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: Climate Change and CVD and PFO at PD 2024

Introduction

Dr. Auric Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode with guest Warwick Bishop, who follows up on presentations from the Port Douglas medical conference. The episode focuses on two major topics: the cardiovascular impacts of climate change highlighted by renowned Mayo Clinic cardiologist Bernard Gersh, and patent foramen ovale (PFO) closure procedures, with Warwick sharing his personal experience of having a stroke caused by an undiagnosed PFO.

Key Takeaways:

• Climate change and environmental deterioration significantly impact cardiovascular health through increased inflammation and hypercoagulability, which accelerate atherosclerosis progression and increase heart attack and sudden death risk.

• Heat stress and temperature extremes negatively affect thermoregulation, particularly impacting patients with cardiac failure who experience worsening symptoms like swollen ankles and shortness of breath in hot conditions.

• Electrolyte imbalances from excessive sweating, increased respiration, and fluid loss during heat exposure can trigger dangerous cardiovascular complications.

• Micro-nanoplastics from air pollution accumulate in arterial plaques and are closely linked to worsening cardiovascular outcomes; these microplastics are now being found in human bodies and plaque development.

• Community-based secondhand smoke regulations in Pueblo, Colorado achieved a remarkable 30-40% reduction in heart attack risk, demonstrating how public health initiatives can dramatically reduce cardiovascular disease in populations.

• Noise pollution from increased urbanization, transport, and air traffic directly correlates with elevated blood pressure, a critical driver of heart attacks, strokes, atrial fibrillation, cardiac failure, renal failure, and dementia.

• Patent foramen ovale (PFO) occurs in approximately 25% of the population when a fetal heart opening fails to close properly after birth, potentially allowing blood clots to bypass the lungs' filtering action and cause strokes.

• PFO poses particular danger for divers (risk of decompression sickness) and anyone with venous blood clots, as these can cross through the opening into the arterial circulation and lodge in the brain or other organs.

• PFO closure is a minimally invasive, low-risk procedure performed via catheter through a leg vein, using umbrella-like devices to secure and close the opening, with high success rates despite a slightly increased risk of developing atrial fibrillation.