Remove Cardiac Arrest Remove Ischemia Remove Ultrasound
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Missed myocardial infarction with subsequent cardiac arrest

Dr. Smith's ECG Blog

Such T-waves are almost always reciprocal to ischemia in the region of aVL (although aVL looks n ormal here) , and in a patient with chest pain are nearly diagnostic of ischemia. An emergency cardiac ultrasound could be very useful. Ischemia on the ECG can be very subtle and is easily missed.

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ECG with Aslanger's Pattern. CT Pulmonary Angiogram Reveals LAD Ischemia (Septal Transmural). But this is not Contradictory.

Dr. Smith's ECG Blog

This suggests diffuse subendocardial ischemia. However, along with that subendocardial ischemia, there is also STE in lead III with reciprocal ST depression in aVL, and some STE in V1. If there is also subendocardial ischemia, the ST depression vector remains leftward, with a reciprocal ST Elevation vector also to the right.

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What are treatment options for this rhythm, when all else fails?

Dr. Smith's ECG Blog

There is no definite evidence of acute ischemia. (ie, Simply stated — t he patient was having recurrent PMVT without Q Tc prolongation, and without evidence of ongoing transmural ischemia. ( Some residual ischemia in the infarct border might still be present. Both episodes are initiated by an "R-on-T" phenomenon.

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A woman in her 70s with chest pain

Dr. Smith's ECG Blog

The differential is: Posterolateral OMI or subendocardial ischemia The distinction between posterior OMI and subendocardial ischemia can be important and sometimes difficult. Bedside ultrasound is another very important piece. Ischemic ST depression includes posterior OMI and subendocardial ischemia.

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LBBB: Using the (Smith) Modified Sgarbossa Criteria would have saved this man's life

Dr. Smith's ECG Blog

Similarly, STEMI guidelines call for urgent angiography for refractory ischemia or electrical/hemodynamic instability, regardless of ECG findings. So there is now high pre-test probability + refractory ischemia + Modified Sgarbossa + dynamic ECG changes. VF arrest is of course "electrical instability"! Learning points 1.

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90 year old with acute chest and epigastric pain, and diffuse ST depression with reciprocal STE in aVR: activate the cath lab?

Dr. Smith's ECG Blog

His response: “subendocardial ischemia. Smith : It should be noted that, in subendocardial ischemia, in contrast to OMI, absence of wall motion abnormality is common. With the history of Afib, CTA abdomen was ordered to r/o mesenteric ischemia vs ischemic colitis vs small bowel obstruction. Anything more on history?

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Syncope, Shock, AV block, Large RV, "Anterior" ST Elevation.

Dr. Smith's ECG Blog

There is ST depression beyond the end of the wide QRS in I, II, aVF, and V4-V6, diagnostic of with subendocardial ischemia. A bedside cardiac ultrasound was recorded: Here is a still image of the echo: The red arrows outline the right ventricle and the yellow arrows outline the left ventricle chamber. There is no ST elevation.

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