Heart Attacks are Preventable!

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

EP116: Cardiac Rehabilitation: Back To Exercise

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 Dr. Alistair Begg, a cardiac rehabilitation expert. The episode focuses on safely returning to normal activities and exercise after experiencing a heart event, addressing one of the most common questions patients ask their cardiologists. Key Takeaways: Recovery time after a heart event depends on two factors: the extent of damage to the heart muscle and the invasiveness of the intervention required to treat it. Patients who receive a stent with minimal heart damage may resume normal activities within days, while those who suffer significant heart attacks or require open-heart surgery typically need 4-6 weeks, or even longer than 6 weeks for full recovery. After bypass surgery, the sternum (breastbone) requires approximately 3 months to knit properly, and patients should avoid vigorous chest and arm movements during this healing period to prevent wound complications. Patients should always keep a pillow nearby after heart surgery to brace their chest when coughing or sneezing, as these involuntary actions can disrupt wound healing despite strong surgical wires holding the sternum together. The Borg scale—a perceived level of exertion measuring breathlessness on a scale of 1-10—should guide exercise intensity, with patients targeting a "moderately breathless" level of 6-7 rather than following fixed time or distance targets. Cardiac rehabilitation should combine aerobic exercise (walking, cycling) with muscle-strengthening activities, as hospitalization and surgery cause significant muscle weakness that medications like statins can further exacerbate. Patients should choose exercise routines they enjoy and can easily fit into their daily lives, as adherence is crucial for long-term success. Heavy weightlifting and strenuous activities that significantly elevate blood pressure should be avoided during the first 6 weeks of recovery. Regular exercise is as effective as first-line antidepressant medications for improving mood, making it psychologically beneficial beyond its physical health benefits. Read more

EP115: Misunderstanding, Misinterpretation, Mismanagement, and Misfortune

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 patient education about heart health. In this episode, he discusses a real case involving a patient named Trevor, a 69-year-old man whose shortness of breath led to cardiac imaging that revealed high-risk coronary artery disease features. The episode illustrates how misinterpretation of imaging results and poor communication between healthcare providers can lead to dangerous undertreatment. Key Takeaways: Treadmill stress tests are functional tests that show how well the heart works under stress, but they don't reveal the anatomical condition of arteries or plaque buildup. CT scans provide anatomical detail about coronary artery health and can reveal both calcified plaque and soft (non-calcific) plaque that may not be apparent from calcium scores alone. A low calcium score doesn't guarantee low risk—some patients have significant soft plaque without much calcium, which can be equally or more dangerous. The C-plus algorithm combines multiple factors (calcium score, plaque burden, plaque characteristics, remodeling, and stenosis) to provide a comprehensive risk assessment that goes beyond calcium score alone. Trevor had a calcium score in the 20th percentile (seemingly low-risk) but actually had very high-risk features including substantial soft plaque and stenosis, with greater than 50% risk of heart attack in the next decade. Patient misunderstanding of test results, combined with casual reassurance from a GP unfamiliar with complex imaging interpretation, led Trevor to stop taking prescribed high-intensity cholesterol medication. Specialists and GPs must communicate directly with patients about medication changes rather than relying on patients to self-interpret test results or make independent decisions. When medication causes side effects, patients should work with their specialist to find the maximum tolerable dose rather than stopping treatment entirely without medical guidance. Patients should always return to their prescribing specialist before making changes to recommended treatment plans, even if seeking a second opinion from their GP. Effective cardiac risk management requires collaborative communication between patient, GP, and specialist to ensure proper understanding and adherence to potentially life-saving therapies. Read more

EP114: Blood Pressure, Stress, And Looking After Your 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 is a practicing cardiologist and author dedicated to improving patient care through heart health education. In this episode, he addresses audience questions about the mechanisms behind cardiovascular disease, including blood pressure's role in cholesterol deposition, the effects of stress and depression on heart health, and age-related aortic stiffening. Key Takeaways: Blood pressure doesn't directly "squeeze" cholesterol into artery walls; rather, cholesterol travels in protein capsules (lipoproteins) because it doesn't dissolve in water. High blood pressure causes wear and tear on the inner lining of arteries through friction, triggering a repair response that draws cholesterol to damaged areas. Depression and anxiety are significant risk factors for heart disease, operating through multiple mechanisms including elevated stress hormones (adrenaline and cortisol), poor sleep, unhealthy behaviors (smoking, poor diet, sedentary lifestyle), and increased blood pressure. Takotsubo cardiomyopathy is a condition where emotional stress causes temporary heart dysfunction that mimics a heart attack, demonstrating the direct nervous system effects on cardiac function. As people age, the aorta loses elastic tissue and becomes stiffer, reducing its ability to absorb pressure spikes from heart contractions. In elderly patients, aortic stiffness leads to isolated systolic hypertension, characterized by elevated systolic pressure but lower diastolic pressure due to loss of elastic recoil. Maintaining low blood pressure throughout life is the most effective strategy to prevent aortic wear and tear and preserve elastic tissue. ACE inhibitors and angiotensin II receptor blockers may help preserve arterial elastin by reducing enzymes that break down elastic tissue. Read more

EP113: Not Realising How Sick You Are Until You Are Well

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 patient educator who hosts this podcast to help people understand heart health through the Healthy Heart Network. In this episode, Dr. Bishop shares the compelling story of Brian, a 65-year-old patient who had suffered a heart attack ten years prior but had completely lost contact with medical care, illustrating the critical importance of cardiac follow-up and rehabilitation after a cardiac event. Key Takeaways: Being "lost to follow-up" after a heart attack can significantly compromise long-term heart health outcomes, as demonstrated by Brian's decade-long absence from medical care. Patient anger and resistance during medical consultations often masks underlying fear rather than genuine dislike of doctors; addressing the root emotion can transform the therapeutic relationship. Direct, empathetic communication that acknowledges patient concerns and sets clear boundaries can help reluctant patients engage meaningfully in their own care. Comprehensive cardiac rehabilitation involves systematic medication management, symptom reduction, functional restoration, and ensuring patients understand their treatment plan. Prioritizing medication recommendations helps GPs implement changes effectively by focusing on interventions that provide the greatest benefit first. Spending extra time with "lost to follow-up" patients to create detailed action plans and establish strong GP relationships increases the likelihood of continuity of care. Guidelines and medications for cardiac care change regularly, making periodic cardiologist consultations essential to optimize treatment and catch needed adjustments. Small medication adjustments or lifestyle modifications can sometimes produce major improvements in symptoms and quality of life for cardiac patients. Patient education about the purpose of follow-up care and the physician's genuine desire to help can shift patient attitudes and improve compliance. Proactive patient engagement with their healthcare team, rather than avoidance, is the key to preventing complications and improving outcomes after cardiac events. Read more