Heart Attacks are Preventable!

EP314: Navigating Heart Disease - Treatment Options 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. Episode Summary EP314: Navigating Heart Disease - Treatment Options and Beyond Dr. Warwick Bishop, a cardiologist, CEO of the Healthy Heart Network, and author, hosts this episode to guide listeners through the journey of heart disease diagnosis and treatment. The episode provides a comprehensive overview of the treatment pathway that patients can expect when diagnosed with heart conditions, emphasizing that early intervention and lifestyle changes can prevent many cardiac events. Dr. Bishop covers the full spectrum of treatment options available today and hints at emerging therapies on the horizon. Key Takeaways: Lifestyle modifications form the foundation of heart disease treatment for virtually all cardiac conditions, including weight management, exercise, stress reduction, and alcohol avoidance Atrial fibrillation affects 300,000-400,000 Australians and up to 15% of people over 80, and can often be triggered by preventable factors like stress and alcohol consumption Cholesterol management through medication is central to treating patients with plaque buildup in arteries, with specific targets established for optimal outcomes Antiplatelet medications (like aspirin) reduce blood clotting by decreasing the stickiness of platelets, preventing dangerous clots in coronary arteries while allowing normal clotting at injury sites Procedural interventions range from diagnostic tests (treadmill tests, coronary angiograms) to therapeutic procedures (pacemakers, cardiac ablation for irregular rhythms) Coronary artery bypass grafting remains the most common cardiac surgery, requiring full sternotomy (splitting the breastbone) and often necessitating a heart-lung bypass machine Risk-benefit analysis is essential for all treatment decisions, and patients must be thoroughly informed and consented before undergoing any procedures or surgery Emerging therapies including gene therapy, stem cell therapy, and RNA-based interventions show promise for restoring or regenerating cardiac function in the near future Read more

EP313: The Brain and Low 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. Episode Summary: "EP313: The Brain and Low Cholesterol" Dr. Warwick Bishop discusses a major scientific statement from the American Heart Association regarding the safety of aggressive cholesterol lowering and its effects on brain health. The episode addresses widespread concerns from statin skeptics who claim that lowering cholesterol increases risks of dementia and hemorrhagic stroke. Bishop reviews a comprehensive 39-page scientific statement by a writing group led by Dr. Larry Goldstein that evaluates contemporary evidence on this topic. Key Takeaways: LDL cholesterol lowering consistently reduces the risk of atherosclerotic cardiovascular disease events and heart attacks in high-risk populations, which remain major killers. While some older case-control studies suggested statins might cause cognitive impairment, larger observational studies and randomized controlled trials do not support this conclusion for medium-term follow-up periods up to six years. There is no robust evidence that aggressive LDL cholesterol lowering or statin therapy increases the risk of hemorrhagic stroke (brain bleeding) in patients without prior cerebrovascular disease. Populations with genetically lifelong low LDL cholesterol levels do not show enhanced vulnerability to hemorrhagic stroke, and achieving very low LDL levels does not increase this risk. Lower LDL cholesterol levels correlate with lower overall stroke risk and stroke recurrence, primarily through reduction in ischemic stroke (blockage-related stroke). Concerns about hemorrhagic stroke should not deter clinicians from treating LDL cholesterol to guideline-recommended targets for individual risk stratification. The American Heart Association statement received no commercial funding, indicating an unbiased scientific assessment representing the organization's official position. Individual patient responses vary; some patients report cognitive side effects that require case-by-case management, despite lack of population-level evidence. Additional long-term studies are needed, particularly regarding non-statin cholesterol-lowering agents like PCSK9 inhibitors in specific patient populations. Read more

EP312: QLD Lipid Meeting October 2023

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: EP312 - QLD Lipid Meeting October 2023 Introduction Dr. Warwick Bishop, a cardiologist, discusses highlights from the Queensland Lipid Group's annual meeting held October 20-21, 2023, featuring presentations from leading international and local experts. The episode covers cutting-edge developments in cholesterol management, lipid disorders, inflammation, and cardiac imaging, with a focus on practical applications for reducing cardiovascular disease risk. This comprehensive overview aims to share key clinical insights and emerging treatment options with healthcare professionals and health-conscious listeners. Key Takeaways: Inclisiran is a novel RNA-based therapy that specifically targets liver cells to increase LDL receptors, lowering cholesterol levels with a convenient dosing schedule of two initial injections 90 days apart, then every six months. High-risk patients often fail to reach appropriate LDL cholesterol targets within a year after cardiac events, highlighting the persistent challenge of cholesterol management and medication adherence. LP(a) (lipoprotein(a)) is an emerging cardiovascular risk factor with genetic components; testing costs approximately $60 out of pocket and should be considered for individuals with significant family history of premature coronary artery disease. The omega-3 index, measurable through a $100 blood test, is a significant predictor of sudden cardiac death, making it a valuable assessment for those seeking to optimize heart health through dietary intervention. Colchicine, traditionally used for gout, shows promise in reducing cardiovascular events by dampening the inflammasome, a molecular complex central to inflammation pathways. Current evidence on dietary inflammation is limited and not well-established; weight reduction and calorie control remain the only interventions with robust scientific support. Coronary artery calcium scoring blurs the line between primary and secondary prevention, as a score of 400 indicates risk equivalent to someone who has already experienced a coronary event. Mental health conditions show significant associations with diet and inflammation, suggesting an important intersection between psychiatry and cardiovascular risk management that warrants further investigation. Read more

