The ST segment is the flat, isoelectric section of the ECG between the end of the S wave (the J point) and the beginning of the T wave. The ST Segment represents the interval between ventricular depolarization and repolarization.

===== Case reports =====
Bhanot et al. presented a patient with [[intraparenchymal hemorrhage]] due to [[cerebral arteriovenous malformation]] (AVM) who exhibited acute [[ST segment]] [[myocardial infarction]] (STEMI) after neurosurgery. Serial cardiac biomarkers and [[echocardiogram]]s were performed which did not reveal any evidence of [[acute myocardial infarction]]. The patient was managed conservatively from cardiac stand point with no employment of [[anticoagulant]]s, [[antiplatelet therapy]], [[fibrinolytic]] agents, or [[angioplasty]] and recovered well with minimal neurological deficit. This case highlights that diffuse cardiac ischemic signs on the ECG can occur in the setting of an ICH after neurosurgery, potentially posing a difficult diagnostic and management conundrum
((Bhanot RD, Kaur J, Sriwastawa S, Bell K, Suchdev K. Postoperative 'STEMI' in [[Intracerebral Hemorrhage]] due to [[Arteriovenous Malformation]]: A [[Case Report]] and [[Review]] of [[Literature]]. Case Rep Crit Care. 2019 Apr 22;2019:9048239. doi: 10.1155/2019/9048239. PMID: 31231576; PMCID: PMC6507120.)).