What is the most common complication of TEE?

What is the most common complication of TEE, transesophageal echocardiogram, is mild sore throat, hoarseness, and difficulty swallowing due to irritation from probe passing through throat and esophagus, which occurs in many patients but is temporary and resolves within 24 to 48 hours. This sore throat is considered minor complication and is expected, managed with warm salt water gargle, lozenges, and soft foods. Other relatively common but minor side effects include gagging or nausea during probe insertion, mild dental or lip injury, and temporary drop in blood pressure or heart rate from sedation. More serious complications are rare, including esophageal tear or perforation, major bleeding, aspiration pneumonia, severe reaction to sedation, arrhythmias, and esophageal spasm, with overall major complication rate less than 1 percent, often less than 0.1 percent in experienced centers. Risk of serious complication increased in patients with esophageal disease, difficulty swallowing, prior chest radiation, or severe cervical spine problems. So while serious complications exist, most common complication is sore throat and mild throat discomfort that resolves quickly, making TEE considered safe diagnostic test with low risk when performed with proper monitoring and fasting.