TNNI3 and subarachnoid hemorrhage: Electrocardiographic abnormalities like ventricular repolarization has been reported in subarachnoid hemorrhage. In a study of 100 patients with SAH, repolarization abnormalities occurred in 41% of patients, prolonged QTc interval >460 ms in 16%, ST segment elevation in 9%, ST depression in 3%, T wave inversion in 7%, and U wave >or=100 micro V in 15%. Serum cardiac troponin I was elevated in 21%, and was significantly associated with QTc interval >460 ms (P