@janegul I had a catheter ablation for. SVT 3 weeks ago. 3 hours, done completely under conscious sedation. The "conscious " part is a bit of a misnomer; I remember absolutely nothing! But my after-surgery report says I was "awake, alert and participated in the procedure." There was no leftover grogginess at all, I was in recovery about 20 minutes before they sent me back to my room. Home a few hours later, zero leftover anesthesia effects. After that experience, I'm no longer nervous about conscious anesthesia.