ST segment deviation (elevation, depression) is measured as the height difference (in millimeters) between the J point and the baseline (the PR segment). ST segment deviation occurs in a wide range of conditions, particularly acute myocardial ischemia.

2024年10月8日 · 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. The most important cause of ST segment abnormality (elevation or depression) is myocardial ischaemia or infarction.

2025年3月17日 · Acute ST-segment elevation on the electrocardiogram is one of the earliest signs of acute myocardial infarction, generally related to acute and complete coronary artery occlusion. To diagnose ST-segment elevation myocardial infarction (STEMI) this elevation must be persistent in at least two adjacent leads.

In electrocardiography, the ST segment connects the QRS complex and the T wave and has a duration of 0.005 to 0.150 sec (5 to 150 ms). It starts at the J point (junction between the QRS complex and ST segment) and ends at the beginning of the T wave.

STS 设计用来实现两个同步 三相交流电源 之间进行不间断（<8ms）转换。 两路交流电源的幅度、频率和相位差应控制在一定的范围内。 STS的主要作用是在 一路输入电源发生故障或需要检修、测试时实现从一路电源到另一路电源之间真正地不间断地转换,禁止接入两路会产生回流的输入电源。 STS可以通过 控制面板 设定其中任意一路输入电源为主电源，另一路输入电源为 备用电源。 只有在主电源故障或手动复位的情况下，STS才会自动在8ms内从主电源切换到 备用电源。 …

2020年11月14日 · 1998年4月22日，沪深交易所宣布，将对财务状况或其它状况出现异常的上市公司股票交易进行特别处理(Special treatment)，由于“特别处理”，在简称前冠以“ST”，因此这类股票称为ST股。所谓“财务状况异常”是指以下几种情况：(1)最近两个会计年度的审计结果 ...

2023年8月14日 · The ST segment encompasses the region between the end of ventricular depolarization and beginning of ventricular repolarization on the ECG. In other words, it corresponds to the area from the end of the QRS complex to the beginning of the T wave.

ST段延长：ST段正常时间为0.05～0.15s。 当其时间≥0.16s时，便称为ST段延长。 见于低钙血症、心内膜下心肌缺血、Q-T间期延长综合征、三度房室传导阻滞伴缓慢心室率、阿一斯综合征发作后等。 ST段缩短：当ST段时间<0.05s时，便称为ST段缩短。 ST段代表心室肌动作电位2相平台期，具有心率依赖性，受儿茶酚胺、细胞外钙离子浓度、心肌病变及药物等因素的影响。 凡是使用儿茶酚胺类及洋地黄类药物、高钙血症、心肌急性缺血、缺氧、损伤时致细胞膜受损引起钙离子 …

The ST segment elevation typically has a concave ST segment. ST segment depressions are seen in leads V5, V6, aVL and I. The hallmark of left bundle branch block is the wide QRS complex (QRS duration ≥0.12 s), deep S-wave in V1–V2, large and clumsy R …

The ST segment is the part of the ECG from the end of the QRS to the beginning of the T wave. The transition point from the QRS to the ST segment is called the J point. It usually appears isoelectric, but can be influenced by the presence of Ta …