V2～4,V5～6这三个区域中,有一区域的QTrd>40 ms,则心肌扩张引起缺血的可能性大,如这三个区域中的QTrd都小于40 ms,可能为冠状动脉病变引起心肌缺血的表现.%Objective:To analyze whether regional QTrd could be an index to identify ST segment changes caused by dilated cardiomyopathy or ischemic ...
Methods According la the rhan- 5CS of ST segment in ECG and coronary arfpriongraphy 98 caeae were divided into three groups: coronary heart distiase C) group, hypertension wilh coronary heart disease ( CU ) group and hypertension ( II ) group. QTrd was mpasuned and compared in four 5...
BACKGROUND: Short QT syndrome (SQTS), a disorder associated with characteristic ECG QT-segment abbreviation, predisposes affected patients to sudden cardiac death. Despite some progress in assessing the organ-level pathophysiology and genetic changes of the disorder, the understanding of the human cellul...
ST-segment depression by >1.0 mm 0.08 second after J-point during or after exercise in exercise test and >50% stanosis of epicardial artery in coronary angiogram were defined as positive. Of 106 patients, 41 had positive exercise ECG and positive coronary angiogram(true positive, TP), 20 ...
Autonomic nervous system influences also electrophysiologic heart proceses, which is reflected in the electrocardiogram, especially in the form of ST - T segment and length of QT interval. The aim of this study was to estimate QT interval and ST - T complex in twenty-four-hour ECG Holter ...
In addition, the points above and below the cloud are erratic and are not consecutive to abrupt RR changes. Since it was difficult to establish a clear relation- ship between QT and RR during nocturnal period, we analyzed the ECG during the diurnal period, when the HR is expected to slow...
In addition to a short QT interval, the resting 12-lead ECG typically reveals an abbreviated or even absent ST segment, and often tall, peaked, and symmetrical T waves in the precordial leads. U waves are usually small or not discernable (see Figure 7.11A).Paroxysmal AF is commonly observe...
Prolongation of the ventricular action potential is recognized non-invasively by QT segment prolongation on the ECG (a useful but tricky surrogate end-point for risk of clinically important. 机译:托克雷(Torquere)是拉丁文,意为“扭曲”,英文为“ torque”,法语为“扭转”为“扭曲的条纹,绳索或缎带”...
Four cardiologists each measured QT and RR in a random sample of 44 subjects selected from a larger database of 24-hour, continuously recorded, 12- lead electrocardiograms (ECG) previously analyzed for ST-segment deviation. Seven pre- specified time points related to ST deviation were utilized....
方法受检者取左侧卧位,连接心电图(ECG),将左室心肌分为六个心壁,分别为前壁(LVAV)、下壁(LWVO、后间隔(PS)、侧壁(LVLW)、前间隔(As)、后壁(LVPW)。每一个心室壁又分为左室基底段(Bas)、中间段(Mid)、心尖段(Apex)。常规在M型及二维条件下测量计算反映左室负荷状态下有关舒张功能情况的参数(包括...