Laughing Gas Does Not Increase Heart Attacks in Surgery Patients (audio) Washington University School of Medicine Share Print E-Mail Loading audio... Caption Nitrous oxides commonly known as laughing gas. It's one of the oldest and most widely used anesthesia drugs in the world, but some also had thought it might be dangerous to use in patients at high risk for a heart attack. Now Washington University researchers have found that although it does cause levels of an amino acid in the blood to rise, nitrous oxide doesn't seem to affect heart attack risk. Jim Dryden reports... Credit Washington University BioMed Radio Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.