Scientists Test How to Restart the Heart in Space: New Study

Why It Matters

Understanding how the circulatory system responds to CPR in microgravity is critical for astronaut safety on long‑duration missions, informing protocols that could save lives on the Moon, Mars and beyond.

Key Takeaways

• Concordia created a 3D‑printed heart mannequin for space CPR tests
• Blood pressures rose in hypogravity compared with 1 g during compressions
• Parabolic flights provided real microgravity data on circulation effectiveness
• Current model lacks spine and ribcage; upgrades planned for realism
• Goal: deploy the simulator on ISS to set emergency standards

Pulse Analysis

Spaceflight medicine has long grappled with the paradox of performing life‑saving procedures in an environment where the very physics of blood flow change. While prior studies examined whether an astronaut can generate adequate compression force without a stable floor, they offered little insight into how the patient’s circulatory system actually behaves. This knowledge gap hampers the development of evidence‑based protocols, leaving crews to rely on extrapolations from Earth‑based data that may be physiologically inaccurate.

The Concordia team’s "phantom patient" bridges that gap by integrating a 3D‑printed heart, valves and fluid‑filled vessels into a mannequin that can be subjected to true microgravity conditions. During parabolic flights, sensors recorded a consistent rise in systolic, diastolic, mean arterial and pulse pressures when gravity was reduced, indicating that the heart’s preload and afterload dynamics differ markedly from 1 g. These real‑time measurements go beyond simple compression depth metrics, offering a granular view of cerebral perfusion potential during resuscitation attempts in space.

Looking ahead, the researchers aim to enhance the model with a spine, ribcage and more sophisticated thoracic mechanics, then launch it to the International Space Station. An ISS‑based testbed would enable systematic evaluation of various CPR techniques, informing a gold‑standard emergency protocol for lunar habitats and future Mars missions. As commercial and governmental entities accelerate human presence beyond low Earth orbit, such validated medical guidelines become a strategic asset, reducing mission risk and safeguarding crew health.