elevated blood pressure, posing particular risks for those already suffering from hypertension. Other herbal supplements present cardiovascular risks: garlic, ginkgo, and echinacea can thin blood and increase bleeding risk when combined with anticoagulants; St. John's Wort reduces absorption of beta blockers and statins. Green tea, alfalfa, ginseng, and ginger can interfere with blood thinners like warfarin, while grapefruit can elevate statin levels to dangerous concentrations. Patients should consult their pharmacist before combining herbal supplements with prescription medications to avoid potentially serious drug interactions and adverse health effects. Read more

EP194: Monitoring Medications 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 his colleague Dr. Alistair Begg, also a cardiologist from Adelaide. The episode focuses on the comprehensive monitoring protocols cardiologists implement when starting patients on cardiac medications, including cholesterol-lowering drugs, blood pressure medications, and rhythm management therapies. Key Takeaways: Blood tests are essential for monitoring both the effectiveness of cardiac medications and their potential side effects, particularly for drugs like statins that can affect muscle and liver function. Creatinine kinase (CK) and liver function tests (LFTs) should be monitored in patients on statins, but baseline measurements are important since normal CK levels vary by individual and can be elevated by exercise, dehydration, or physical activity. A CK elevation requires clinical judgment—mild elevations may be monitored without stopping medication if the drug's benefits outweigh the risks, while significant elevations (such as over 2,500-3,000) warrant immediate investigation and potential medication discontinuation. ACE inhibitors and angiotensin-2 blockers used for blood pressure management require periodic kidney function monitoring, as they can potentially deteriorate kidney function, particularly in older patients. Diuretics can affect potassium levels and cause dehydration, necessitating regular blood test monitoring alongside blood pressure measurement. 24-hour ambulatory blood pressure monitoring is valuable for detecting white coat hypertension and determining whether patients actually require medication before starting treatment. Rhythm management medications require ECG monitoring to detect drug-induced changes in heart rhythm patterns, particularly monitoring the QT interval for drugs like sotalol and characteristic changes for flecainide. Amiodarone requires regular thyroid and liver function testing, as approximately 25% of patients in some regions experience thyroid abnormalities while taking this medication. Cardiologists should involve patients in medication decisions by discussing both benefits and risks, which increases patient engagement and medication adherence. Effective medication monitoring involves dual tracking: assessing therapeutic effectiveness (cholesterol levels, blood pressure control, rhythm stability) and surveilling for potential adverse effects through blood tests and ECG findings. Read more

EP193: To-Do Lists 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 dedicated to patient education, hosts this episode with Dr. Alistair Begg, a senior cardiologist specializing in rehabilitation based in Adelaide. The discussion focuses on practical "to-do lists" patients should follow when consulting with cardiologists, managing medications, and preparing for medical appointments to ensure optimal care and understanding. Key Takeaways: Patients should bring an up-to-date list of their current medications to consultations, as medications may have changed across different healthcare providers, hospitals, or specialists without central coordination. Creating a written list of questions before visiting a cardiologist helps patients maximize their consultation time and remember important topics they want to discuss. Patients must understand the purpose of each medication, potential side effects to watch for, whether repeats are available, and distinguish between generic and brand names to avoid confusion. Avoid planting nocebo effects by not over-emphasizing side effects; frame medications as "generally well-tolerated" to prevent patients from experiencing imagined adverse effects before even leaving the consultation room. Taking medications at the same time daily establishes routine and improves compliance; some medications require specific timing (e.g., azetamide at night, some with food, others on an empty stomach). If a dose is missed, wait for the next scheduled dose rather than doubling up, as doubling is more likely to cause harm; missing doses of blood pressure medications or blood thinners is more critical than missing statins. Regulation 24 prescriptions in Australia allow patients traveling for extended periods to obtain up to six months of medication supply rather than being limited to one-month supplies. Split medication storage between hand luggage and checked luggage when traveling to ensure backup medications are available if one set is lost. Generic medications contain the same active ingredient as branded drugs but are cheaper and produced by multiple companies; however, differences in fillers and colorings can affect tolerability in some patients. Generic drugs have a wider approval margin (80-120% effectiveness) compared to branded medications, which may impact both effectiveness and tolerability for individual patients. Read more

EP192: Ketogenic Diets and the Heart

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 potential role of ketogenic diets in cardiac failure management, examining the science behind ketone metabolism and how it might benefit heart function while considering its place within current cardiovascular health guidelines. Key Takeaways: Ketogenic diets originated in the 1920s as a treatment for pediatric epilepsy and have since shown potential benefits for neurodegenerative diseases, diabetes, non-alcoholic fatty liver disease, certain cancers, and weight loss. A ketogenic diet typically consists of 70-80% fat, 10-20% protein, and 5-10% carbohydrates, which reduces insulin levels and allows the body to convert fatty acids into ketones for energy. Ketosis is a normal metabolic state that endurance athletes naturally enter after 35-45 minutes of exercise, demonstrating that using ketones as fuel is a natural bodily process. The heart can utilize ketones as an unregulated energy source, raising the theoretical question of whether ketogenic diets could improve cardiac function in heart failure patients. Current research on ketogenic diets specifically for cardiac failure is limited, despite evidence from the EMPA-REG trial showing that reducing glucose levels benefits cardiac failure outcomes. Ketogenic diets contrast sharply with current cardiovascular guidelines that recommend fruits, vegetables, and whole grains—foods that are restricted in keto due to carbohydrate content. Dr. Bishop favors moderate carbohydrate reduction (rather than full ketogenic restriction) as it can reduce insulin levels, aid weight loss, improve HDL cholesterol, and lower triglycerides. While some patients may report subjective benefits from ketogenic diets in cardiac failure, any such approach should only be undertaken under close medical supervision by a cardiologist. Dr. Bishop does not currently advocate ketogenic diets specifically for cardiac failure treatment due to insufficient evidence, though he remains optimistic about future research in this area. More research is needed to definitively establish the safety and efficacy of ketogenic diets in cardiac failure before broader clinical recommendations can be made. Read more