Sections View Full Chapter Figures Tables Videos Full Chapter Figures Tables Videos Supplementary Content +++ ECG Findings ++ Inverted, deep, and wide T waves are most notable in precordial leads (can be seen in any lead). QT interval prolongation. ST segment changes are variable. High-amplitude R waves. Arrhythmias may also occur in the setting of acute cerebral emergencies. +++ Pearls ++ These ECG changes are associated with increased intracranial pressure. Cerebral T waves resolve spontaneously, but can persist up to 6 weeks. Suspect increased intracranial pressure in patient presenting with altered mental status and the perviously mentioned ECG changes. ++ FIGURE 23.46A Cerebral T Waves. This ECG was obtained on a patient with a severe acute hemorrhagic cerebrovascular accident. (ECG contributor: James V. Ritchie, MD.) Graphic Jump LocationView Full Size|Favorite Figure|Download Slide (.ppt) ++ FIGURE 23.46B Deep, symmetrical, inverted T waves (arrowhead) with a prolonged QT interval. Graphic Jump LocationView Full Size|Favorite Figure|Download Slide (.ppt) GET ACCESS TO THIS RESOURCE Sign In Username Error: Please enter User Name Password Error: Please enter Password Forgot Username? Forgot Password? Sign in via OpenAthens Sign in via Shibboleth Get Free Access Through Your Institution Contact your institution's library to ask if they subscribe to McGraw-Hill Medical Products. Access My Subscription GET ACCESS TO THIS RESOURCE Subscription Options Pay Per View Timed Access to all of AccessEmergency Medicine 24 Hour $34.95 (USD) Buy Now 48 Hour $54.95 (USD) Buy Now Best Value AccessEmergency Medicine Full Site: One-Year Individual Subscription $595 USD Buy Now View All Subscription Options