EP311: Fat Bellies and Skinny Brains

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: Fat Bellies and Skinny Brains Dr. Auric Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode featuring a discussion on research linking abdominal fat to reduced brain volume. The episode analyzes a September 2023 Medscape article by Megan Brooks about a large study of 10,000 healthy middle-aged adults that examined the relationship between visceral and subcutaneous abdominal fat and brain atrophy. The discussion emphasizes how excess weight, particularly around the abdomen, may negatively impact cognitive function and brain health. Key Takeaways: Both visceral fat (fat around organs) and subcutaneous fat (fat under the skin) are associated with reduced brain volumes, including grey matter, white matter, and critical regions like the hippocampus and frontal cortex. Women showed higher burdens of brain atrophy with increased visceral fat compared to men, though researchers note more research is needed to fully understand these sex differences. The research examined 10,000 adults aged 20-80 using MRI imaging to measure actual fat volumes rather than BMI, providing a more precise assessment of body fat distribution. While the study shows statistically significant relationships between abdominal fat and brain volume reduction, individual effect sizes are generally small, meaning the impact varies from person to person. The study is cross-sectional in nature, which prevents definitive conclusions about causality and whether increasing fat directly causes brain shrinkage. The research did not account for important lifestyle factors such as physical activity, diet, genetic variation, and blood pressure, which could influence the observed associations. Rising obesity rates in Western countries are correlated with increasing rates of heart disease, stroke, type 2 diabetes, and cancer, making weight management crucial for overall health. Multiple factors beyond weight contribute to cognitive decline and dementia risk, including education level, physical activity, sleep quality, mental health, and previous head injuries. The Alzheimer's Association is conducting the US Pointer trial to investigate whether combining physical activity, healthy nutrition, social engagement, and improved medical self-management can enhance cognitive function in at-risk older adults. Maintaining a healthy weight through regular exercise, good nutrition, and cognitive engagement appears important for protecting both heart health and brain health throughout life. Read more

EP310: Common Cardiac Drugs and Common Interactions

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. Warwick Bishop, a cardiologist, hosts this episode focused on common cardiac medications and their potential drug interactions. Dr. Auric Bishop provides context about the prevalence of heart disease in Australia, where a heart attack occurs every 20 minutes. The episode aims to educate listeners about how commonly prescribed heart medications work and, importantly, what interactions patients should be aware of when taking multiple drugs. Key Takeaways: Aspirin is widely used for both pain relief and blood thinning in coronary artery disease by reducing platelet stickiness, but should be taken with food or milk to minimize stomach upset from blocking prostaglandin protection. Combining aspirin with other blood-thinning drugs like clopidogrel or warfarin requires careful medical supervision due to increased bleeding risk. Warfarin's effectiveness is influenced by vitamin K intake from leafy greens and cruciferous vegetables, so consistency in dietary patterns is more important than complete avoidance. Many drugs interact with warfarin through liver metabolism, including antibiotics and anti-epileptic drugs, making it essential to inform your doctor of all medications. Proton pump inhibitors like omeprazole can theoretically reduce clopidogrel effectiveness, though clinical problems are rarely observed. Regular grapefruit juice consumption can dangerously increase blood levels of beta blockers, calcium channel blockers, and certain statins like atorvastatin and simvastatin. ACE inhibitors combined with potassium supplements or high-potassium salt substitutes can elevate potassium to dangerous levels, requiring regular kidney and potassium blood testing. Diuretics like frusemide cause potassium loss, which may need supplementation, especially when combined with ACE inhibitors that retain potassium. Sublingual GTN spray and nitrates can cause dangerous blood pressure drops when combined with phosphodiesterase inhibitors like Viagra, a critical interaction for emergency responders to know about. Amiodarone, used for heart rhythm problems, has complex drug interactions and should be taken on an empty stomach since high-fat meals increase its absorption and blood levels. Read more

