OBJECTIVES This study investigated early electrocardiographic findings in relation to left ventricular (LV) function, extent and size of infarction, and microvascular injury in patients with acute myocardial infarction (MI) treated with percutaneous coronary intervention (PCI). BACKGROUND The electrocardiogram (ECG) is the most used and simplest clinical method to evaluate the risk for patien...

The electrocardiographic evidence of injury appears in the presence of evident diastolic depolarization due to an important reduction in blood supply or other non-ischemic causal factors. This in turn leads to a ‘‘defective’’ transmembrane action potential reflected upon the ECG tracing as an ST-segment deviation. When diastolic depolarization occurs at subendocardial level, an ST-segment desce...

To the Editor: The paper by Nielsen in the August 1973 issue of "Circulation"' on the prognostic importance of the ST segment elevation in acute myocardial infarction touches a point which has not been dealt with in the literature heretofore: the quantitative assessment of the ST segment elevation in the 12 lead standard ECG. The latter has been only qualitatively utilized in the diagnosis of m...

A 73-year-old man presented with severe postprandial epigastric pain that did not radiate. He had 6 episodes of emesis followed by retching. The character of the pain was different from past anginal symptoms. At his local emergency department, a chest roentgenogram revealed air presumably within a large intrathoracic hiatal hernia (Figure 1). Computed tomography was notable for the stomach bein...

The authors present the methods of ECG signal simulation especially ST-Elevation Myocardial Infarction known as STEMI. It occurs in the case of blood flow around and towards heart problem. It is strongly associated with a heart attack due to low level of oxygen transported to the heart muscle. The most common symptoms of this disease are chest pain, breath shortness or sweating. There are many ...

We have examined the relation between electrocardiographic ST elevation during treadmill exercise (greater than or equal to 1 mm, using the conventional 12 leads), the severity of coronary artery disease, and left ventricular wall motion abnormalities in 680 patients. They were divided into three groups: (1) 218 patients with clinically significant coronary artery disease, (2) 178 patients with...