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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...

Decreased pulse rate

Decreased pulse rate

Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...

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Related Experiment Video

Updated: May 27, 2025

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

Published on: February 11, 2022

Sinus node dysfunction following bariatric surgery: A case report.

Kristoffer Dahl¹, Knut Tore Lappegard¹

¹Cardiology Department Bodo, Nordlandssykehuset, Bodo, Norway.

SAGE Open Medical Case Reports

|February 20, 2025

Summary

This summary is machine-generated.

Significant weight loss after gastric sleeve surgery can cause sinus bradycardia (slow heart rate) due to altered leptin metabolism and increased vagal tone. Theophylline offered a noninvasive treatment, highlighting the need for monitoring this cardiac side effect.

Area of Science:

Cardiology
Endocrinology
Bariatric Surgery

Background:

Sinus node dysfunction commonly results from age-related degeneration of the cardiac conduction system.
Symptomatic sinus bradycardia can manifest following significant physiological changes.

Keywords:

Bradycardia bariatric surgery leptin

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