EP309: 10 Commandments of Heart Health Explained

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 to address the epidemic of heart disease in Australia, where someone suffers a heart attack every 20 minutes. He presents the "Ten Commandments of Heart Health," key principles from his upcoming book designed to help people understand and manage their cardiovascular risk factors for better long-term health outcomes. Key Takeaways: Don't smoke; smoking is highly addictive (comparable to cocaine) but quitting is possible with proper support and motivation from loved ones. Exercise regularly for at least 20-30 minutes, three to five times per week—even brisk walking provides significant physical and mental health benefits, including reduced risk of heart attack, stroke, and dementia. Eat well and maintain a healthy weight by avoiding processed foods with additives and artificial sweeteners, which can have unexpected metabolic consequences; losing excess weight early prevents your body from adjusting to an unhealthy set point. Limit alcohol consumption; recent research shows no amount of alcohol is beneficial, and any consumption may increase blood pressure, atrial fibrillation risk, weight gain, and dementia risk. Keep blood pressure under control through regular monitoring, as high blood pressure increases risks of stroke, heart attack, atrial fibrillation, heart failure, kidney damage, and dementia. Manage diabetes risk by monitoring blood sugar and HbA1c levels, especially if overweight or with a family history of diabetes, as weight loss can prevent diabetes development. Know your precise cardiovascular risk by going beyond population-based risk calculators to actual arterial imaging (calcium scoring) to identify plaque in your specific arteries. Know your cholesterol level and act on it; use imaging combined with cholesterol management to make informed decisions about treatment and medication needs. Understand aspirin and heart medications; aspirin is not broadly indicated for intermediate-risk individuals but may be appropriate for those with high-risk imaging findings. Build a support team including family, friends, your GP, and specialists (cardiologist, exercise physiologist, psychologist) to sustain lifestyle changes and share knowledge with others for collective health improvement. Read more

EP308: Myocardial Bridging—a Bridge Too Far

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 to share insights from the Cardiac Society of Australia and New Zealand meeting held in Adelaide in August 2023. The episode focuses on helping people understand cardiovascular health conditions and prevention, with this particular installment exploring the lesser-known condition of myocardial bridges and its clinical significance. Key Takeaways: Myocardial bridges occur in up to 20% of the population, where coronary arteries run through the heart muscle rather than over its surface as is typical. Blood flow in coronary arteries occurs primarily during the diastolic (relaxation) phase of the cardiac cycle, as the high pressures during systole (contraction) prevent adequate blood flow. In rare cases, myocardial bridges can cause angina-like symptoms by compressing arteries significantly enough to restrict blood flow during both systole and parts of diastole. Myocardial bridging is one cause of MINOCA (Myocardial Ischemia with Non-Obstructive Coronary Arteries), a condition diagnosed when patients exhibit angina symptoms despite no visible coronary artery blockages. MINOCA can present in patients as young as 10 years old and as old as 70, making it a condition across a wide age range. CT coronary angiography and intravascular ultrasound are effective diagnostic tools; compression greater than 10% on intravascular ultrasound indicates the myocardial bridge is likely causing symptoms. Surgical de-roofing procedures, which remove the overlying muscle to free the artery, are the definitive treatment for symptomatic myocardial bridges. Stent placement is ineffective for myocardial bridges, and coronary artery bypass grafting is not necessary for this condition. Standard angina medications such as beta-blockers, calcium channel blockers, and nitrates can provide symptom relief for patients with myocardial bridges. Dr. Bishop's previous belief that myocardial bridges were clinically insignificant was challenged by this presentation, highlighting the importance of continued medical education and updated understanding of cardiac conditions. Read more

