What’s the difference between global vs. regional hypoperfusion? 🌍🧠 * Global hypoperfusion means the brain as a whole isn’t getting enough blood flow — think systemic, like low cardiac output or severe blood pressure drops. * Regional hypoperfusion means only a specific area of the brain is affected — one artery, one zone, one “region” under stress. The way I measure this is by looking at the middle cerebral artery 🧬 through a transcranial Doppler window. That gives me insight into blood flow