Cardiac Arrest Defibrillator Pacemaker 
Dr. Smith's ECG Blog
APRIL 2, 2024
He was defibrillated, but they also noticed that he was being internally defibrillated and then found that he had an implantable ICD. He was unidentified and there were no records available After 7 shocks, he was successfully defibrillated and brought to the ED. Pacemaker mediated tachycardia! There was no bystander CPR.
HeartRhythm
JULY 3, 2024
A 50-year-old woman with dextrocardia and D-transposition of the great arteries presented with a “RV defib lead impedance” remote-monitoring alert from her implantable cardioverter defibrillator (ICD). An epicardial pacemaker was implanted. In 2012, she had a ventricular fibrillation cardiac arrest.
EMS 12-Lead
MARCH 30, 2024
This is demonstrated ( Figure 5 ) by the gap in arrows at the bottom of the strip, signifying that the demand pacemaker has recognized an underlying rhythm (in this case, artifact from a moving ambulance). The artifact fools the pacemaker into thinking the rhythm is native. Current 85mA. They are unable to feel a pulse and resume CPR.
Dr. Smith's ECG Blog
APRIL 29, 2020
A 60-something woman presented after a witnessed cardiac arrest. She was never defibrillated. This is commonly found after epinephrine for cardiac arrest, but could have been pre-existing and a possible contributing factor to cardiac arrest. Cardiac cath showed minimal disease. She recovered.
Dr. Smith's ECG Blog
JANUARY 2, 2025
See this post: How a pause can cause cardiac arrest 2. Place temporary pacemaker 3. Because she has cardiomyopathy and ventricular dysrhythmias, the pacer included an Implanted Cardioverter-Defibrillator (ICD) Echo 6 days later after CRT: Normal estimated left ventricular ejection fraction. The plan: 1.
Dr. Smith's ECG Blog
JULY 21, 2024
He required multiple defibrillations within a period of a few hours. This time, the arrhythmia did not spontaneously terminate — but rather degenerated to VFib, requiring defibrillation. Some episodes of PMVT would terminate spontaneously — but on many occasions, the PMVT degenerated to VFib, requiring defibrillation.
Dr. Smith's ECG Blog
OCTOBER 23, 2023
Edited by Bracey, Meyers, Grauer, and Smith A 50-something-year-old female with a history of an unknown personality disorder and alcohol use disorder arrived via EMS following cardiac arrest with return of spontaneous circulation. She was successfully revived after several rounds of ACLS including defibrillation and amiodarone.
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