Arrhythmia Ischemia Pharmacology 
Dr. Smith's ECG Blog
NOVEMBER 26, 2018
In some cases the ischemia can be seen "through" the flutter waves, whereas in other cases the arrhythmia must be terminated before the ischemia can be clearly distinguished. In this case, there is diffuse ischemic ST depression of subendocardial ischemia, of course with accompanying reciprocal STE in aVR.
Dr. Smith's ECG Blog
OCTOBER 23, 2023
T-wave alternans and the susceptibility to ventricular arrhythmias. Chronic amiodarone evokes no torsade de pointes arrhythmias despite QT lengthening in an animal model of acquired long-QT syndrome. Alternation in ST segment appearance ( or in the amount of ST elevation or depression ) — is often linked to ischemia. 2017.3191.
Dr. Smith's ECG Blog
NOVEMBER 19, 2016
DISCUSSION: The 12-lead EKG EMS initially obtained for this patient showed severe ischemia, with profound "infero-lateral" ST depression and reciprocal ST elevation in lead aVR. The ECG cannot diagnose the etiology of ischemia; it only the presence of ischemia, from whatever etiology.
Dr. Smith's ECG Blog
NOVEMBER 28, 2022
Alternation in ST segment appearance ( or in the amount of ST elevation or depression ) — is often linked to ischemia. Both ST segment and T wave alternans have been known to precede malignant ventricular arrhythmias. This may result from fluctuations in heart rate or in nervous system activity or from pharmacologic treatment.
Dr. Smith's ECG Blog
SEPTEMBER 7, 2020
If the rhythm converts and then reverts to tachycardia with either adenosine or electricity, Neither one of those modalities should be attempted until some longer acting pharmacological solution is given. WPW does not always have delta waves on the baseline ECG. This is called "Concealed conduction".
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