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Review on Cardiac Implantable Electronic Devices: Key Points

American College of Cardiology

The following are key points to remember from a review article on cardiac implantable electronic devices (CIEDs), which include pacemakers for bradycardia, biventricular pacemakers for heart failure, and implantable cardioverter–defibrillators (ICDs) for the treatment of sudden cardiac death:

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ID: 4120981 A Step Forward in Predictive Cardiology: AI-Driven ECG Algorithm for Predicting the Occurrence of Intraventricular Conduction Abnormalities with Wide QRS Complex

HeartRhythm

Intraventricular conduction abnormalities (ICA) can progress without specific symptoms or occur after cardiac valve or ischemic heart interventions or surgeries, potentially causing severe bradycardia that may lead to falls or sudden cardiac death. To date, there is no appropriate way to predict this in advance.

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PO-02-092 FETAL BRADYARRHYTHMIAS PROMPTING PARENTAL DIAGNOSIS OF LONG QT SYNDROME

HeartRhythm

Long QT syndrome is most commonly an inherited condition associated with a risk of sudden cardiac death. It is recognized that LQTS in the fetus may present as sinus bradycardia (SB), functional 2:1 atrioventricular block and ventricular arrhythmias (VA).

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A 40-Something male with a "Seizure," Hypotension, and Bradycardia

Dr. Smith's ECG Blog

Both of these features make inferior + RV MI by far the most likely ( Pseudoanteroseptal MI is another name for this ) There is also sinus bradycardia and t he patient is in shock with hypotension. A narrow complex bradycardia without any P-waves is also likely to respond to atropine, as it may be a junctional rhythm.

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Why is an Implantable Defibrillator NOT Useful Soon After Myocardial Infarction?

All About Cardiovascular System and Disorders

Then, why is it mentioned that, implanting a defibrillator soon after an acute myocardial infarction, in those with left ventricular dysfunction and prone for ventricular arrhythmias and sudden cardiac death, is not useful? Mostly for protection against sudden cardiac death. So, this is how an ICD works.

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What kind of AV block is this? And why does she develop Ventricular Tachycardia?

Dr. Smith's ECG Blog

The granulomatous inflammation affects the heart, causing an infiltrative cardiomyopathy The most common manifestations of cardiac sarcoidosis are atrioventricular (AV) block and ventricular tachyarrhythmias (VT). SCD (sudden cardiac death) from sarcoid heart disease is thought to be caused by either from high-grade AV block or VT.

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Hyperthermia and ST Elevation

Dr. Smith's ECG Blog

The limb lead abnormalities appear to be part of the Brugada pattern, as described in this article: Inferior and Lateral Electrocardiographic RepolarizationAbnormalities in Brugada Syndrome Discussion Brugada Type 1 ECG changes are associated with sudden cardiac death (SCD) and the occurrence of ventricular dysrhythmias.