Defibrillator Ischemia Pacemaker 
Dr. Smith's ECG Blog
JANUARY 2, 2025
Place temporary pacemaker 3. It should be kept in mind that on occasions, beta-one agonist can result in increased ventricular ectopy e.g., in severe myocardial ischemia (by increasing myocardial demand), or sometimes with congenital long-QT syndrome. See this post: How a pause can cause cardiac arrest 2. No wall motion abnormality.
Dr. Smith's ECG Blog
OCTOBER 23, 2023
She was successfully revived after several rounds of ACLS including defibrillation and amiodarone. T wave alternans is characterized by variation in T-wave morphology in the setting of consistent pacemaker and QRS morphology. (1) On arrival to the ED the patient was intubated with normal vital signs. Teaching Points: 1.
Dr. Smith's ECG Blog
APRIL 29, 2020
She was never defibrillated. Therefore, she underwent temporary pacemaker placement and overdrive pacing at a rate of 90 bpm to keep the heart rate up in order to prevent these PVCs triggering ventricular arrhythmia. As was seen in this case — defibrillation and/or overdrive pacing may be needed. Acute ischemia?
Dr. Smith's ECG Blog
MARCH 15, 2023
We examined the effect of ibutilide, a class III antiarrhythmic agent, on the energy requirement for atrial defibrillation and assessed the value of this agent in facilitating cardioversion in patients with atrial fibrillation that is resistant to conventional transthoracic cardioversion.
Dr. Smith's ECG Blog
JULY 21, 2024
He required multiple defibrillations within a period of a few hours. There is no definite evidence of acute ischemia. (ie, This time, the arrhythmia did not spontaneously terminate — but rather degenerated to VFib, requiring defibrillation. Some residual ischemia in the infarct border might still be present.
Dr. Smith's ECG Blog
JANUARY 23, 2024
Isoprenalin was discontinued, and a temporary transveous pacemaker was implanted. The patient stabilized following pacemaker placement. Extensive conduction system abnormalities can have various causes (ischemia, genetic, infectious, amyloid, etc). She was given CRT-D (Cardiac Resynchronization Therapy-Defibrillator).
Dr. Smith's ECG Blog
DECEMBER 20, 2024
No evidence for ischemia jumps out. How does a pacemaker accomplish RBBB morphology? This is the shock coil and identifies this device as a defibrillator. Quick aside on device terminology (feel free to skip): A "single chamber" pacemaker is a device with only one lead. ECG 1 What do you think? Point 1: What is PVARP?
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