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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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Related Experiment Video

Updated: Dec 14, 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

Left bundle branch pacing: A comprehensive review.

Shunmuga Sundaram Ponnusamy¹, Vanita Arora², Narayanan Namboodiri³

¹Department of Cardiology, Velammal Medical College Hospital and Research Institute, Madurai, Tamil Nadu, India.

Journal of Cardiovascular Electrophysiology

|July 19, 2020

Summary

Left bundle branch pacing (LBBP) offers a promising alternative to traditional pacing for bradyarrhythmia. This physiological pacing method corrects conduction system disease with stable thresholds and lead performance.

Keywords:

conduction system dyssynchrony heart failure left bundle pacing physiological pacing

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

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Published on: November 7, 2019

Area of Science:

Cardiology
Electrophysiology
Medical Devices

Background:

Symptomatic bradyarrhythmia necessitates cardiac pacing.
Traditional right ventricular apical pacing can lead to adverse outcomes like heart failure due to dyssynchrony.
Physiological pacing aims to restore synchronized ventricular contraction.

Purpose of the Study:

To evaluate Left Bundle Branch Pacing (LBBP) as an alternative to His bundle pacing (HBP).
To detail LBBP implantation techniques, troubleshooting, and clinical outcomes.
To review existing literature on LBBP.

Main Methods:

Review of published literature on LBBP.
Description of LBBP implantation procedures.
Analysis of clinical data and troubleshooting strategies for LBBP.

Main Results:

LBBP demonstrates potential as an effective physiological pacing modality.
LBBP offers advantages such as low and stable pacing thresholds and lead stability.
LBBP can correct distal conduction system disease, overcoming HBP limitations.

Conclusions:

LBBP is a viable and effective alternative physiological pacing strategy.
LBBP implantation techniques and troubleshooting are crucial for successful patient outcomes.
Further research and literature review support LBBP's role in managing bradyarrhythmia.