Heart Attacks are Preventable!

EP126: Major Trial Changes in Cardiology Thinking

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 passionate educator dedicated to helping patients understand their heart health through evidence-based information. In this episode, Dr. Bishop discusses the recently released ISCHEMIA Trial, a landmark cardiology study that challenges conventional approaches to treating stable coronary artery disease. The trial's findings have significant implications for how cardiologists decide between invasive stenting procedures and conservative medical management strategies. Key Takeaways The ISCHEMIA Trial is a landmark, double-blind randomized controlled trial involving over 5,000 patients that compared early interventional stenting strategy versus optimal medical therapy in stable patients with moderate to high-risk coronary artery narrowings. The trial's primary finding shows that major adverse cardiac events (MACE) outcomes were essentially equivalent between the early intervention group and the optimal medical therapy group after 3.5 years of follow-up. Optimal medical therapy includes aggressive cholesterol management, aspirin therapy, blood pressure control, and lifestyle modifications including diet and exercise—often without the need for stent placement in stable patients. The ISCHEMIA Trial was designed to validate earlier findings from the BARRY 2 and COURAGE trials, which suggested stable patients could be effectively managed conservatively rather than immediately undergoing stenting procedures. The trial excluded patients with left main coronary artery disease, as these individuals represent genuinely high-risk cases that require intervention and would have skewed the results. While early intervention resulted in fewer symptoms at one year, the placebo-controlled ORBITER Trial demonstrated that sham procedures produced nearly equivalent symptom reduction, highlighting the power of placebo effect in symptom improvement. The trial should reduce unnecessary stenting procedures performed by interventional cardiologists and encourage more thoughtful, individualized conversations between doctors and patients about the actual need for intervention. Factors influencing whether a patient should pursue early intervention include patient age (younger patients may benefit more), symptom severity, medication compliance, amount of at-risk heart muscle, and plaque location. Dr. Bishop's clinical practice already incorporates conservative management strategies, using CT coronary angiography and periodic stress testing to monitor stable patients on optimal medical therapy rather than immediately recommending stents. Read more

EP125: Why Stent Or Bypass?

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 colleague and cardiac rehabilitation specialist based in Adelaide. Together, they discuss the critical decision between stent placement and bypass grafting, addressing the common patient question of which intervention is appropriate for their individual situation. Key Takeaways In acute heart attack situations, the priority is to open the blocked artery as quickly as possible using either stent placement or clot-busting medications, as "time is muscle" when it comes to saving heart tissue. Patients typically present in two ways: emergently with acute chest pain and heart attack symptoms, or in a controlled setting after noticing decreased exercise capacity, with the latter scenario allowing for more preventative management. Initial evaluation of suspected heart disease involves detailed history-taking, physical examination, an electrocardiogram (ECG), and functional testing such as exercise stress tests to assess the heart's response to exertion. Anatomical imaging through coronary angiography (injecting dye into the arteries) combined with functional test results guides the choice between medical management, stenting, or bypass grafting. Stent placement is generally preferred for discrete lesions affecting one or two arteries in non-diabetic patients with normal heart function, as it is less invasive than surgery. Bypass grafting is typically recommended for extensive, widespread disease, diabetic patients, those with impaired heart function, or when lesions cannot be accessed with stents. Recent EXCEL trial results show that stenting of the left main coronary artery (historically considered only suitable for surgery) is becoming increasingly viable as technology improves. Multiple factors—both technical characteristics of the blockages and individual patient characteristics—determine whether stenting or bypass is the most appropriate treatment strategy. Medical management, including blood thinners and cholesterol-lowering medications, is a component of treatment regardless of which intervention is chosen. As stent technology continues to advance, indications for stent use are expanding, making the decision between stenting and bypass increasingly individualized to each patient's anatomy and clinical situation. Read more

EP124: What Could Have Happened If...

