In our study, ST segment
elevation in precordial leads with reciprocal ST depression of >1 mm in inferior leads was seen among 155 (77.
ECG revealed ST segment
elevation in leads D1, D2, aVL, aVF, V3, V4, V5, and V6 (Figure 1).
Acute ischemia that is typically a consequence of coronary artery occlusion is associated with ST segment
elevation on ECG leads, whose positive poles are located over the ischemic region and with reciprocal ST depression in leads whose positive poles are oriented in the opposite direction .
Graph 1: ST Segment
Pattern Among 50 IHD Cases ST segment
pattern ST elevation 58% ST depression 26% ST iso-electric 16% Note: Table made from pie chart.
Cardiac biomarkers were negative and after 7 days the ECG abnormalities (horizontal ST segment
depression and T-wave inversion in inferior and lateral leads) have disappeared (Figure 4).
Complications were higher in patients with elevated ST segments
in V4R (51%) in contrast to those without RVI (21%).
The parameters analysed were: the clinical features (chest pain, breathlessness) and demographics of the sample population, the onset of ST depression, the magnitude and type of ST segment
depression in relation to disease, the time to ST segment
recovery in relation to true positive (TP) test versus false positive (FP) test, the total duration of ST segment
depression during exercise and recovery (total ischemic time (TIT)) of TP in relation to FP tests, the double product and analysis of time course recovery patterns in TP in relation to FP tests.
Alternatively, a decrease in vagal tone during anaesthesia may have been responsible for these changes, although after checking the athletes previous exercise stress test, the ST segment
changes noted during anaesthesia were not present while exercising.
These combined effects result in a decrease in coronary perfusion and an increase in oxygen consumption," conceivably leading to myocardial injury as evidenced by elevated serum cardiac troponin or EKG ST segment
change, explained Dr.
As per the American College of Cardiology (ACC)/the American Heart Association's (AHA) 2004 Guidelines (20) for ST segment
elevation, the goal is to keep total ischaemic time within 120 min.
A heart attack with an elevated ST segment
, which shows a noticeable heart rate change on electrocardiogram, is caused by a long period of blocked blood supply.
The baseline ECG has an important prognostic value for ACS, as the risk of new or reversible ST segment
depression greater or equal to 0.