Remove ACS Remove Coronary Remove CPR
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Resuscitated from ventricular fibrillation. Should the cath lab be activated?

Dr. Smith's ECG Blog

They started CPR. But cardiac arrest is a period of near zero flow in the coronary arteries and causes SEVERE ischemia. Then assume there is ACS. Smith's ECG Blog ( See My Comment in the March 1, 2023 post) — DSI does not indicate acute coronary occlusion! It also does not uniformly indicate severe coronary disease.

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SGEM#344: We Will…We Will Cath You – But should We After An OHCA Without ST Elevations?

The Skeptics' Guide to EM

The paramedics achieve return of spontaneous circulation (ROSC) after CPR, advanced cardiac life support (ALCS), and Intubation. Acute coronary syndrome (ACS) is responsible for the majority (60%) of all OHCAs in patients. EMS arrives and finds the patient in monomorphic ventricular tachycardic (VT) cardiac arrest.

EMR 130
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2023 AHA Update on ACLS

EMDocs

Emergent coronary angiography is not recommended over a delayed or selective strategy in patients with ROSC after cardiac arrest in the absence of ST-segment elevation, shock, electrical instability, signs of significant myocardial damage, and ongoing ischemia (Level 3: no benefit). COR 2b, LOE B-R. COR 2b, LOE C-LD. COR 2a, LOE B-R.

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How does Acute Total Left Main Coronary occlusion present on the ECG?

Dr. Smith's ECG Blog

Post by Smith and Meyers Sam Ghali ( [link] ) just asked me (Smith): "Steve, do left main coronary artery *occlusions* (actual ones with transmural ischemia) have ST Depression or ST Elevation in aVR?" Furthermore, among 35 patients with acute left main coronary artery occlusion, 9 presented with RBBB (mostly with LAFB) on the admission ECG.

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Ventricular Fibrillation, ICD, LBBB, QRS of 210 ms, Positive Smith Modified Sgarbossa Criteria, and Pacemaker-Mediated Tachycardia

Dr. Smith's ECG Blog

There was no bystander CPR. I was there and said, "No, I think this is all due to severe chronic cardiomyopathy and cardiac arrest due to primary ventricular fibrillation, not due to ACS." _ Why did I say that? For this reason we did not believe this was an acute coronary event and did not activate the cath lab.

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Electrical injuries

Don't Forget the Bubbles

However, vertical flow can result in myocardial injury secondary to coronary artery spasm. This is supplied via alternating current (AC), increasing the risk of titanic contraction of skeletal muscle, leading to kids holding on to the electrical power source. AC and DC shocks may result in different injury patterns.

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A 50-something with chest pain.

Dr. Smith's ECG Blog

More past history: hypertension, tobacco use, coronary artery disease with two vessel PCI to the right coronary artery and circumflex artery several years prior. This is diagnostic of ACS; it appears to be a reperfused acute inferior OMI. It is unknown when this pain recurred and became constant.