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, presents a compelling case study titled "What Could Have Happened If," highlighting the critical importance of proper cardiac risk assessment. The episode tells the story of Conrad, a 54-year-old man whose wife Donna's insistence on comprehensive cardiac imaging led to two life-saving diagnoses that standard stress testing had missed. Key Takeaways: Stress tests in asymptomatic patients often yield low-yield results and may provide false reassurance when normal, as they only detect current blockages rather than assessing arterial health and future risk. Cardiac CT imaging allows direct visualization of artery health and plaque burden, providing superior risk stratification compared to stress testing, and is recommended in preventative guidelines by the European and American societies but not yet in Australia. Conrad's stress echocardiogram appeared normal but missed significant bilateral pulmonary embolism (blood clots in both lungs) that was only discovered through cardiac CT imaging during contrast injection. Women often serve as primary drivers of preventative health measures in partnerships, while men tend to neglect preventative health despite their willingness to maintain equipment like outboard motors. Cardiac CT imaging carries a radiation dose equivalent to a mammogram, which Dr. Bishop considers reasonable for a preventative screening strategy in a high-risk population. Dr. Bishop uses a two-stage cardiac CT protocol: first scanning without contrast to detect calcium, then injecting contrast only if abnormalities are present, minimizing unnecessary radiation exposure. Conrad's coronary arteries showed no focal narrowing or blockages (consistent with the stress echo) but displayed extensive non-calcific plaque with arterial remodeling, indicating very high risk over 5-10 years despite the normal stress test. Family history of clotting disorders in Conrad's mother and brother raised suspicion of inherited thrombophilia that contributed to his pulmonary embolism. Following diagnosis, Conrad's treatment intensified significantly, including aggressive LDL cholesterol reduction to less than 1.4 mmol/L (below current European Society of Cardiology guidelines), blood pressure management, weight loss, and lifelong anticoagulation. Without Donna's proactive advocacy for comprehensive imaging, Conrad would likely have remained falsely reassured by his normal stress test while facing two potentially fatal conditions. Read more

EP123: Talking About Food

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 focused on demystifying healthy eating and nutrition guidance. The episode tackles the widespread confusion caused by conflicting dietary messages in the media, such as changing recommendations about eggs and dairy from major health organizations. Dr. Bishop argues for a personalized approach to nutrition rather than seeking a universal "best diet" for everyone. Key Takeaways: There is no one-size-fits-all "best diet" because nutritional needs vary significantly based on age, activity level, health status, and individual goals. Dietary guidelines should be personalized based on each individual's specific eating objectives rather than applying general principles universally to all populations. Low-fat food products often contain significantly higher sugar content than their full-fat alternatives, which may be counterproductive for long-term health. Mediterranean-style diets rich in leafy greens, olive oil, nuts, and fish have been shown to reduce coronary events even without lowering cholesterol levels. Focusing on broad principles—such as limiting sugars and refined carbohydrates, consuming healthy fats, eating plenty of vegetables, and including quality proteins—is more practical than chasing individual "superfood" headlines. Single foods or nutrients have complex biological pathways to reach their intended targets in the body, making isolated nutrient claims oversimplified and unreliable. A comprehensive health approach should include sensible eating aligned with personal objectives, regular exercise, stress management (such as yoga), and regular medical checkups. Media sensationalism around individual foods (like "blueberries are good" or "eggs are bad") often oversimplifies nutrition science and creates unnecessary confusion. Read more

EP122: What Is SVT?

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 supraventricular tachycardia (SVT), breaking down the medical terminology and explaining the different types of this rapid heartbeat condition that originates above the heart's main pumping chambers. Key Takeaways: Supraventricular tachycardia (SVT) is defined as a fast heartbeat originating in the atria (chambers above the main pumping chambers), with "supra" meaning above, "tachy" meaning fast, and "cardia" meaning heart. Atrial fibrillation is an irregular type of SVT where the atria lose synchronicity and fibrillate, but it is typically discussed as a separate condition from regular SVTs. Regular SVTs are caused by short circuits in the heart's electrical pathway that create feedback loops, and the length of these loops determines how fast the heart beats. Atrial flutter is a specific SVT with a short circuit loop near the tricuspid valve that typically produces a heart rate of around 150 beats per minute with a characteristic "sawtooth" ECG pattern. Paroxysmal SVT (PSVT) with nodal reentry involves a short circuit near the atrioventricular node and can cause heart rates of 160-190+ beats per minute, often seen in young patients. Wolff-Parkinson-White syndrome involves an accessory muscular pathway between the atrium and ventricle that bypasses the normal electrical pathway and can create dangerous short circuits. Valsalva maneuvers (holding breath while standing, then squatting) can help revert PSVT by temporarily altering blood flow and atrial distension. Treatment options range from observation for infrequent episodes to medication (adenosine or tablets) to electrophysiological ablation, where physicians use catheters to burn and disrupt the abnormal electrical circuits. Atrial flutter often doesn't respond well to medication, making ablation a more common treatment option for this condition. Wolff-Parkinson-White patients should be considered early for electrophysiological ablation to remove the accessory pathway, especially to prevent complications if atrial fibrillation develops later in life. Read more

