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Dysrhythmias IV: Characteristics of Bradyarrhythmias

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Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...

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Updated: Oct 31, 2025

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

A Case of Intermittent Left Bundle Branch Block.

Syed M Saad¹, Faran S Polani², Paul LeLorier¹

¹Cardiology, Louisiana State University Health Sciences Center, New Orleans, USA.

|June 30, 2021

Summary

This summary is machine-generated.

Intermittent left bundle branch block (LBBB) can occur without underlying heart disease. This case demonstrates that LBBB is not always linked to ischemia or other serious cardiac conditions.

Area of Science:

Cardiology
Electrophysiology

Background:

Intermittent left bundle branch block (LBBB) is a cardiac condition that can present with various symptoms.
The association between LBBB and underlying cardiac pathology, such as coronary ischemia, is well-documented.

Keywords:

ekg intermittent left bundle branch block

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