What does a depressed ST segment indicate?
ST depression in ECG at entry indicates severe coronary lesions and large benefits of an early invasive treatment strategy in unstable coronary artery disease; the FRISC II ECG substudy.
What does ST depression look like on ECG?
The ECG is characterized by deep and persistent, concave-upward ST-segment depression in multiple limb and chest leads. ECG changes are stable over time and accentuated during exercise.
Can stress cause ST depression?
An ischemic zone of 50% transmural extent covering the entire left ventricular subendocardium caused an ST-depression pattern similar to that observed during stress test. Conclusion: In contrast to regional subendocardial ischemia, global subendocardial ischemia can explain ST depression in our model.
What does slow upsloping ST-segment depression mean?
Background: Slow upsloping ST-segment depression during stress is thought to represent an ischemic response to exercise treadmill testing (ETT).
How is the depression of the ST segment measured?
ST-segment shifts were measured at the J point for ST-segment elevation and depression. ST-segment depression ≥ 0.05 mV in more than two contiguous leads was recorded and categorized as being up-sloping or non-up-sloping (either horizontal or down-sloping) based on the ST-segment morphology in the lead with the most prominent ST-segment depression.
Is there a clinical significance for up sloping St?
However, up-sloping ST-segment depression has been increasingly recognized as a sign of ischemia, and up-sloping ST-segment depression with a tall positive T waves in precordial leads was observed in 2% cases of anterior myocardial infarction [6].
What is the angiographic correlation of up sloping ST depression?
However , a rapidly upsloping ST is rarely depressed beyond 2mm . ( This is because , the geometric hyperbolic curve of ST segment does not allow a situation of 3mm ST depression at 80msec with rapid upsloping ) What is the angiographic correlation of slow upsloping ST segment depression?