EP121: Cardiac Rehabilitation With Dr. Alistair Begg Part 3

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 passionate health educator, hosts this episode featuring Dr. Alistair Begg, a cardiologist from Adelaide specializing in cardiac rehabilitation. The episode focuses on blood pressure management and diabetes as critical risk factors in cardiac rehabilitation, exploring how these conditions affect heart health and discussing emerging treatment approaches. Key Takeaways: Cardiac rehabilitation is a holistic, patient-centered journey that aims to identify the causes of cardiac events and guide patients toward optimal long-term health through education and lifestyle modification. Blood pressure is the single biggest treatable risk factor for cardiovascular disease, with target levels typically around 130/80 mmHg, or 120/70 mmHg for younger patients without diabetes. Office blood pressure measurements often inaccurately reflect a patient's true blood pressure due to "white coat syndrome," making out-of-office measurements and 24-hour blood pressure monitors essential for accurate assessment. High blood pressure causes structural changes to the heart and significantly increases the risk of atrial fibrillation and heart failure, which have now become the leading causes of cardiac hospitalization, surpassing heart attacks. Diabetes is a serious cardiovascular risk factor that makes heart disease harder to treat, leads to more complications, and results in worse outcomes compared to non-diabetic patients. Prevention of diabetes through weight management, regular physical activity, and healthy diet is critical, and blood sugar should be monitored regularly by healthcare providers. Sodium-glucose transport inhibitors (SGLT2 inhibitors) are an exciting new class of drugs that prevent kidney reabsorption of glucose and have shown remarkable benefits in preventing heart failure and improving outcomes in both diabetic and non-diabetic patients. The DAPA-HF trial demonstrated that SGLT2 inhibitors provide equal cardiac benefits for both diabetic and non-diabetic patients with heart failure, opening new therapeutic frontiers in cardiology. Clinical experience with SGLT2 inhibitors has been very favorable, with patients experiencing fewer hospital visits and improved cardiac function beyond what the evidence base alone would suggest. Read more

EP120: Cardiac Rehabilitation With Dr. Alistair Begg 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 Episode Summary Introduction Dr. Warrick Bishop, a practicing cardiologist and patient education advocate, hosts this episode featuring Dr. Alistair Begg, a specialist cardiologist from Adelaide with expertise in cardiac rehabilitation. The discussion focuses on cardiac rehabilitation—the comprehensive journey patients undertake after cardiac events like heart attacks, surgeries, or stents—and the modifiable and non-modifiable risk factors that contribute to heart disease. Key Takeaways: Cardiac rehabilitation is a structured process that helps patients recover after cardiac events by identifying why the event occurred and implementing strategies to prevent future occurrences. Family history is a critical non-modifiable risk factor; having one parent with early-onset heart disease (under 55-65 years) can double a patient's risk, while two affected parents can increase risk four-fold. Significant family history should focus on first-degree relatives (parents, siblings) with cardiac events before age 55 for men and 60 for women, not distant relatives who had events at advanced ages. Smoking is a major modifiable risk factor; physician advice to quit, combined with programs like Quitline and nicotine replacement therapy, can profoundly reduce cardiac risk. Patient readiness for change is crucial; establishing a strong therapeutic relationship allows physicians to work on modifiable risk factors even if patients initially resist change on particular issues like smoking. Approximately two-thirds of adults are overweight or obese, and weight management requires a personalized approach addressing individual drivers such as diet and exercise patterns rather than one-size-fits-all solutions. The recommended exercise guideline is 30 minutes daily for at least five days per week at a moderate intensity level where patients become somewhat breathless. Exercise provides mental health benefits equivalent to antidepressant medication, which is important since depression is linked to coronary disease risk. For weight management, interventional approaches such as gastric surgery or weight-loss medications may be considered when conventional methods prove unsuccessful. General practitioners play an important role in cardiac rehabilitation by regularly coaching patients and supporting implementation of risk factor modifications. Read more