EP307: Long QT, Blood Pressure and Pregnancy

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 to share key learnings from the Cardiac Society Australia New Zealand annual scientific meeting held in Adelaide in August 2023. The episode covers three important cardiac topics: long QT syndrome, blood pressure management, and cardiac considerations during pregnancy, all aimed at helping Australians reduce their risk of heart disease. Key Takeaways: Long QT syndrome is a cardiac electrical condition where the QT interval (measured on an ECG between the Q wave and T wave) becomes prolonged, increasing the risk of sudden cardiac arrhythmia and sudden cardiac death, particularly in families with a history of the condition. Modern ECG machines can automatically detect prolonged QT intervals and adjust calculations for heart rate, making screening relatively simple and accessible for identifying at-risk patients. Stress testing and monitoring QT interval changes during recovery periods provide valuable insights into QT behavior, as the interval can fluctuate throughout the day and in response to life circumstances. Only 5% of home blood pressure machines in Australia are validated against a standard, raising serious questions about the reliability of many home blood pressure measurements used by patients. Only 32% (one-third) of Australian patients with high blood pressure have their condition adequately controlled, leaving 60% at increased risk of stroke, heart attack, atrial fibrillation, heart failure, kidney disease, and dementia. 24-hour ambulatory blood pressure monitoring is considered the gold standard for evaluating blood pressure control and understanding patterns like nighttime changes, stress-related spikes, and medication response. Mechanical heart valves in pregnant patients create complex management challenges because warfarin (the required anticoagulant) can cause fetal deformities, necessitating careful switching to low molecular weight heparin with anti-10A level monitoring. Pregnant women with cardiac conditions require coordinated care between cardiologists and obstetricians before conception to ensure the safest possible journey for both mother and baby. Read more

EP306: Inflammation, White Cells, Stroke and Salt

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Episode Summary Introduction Dr. Warrick Bishop is a cardiologist, author, keynote speaker, and CEO of the Healthy Heart Network dedicated to helping people live well for as long as possible. In this episode, Dr. Bishop shares insights from the Cardiac Society Australia New Zealand conference held in Adelaide in August, focusing on the relationship between inflammation and cardiovascular health, with emphasis on emerging research about how inflammation affects blood pressure and overall cardiac outcomes. Key Takeaways: White blood cells (lymphocytes and polymorphs) are found in artery walls of people with high blood pressure, suggesting a bidirectional relationship between inflammation and hypertension that researchers are still working to fully understand. High sensitivity C-reactive protein (HSCRP) levels directly correlate with blood pressure, with individuals in the highest inflammation quartile showing significantly higher blood pressure than those in the lowest quartile. Periodontitis (gum disease) is an easily measurable marker of inflammation, and intensive periodontal therapy can reduce blood pressure by 5-10 millimeters of mercury—equivalent to many blood pressure medications. Maintaining good oral hygiene and dental health is a practical, non-pharmaceutical intervention for managing blood pressure through inflammation reduction. Strokes can trigger autonomic nervous system changes that alter gut function, leading to dysbiosis and increased gut permeability, which allows bacteria to enter the bloodstream and causes serious infections within 24-48 hours post-stroke. High salt intake directly damages the gut microbiome before blood pressure increases, allowing inflammatory proteins (lipopolysaccharides) to leak through the intestinal lining and trigger systemic inflammation. Consuming adequate fiber can protect the gut lining integrity and mitigate some adverse effects of excessive salt intake on the cardiovascular system. Maintaining proper hydration helps counteract the negative effects of high salt consumption on the microbiome and vascular health. Read more

EP305: Syncope CSANZ 2023

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 to educate listeners about cardiovascular health and disease prevention. In this episode, he shares insights from a Cardiac Society of Australia and New Zealand scientific meeting, specifically focusing on a session about syncope (blackouts) and how to differentiate between cardiac-related, neurological, and other causes of loss of consciousness. Key Takeaways: Syncope refers to a temporary loss of consciousness and can have various causes, including cardiac issues, epileptic seizures, or rare conditions like brain bleeds or psychogenic episodes. Cardiac syncope may occur during physical exertion (suggesting valve narrowing) or at rest (suggesting arrhythmia), and typically presents with sudden onset and little to no warning. Orthostatic hypotension is a type of syncope triggered by standing up from a seated or lying position, often related to autonomic nervous system breakdown and exacerbated by prolonged standing, recent meals, or exercise. Vasovagal or reflex syncope occurs when the parasympathetic nervous system is over-triggered by emotional stress, unpleasant sights, smells, prolonged standing, or crowded environments, often with warning symptoms like feeling hot or nauseous. Epileptic seizures typically involve jerking movements (myoclonus) that begin at the onset of loss of consciousness, whereas syncope-related jerking occurs after consciousness is lost due to oxygen deprivation. Lateral tongue biting is more indicative of epilepsy, while tip-of-tongue biting or injury may result from cardiac syncope patients falling face-first and being injured. A detailed history is crucial for diagnosis, as patients often cannot recall events due to amnesia; information from witnesses or family members present during the episode is invaluable. Post-seizure confusion, incontinence, and fatigue are more commonly associated with epilepsy rather than cardiac syncope. Family history of sudden cardiac death and presence of structural heart disease increase the likelihood of cardiac causes of syncope. Accurate differentiation between syncope types requires careful consideration of prodromal symptoms, triggers, physical presentation, and circumstances surrounding the episode. Read more