Dr. Ethan Halm (image) UT Southwestern Medical Center Share Print E-Mail Caption Dr. Ethan Halm, new chief of the William T. and Gay F. Solomon Division of General Internal Medicine, helped identify several factors that can affect whether a patient dies or suffers a stroke after carotid-artery surgery. The procedure, one of the most common types of vascular surgeries performed in the US, involves opening the carotid artery in the neck and removing harmful plaque to restore blood flow to the brain. Credit UT Southwestern Medical Center Usage Restrictions Please use our credit line. 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.