EP119: Cardiac Rehabilitation With Dr. Alistair Begg 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 of the Healthy Heart Network to discuss cardiac rehabilitation with his colleague Dr. Alistair Begg, a senior cardiologist from Adelaide with over 15-20 years of specialized experience in cardiac rehabilitation. The episode explores what cardiac rehabilitation is, its importance for patients recovering from heart events, and how it can improve long-term health outcomes. Key Takeaways: Cardiac rehabilitation is a comprehensive, coordinated process involving physical, mental, and social conditioning that helps patients recover fully after a cardiac event such as heart attack, stent placement, or heart surgery. The British Association for Cardiovascular Prevention and Rehabilitation defines rehabilitation as the sum of activities required to favorably influence the underlying cause of cardiovascular disease while providing optimal physical, mental, and social conditions for patients to preserve or resume functioning. Cardiologists are uniquely positioned to coordinate cardiac rehabilitation because they provide acute treatment and can supervise the longer-term recovery process while educating patients and coordinating care from multiple health professionals including dietitians, exercise specialists, and mental health professionals. Identifying and addressing cardiac risk factors—both inherited factors like family history and modifiable factors such as high blood pressure, diabetes, smoking, lack of exercise, and poor diet—is fundamental to an effective rehabilitation program. Education and patient empowerment are critical ingredients for rehabilitation success; informed patients are more likely to avoid future cardiac complications and achieve better quality and quantity of life. Patients are significantly more receptive to lifestyle and behavioral changes immediately following a cardiac event, making post-event rehabilitation an optimal window for instilling long-term health habits. Evidence demonstrates that patients who complete cardiac rehabilitation programs experience fewer future cardiac events and report better overall quality of life compared to those who do not participate. The Heart Foundation of Australia prioritizes cardiac rehabilitation because patients who have suffered one cardiac event are at highest risk for subsequent events, making rehabilitation a critical intervention opportunity. Read more

EP118: The COVID-19 Situation

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 education about heart health. In this episode, he provides a comprehensive overview of the COVID-19 pandemic, explaining the virus's origins, transmission, risk factors, and practical safety measures during the early stages of the global outbreak. Key Takeaways: COVID-19 (SARS-CoV-2) is a coronavirus related to the 2002 SARS outbreak, but spreads more efficiently while having a less severe prognosis than SARS. Unlike influenza, there is no community-based immunity to COVID-19, allowing it to spread rapidly through populations with no prior exposure. COVID-19 has approximately a 1% death rate, which is 10 times higher than the seasonal influenza death rate of about 0.1%. The virus can be transmitted human-to-human, through contaminated surfaces, and asymptomatically by carriers including children who show no symptoms. Symptoms can take up to 14 days to appear after exposure, making early detection difficult. Elderly individuals over 80 years old have a death rate of 10-15%, significantly higher than the general population, while children under 10 have experienced no fatalities. No antiviral treatment or vaccine exists; current management relies on supportive care, particularly ICU ventilation for severe cases. There is uncertainty regarding ACE inhibitor medications and COVID-19 severity, but discontinuing them without clear evidence is not recommended without consulting a doctor. Particulate masks (P2 and N95) may offer some protection if properly fitted, particularly in high-exposure situations. High-risk groups include elderly individuals (especially over 80), immunosuppressed patients, and those with comorbidities such as diabetes, renal disease, lung disease, and smokers. Read more

EP117: European Society of Cardiology Meeting Paris

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 discusses several groundbreaking trials and findings presented at the recent European Society of Cardiology meeting in Paris, including major advances in heart failure treatment and coronary artery disease management. Key Takeaways: The DAPA-HF trial demonstrated that dapagliflozin (a sodium-glucose transport inhibitor) reduces cardiovascular death and heart failure events by over 25%, with equal benefits in both diabetic and non-diabetic patients, marking a paradigm shift in heart failure management. SGLT2 inhibitors, originally developed for diabetes control, show significant cardiac benefits through mechanisms beyond glucose management, likely involving fluid balance and chemical messengers in the body. The Paragon HF trial showed that combination therapy with Entresto did not produce clinically significant improvements for patients with preserved ejection fraction heart failure, leaving this patient population without new treatment options. The COMPLETE trial revealed that addressing non-culprit coronary lesions (moderate to severe narrowings) at the time of acute coronary syndrome treatment reduces death and revascularization events by 25-50%. High sensitivity troponin testing safely identifies low-risk patients who can be discharged from emergency departments without heart damage, based on a study of approximately 20,000 patients. The THEMIS trial confirmed that dual antiplatelet therapy reduces recurrent cardiac events but increases bleeding risk, requiring careful patient-by-patient risk-benefit analysis for continuation beyond standard duration. New European lipid guidelines recommend lowering LDL cholesterol targets to 1.4 millimoles per liter (55 mg/dL) for very high-risk patients, and to 1.0 millimole per liter (40 mg/dL) for those who fail standard therapy, achievable primarily through PCSK9 inhibitors. Supplemental oxygen provides no benefit for acute coronary syndrome patients with adequate oxygen saturation, though it remains necessary for those with low oxygen levels. Read more