EP198: Blackouts and Syncope

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 educating patients about heart health, believing that informed patients receive the best care. In this episode, Dr. Bishop provides a comprehensive overview of syncope (blackouts), explaining the various medical causes and sharing a successful clinical case study of a patient with vasovagal fainting. The episode emphasizes the importance of proper diagnosis and treatment for this common but potentially serious condition. Key Takeaways: Syncope is a medical term derived from a word meaning "pauses" and refers to blackouts or loss of consciousness that require proper medical evaluation. Blackouts can originate from three main sources: the brain (such as seizures), the heart (too fast or too slow), or blood pressure regulation issues. Seizure-related blackouts are typically characterized by warning signs (aura), violent shakes or tremors, and specific seizure patterns that distinguish them from cardiac causes. Cardiac causes of syncope include arrhythmias (heart racing) or conduction failures that cause sudden pauses, often resulting in sudden collapse. Orthostatic hypotension (blood pressure drops upon standing) is a common cause of blackouts, particularly when moving from resting to upright positions. Vasovagal syncope results from overactivity of the parasympathetic nervous system (rest and digest response) and presents as a "simple faint" triggered by emotional stress, blood, needles, or other specific stimuli. Dr. Bishop successfully treated a 70-year-old patient's decade-long fainting episodes using a two-pronged approach: beta blockers to dampen heart rate acceleration and anticholinergic agents (like BuskPam) to attenuate the parasympathetic response. Treatment strategies for vasovagal syncope should address both the initial rapid heart rate increase and subsequent dangerous slowdown using low-dose medications that carry minimal risk. Patients experiencing syncope should consult both their general practitioner and a cardiologist, as driving restrictions or exemptions may be necessary depending on the underlying cause. Syncope is a treatable and common condition, making proper diagnosis and intervention essential for patient safety and quality of life.