Sections View Full Chapter Figures Tables Videos Annotate 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||Download Slide (.ppt) ++ FIGURE 23.46B Deep, symmetrical, inverted T waves (arrowhead) with a prolonged QT interval. Graphic Jump LocationView Full Size||Download Slide (.ppt) Your Access profile is currently affiliated with [InstitutionA] and is in the process of switching affiliations to [InstitutionB]. Please select how you would like to proceed. Keep the current affiliation with [InstitutionA] and continue with the Access profile sign in process Switch affiliation to [InstitutionB] and continue with the Access profile sign in process Get Free Access Through Your Institution Learn how to see if your library subscribes to McGraw Hill Medical products. Subscribe: Institutional or Individual Sign In Error: Incorrect UserName or Password Username Error: Please enter User Name Password Error: Please enter Password Sign in Forgot Password? Forgot Username? Sign in via OpenAthens Sign in via Shibboleth You already have access! Please proceed to your institution's subscription. Create a free profile for additional features.