Hypoxia and Medicine

4.What kind of ECG changes would indicate myocardial ischemia?

Thanks for any info you can give.

Public Comments

1. ST segment depression in any lead. Lead II, also known as a rhythm strip, may not show enough ST depression from baseline to make a tentative diagnosis of ischemia, so check at least a 3-lead tracing, and, of course, preferably, a 12-lead. Rate may not vary, or may even be misleading. Ischemia will increase myocardial oxygen demand, and may prompt an adrenergic response, with a rapid pulse; however, your patient may also present with bradycardia due to ischemia.
2. The 12 lead ECG is used to classify patients into one of three groups: 1. those with ST segment elevation or new bundle branch block (suspicious for acute injury and a possible candidate for acute reperfusion therapy with thrombolytics or primary PCI), 2. those with ST segment depression or T wave inversion (suspicious for ischemia), and 3. those with a so-called non-diagnostic or normal ECG.
3. two Types of MI ; 1- non ST elevated MI, which might be associated with ST depression 2- ST elevated MI,which might be associated with ST elevation ( above 1 mm in limb leads,and above 2mm in periodical leads) according to the site of infarction the elevation will be presented, also you might see hyperacute T wave with narrow base