Prognostic Value of Lead V ₁ ST Elevation During Acute Inferior Myocardial Infarction

Abstract

Occlusion-2 (HERO-2) trial, V 1 ST levels were analyzed with adjustment for lead V 3 ST level for predicting 30-day mortality. V 1 ST elevation at baseline, analyzed as a continuous variable, was associated with higher mortality. Unadjusted, each 0.5-mm-step increase in ST level above the isoelectric level was associated with Ϸ25% increase in 30-day mortality; this was true whether V 3 ST depression was present or not. The odds ratio for mortality was 1.21 (95% confidence interval, 1.07 to 1.37) after adjustment for inferolateral ST elevation and clinical factors and 1.24 (95% confidence interval, 1.09 to 1.40) if also adjusted for V 3 ST level. In contrast, lead V 1 ST depression was not associated with mortality after adjustment for V 3 ST level. V 1 ST elevation Ն1 mm, analyzed dichotomously in all patients, was associated with higher mortality.

Real Time Recognition of Heart Attack in a Smart Phone

“…In this project ST segments are identified by location of the R-peak. According to the information obtained from references ( 15 , 16 ) in 250 Hz sampling frequency, the ST segment appears after the end of the QRS complex in a 120 mS window with 30 sample lengths. This method makes it possible to achieve the ST segment in the application of real time processing.…”

“…ST segment elevation is one of the earliest signs of heart attack. According to reliable reports ( 15 , 16 ) when this piece is higher than 0.1 mV, it is called ST-elevation.…”

Chest pain followed by sudden collapse

“…6 Data from the Hirulog and Early Reperfusion or Occlusion-2 trial showed that ST segment elevation of 1 mm or greater in lead V 1 is associated with an increased risk of death in patients with acute inferior myocardial infarction. 7 Furthermore, the presence of ST-segment elevation in lead V 6 in patients with acute Q-wave inferior myocardial infarction, as evident in the first electrocardiogram, is associated with larger infarct size and a greater incidence of major arrhythmias. 8 ■ Determining the culprit vessel…”

Enhanced Automated Diagnosis of Coronary Artery Disease Using Features Extracted From QT Interval Time Series and ST–T Waveform

“…Clinically, the surface 12-lead electrocardiogram (ECG) test is still one of the most commonly used methods of the initial screening of CAD due to its nature of non-invasiveness, low cost, and timeliness [4], [5]. Certain morphologic ECG abnormalities, including T-wave inversion, abnormal Q-wave, and STsegment depression or elevation, have proved their clinical significance in risk stratification [6][7][8] and associations with myocardial ischemia and infarction [9][10][11][12][13][14]. However, these abnormalities are nonspecific symbols of CAD and can be observed in non-cardiac conditions, such as central nervous system diseases, hypothermia, and pulmonary embolism [15].…”