title: ECG Diagnosis: Hyperacute T Waves.
abstract: After QT prolongation, hyperacute T waves are the earliest-described electrocardiographic sign of acute ischemia, preceding ST-segment elevation. The principle entity to exclude is hyperkalemia-this T-wave morphology may be confused with the hyperacute T wave of early transmural myocardial infarction.
authors.affiliation: Senior Emergency Physician at the Santa Clara Medical Center, and Clinical Assistant Professor of Emergency Medicine (Surgery) at Stanford University. He is the Medical Director for the Foothill College Paramedic Program in Los Altos, CA. joel.levis@kp.org.
authors.forename: Joel T
authors.initials: JT
authors.lastname: Levis
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D053840:Brugada Syndrome; D000075224:Cardiac Conduction System Disease; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006329:Heart Conduction System / Q000002:abnormalities*; D006801:Humans; D006947:Hyperkalemia / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis*