BreathinG-induced Myocardial and Cerebral Perfusion in Anxiety Disorders

This study is investigating how breathing patterns affect blood flow to the heart and brain in people with anxiety disorders, using MRI scans. The goal is to better understand the physical effects of anxiety on the body, which could inform new treatment approaches. **You may be eligible if...** - You are between 18 and 55 years old - You have been identified as having an anxiety disorder OR you are a healthy volunteer - You are a non-smoker with no significant heart, lung, or neurological conditions **You may NOT be eligible if...** - You have a pacemaker, metal implants, or other MRI contraindications - You are pregnant - You have a history of significant neurological disease (beyond anxiety) - You have a history of claustrophobia or difficulty in confined spaces Talk to your doctor to see if this trial is right for you.