EP390: Commotio Cordis and Nocturnal Leg Cramps

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: "EP390: Commotio Cordis and Nocturnal Leg Cramps" Dr. Auric Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode alongside Dr. Warwick Bishop to discuss two cardiac and muscular health conditions affecting Australians. The episode covers commotio cordis—a rare but life-threatening condition caused by blunt chest trauma—and nocturnal leg cramps, a much more common issue affecting up to 40% of adults over 50. Key Takeaways: Commotio cordis is a rare cause of sudden cardiac death in young athletes, occurring when blunt force trauma to the chest disrupts the heart's electrical rhythm and causes cardiac arrest. In the United States, only an estimated 10-20 cases of commotio cordis occur annually, though this may be under-reported; it predominantly affects males under 20 years old. Sports involving high-speed projectiles such as cricket, baseball, hockey, and lacrosse carry higher risk of commotio cordis, though chest protectors can reduce but not eliminate the risk. Automated external defibrillators (AEDs) at sporting venues are critical for commotio cordis survival, as accessing one within 180 seconds significantly improves survival chances and functional outcomes; beyond this window, brain damage risk increases substantially. Nocturnal leg cramps affect approximately 40% of adults over 50 and can be triggered by dehydration, electrolyte imbalances, poor circulation, nerve dysfunction, and certain medications including statins, diuretics, and beta blockers. The most evidence-supported treatment for nocturnal leg cramps is regular calf stretching before bed, performed with both straight and bent knees to target the gastrocnemius and soleus muscles for at least 30 seconds each. Magnesium supplementation may help reduce nocturnal leg cramps, though evidence is limited; vitamin K2 (menaquinone) shows promising recent research and may be beneficial when combined with vitamin D supplements. Patients experiencing leg cramps should review medications with their doctor, as certain drugs may be contributing to symptoms and could potentially be adjusted or changed.