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Parallax by Ankur KalraParallax (/parlaks/)-noun: the effect whereby Author: Radcliffe Cardiology
Parallax (/parlaks/)-noun: the effect whereby the position or direction of an object appears to differ when viewed from different positions. Join Ankur Kalra, MD as he shows you a different side to cardiovascular care, management and science. Listen to Ankurs conversations with legendary cardiologists, critical reviews of key congresses and late-breaking trials, and concise summaries. Published every second Monday of the month, this is your fix of reliable updates on all things cardiology by someone from a non-traditional background, who is always trying to look at it from new angles! Dear cardiologists, we want to make this podcast about you, and for you! Please email us critical thoughts, comments and questions for Ankur at podcast@radcliffe-group.com. Language: en Genres: Science Contact email: Get it Feed URL: Get it iTunes ID: Get it |
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Ep 156: Gravity, the Heart, and POTS: Space Cardiology's Unexpected Discoveries
Monday, 30 March, 2026
In this fascinating episode of Parallax, Dr Ankur Kalra is joined by Dr Benjamin Levine, Director of the Institute for Exercise and Environmental Medicine and a pioneering figure in the field of space cardiology. Together, they explore the remarkable cardiovascular adaptations that occur in microgravity, and what they are teaching clinicians about treating patients on Earth. Dr Levine unpacks the haemodynamic realities of spaceflight, from the counterintuitive finding that central venous pressure actually drops to zero in microgravity, to the physiologic cardiac atrophy that results when the heart no longer pumps against gravitational load. He shares how this research has transformed the understanding and treatment of POTS, reframing it not as a disorder of the autonomic nervous system, but as a consequence of reduced stroke volume - and how horizontal exercise training borrowed directly from astronaut countermeasure programmes is now changing clinical practice. The conversation also turns to the emerging cardiovascular risks of long-duration spaceflight, including earlier onset atrial fibrillation, upper body venous thrombosis, and the intracranial pressure dynamics underlying spaceflight-associated neuro-ocular syndrome. Dr Levine discusses the Astro-CHARM risk score, NASA's approach to coronary calcium screening, and the forthcoming scientific statement on cardiovascular management in tactical athletes. Questions and comments can be sent to podcast@radcliffe-group.com and may be answered by Ankur in the next episode. Host: @AnkurKalraMD and produced by: @RadcliffeCardio Parallax is Ranked in the Top 100 Health Science Podcasts (#48) by Million Podcasts.
