Defibrillator Ischemia Stenosis 
Dr. Smith's ECG Blog
APRIL 24, 2015
Again, it is common to have an ECG that shows apparent subendocardial ischemia after resuscitation from cardiac arrest, after defibrillation, and after cardioversion. and repeat the ECG, to see if the apparent ischemia persists. The estimated left ventricular ejection fraction is 58 % Aortic stenosis, mild, 9.0
Dr. Smith's ECG Blog
OCTOBER 4, 2010
He was resuscitated with chest compressions and defibrillation and 1 mg of epinephrine. ACS would be highly unusual in a young athlete, and given the information on his race bib, one must first suspect that the abnormal ST elevation is due to demand ischemia, not ACS. This young male had ventricular fibrillation during a triathlon.
Dr. Smith's ECG Blog
SEPTEMBER 29, 2024
This usually represents posterior OMI, but in tachycardia and especially after cardiac arrest, this could simply be demand ischemia, residual subendocardial ischemia due to the low flow state of the cardiac arrest. This rules out subendocardial ischemia and is diagnostic of posterior OMI. V4-5 continue to show STD. TIMI-0 flow.
Dr. Smith's ECG Blog
OCTOBER 28, 2013
She was found to be in ventricular fibrillation and was defibrillated 8 times without a single, even transient, conversion out of fibrillation. She was immediately intubated during continued compressions, then underwent a 9th defibrillation, which resulted in an organized rhythm at 42 minutes after initial arrest. see below).
Dr. Smith's ECG Blog
NOVEMBER 30, 2022
She was defibrillated and resuscitated. 1-4 Surprisingly, serial angiographic studies have revealed that the plaque at the site of the culprit lesion of a future acute myocardial infarction often does not cause stenosis that, as seen on the antecedent angiogram, is sufficiently severe to limit flow. Learning Points: 1.
Dr. Smith's ECG Blog
JANUARY 23, 2023
Ischemic ST-Segment Depression Maximal in V1-V4 (Versus V5-V6) of Any Amplitude Is Specific for Occlusion Myocardial Infarction (Versus Nonocclusive Ischemia). When the ICD was finally interrogated, the syncopal events and shocks correlated with two VF events that were defibrillated successfully. J Am Heart Assoc. doi: 10.1161/JAHA.121.022866.
Dr. Smith's ECG Blog
OCTOBER 20, 2024
The first task when assessing a wide complex QRS for ischemia is to identify the end of the QRS. The ST segment changes are compatible with severe subendocardial ischemia which can be caused by type I MI from ACS or potentially from type II MI (non-obstructive coronary artery disease with supply/demand mismatch). What do you think?
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