Related Experiment Video

Updated: Sep 21, 2025

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

17.9K

Hyperthyroidism and the Risk of Cardiac Arrhythmias: A Narrative Review

Mahlika Ahmad1, Sanjana Reddy2, Zineb Barkhane3

  • 1Internal Medicine, Ziauddin University, Karachi, PAK.

Cureus
|May 27, 2022
PubMed

Insights

Hyperthyroidism significantly increases the risk of heart rhythm problems like atrial fibrillation (AF). Managing thyroid hormones and arrhythmias is crucial for cardiovascular health.

Area of Science:

  • Cardiology
  • Endocrinology
  • Internal Medicine

Background:

  • Hyperthyroidism adversely impacts cardiovascular function.
  • Thyroid hormone excess elevates the risk of cardiac arrhythmias, especially atrial fibrillation (AF).

Purpose of the Study:

  • To review hemodynamic changes and arrhythmia risks in hyperthyroidism.
  • To explore the pathophysiology and treatment of thyrotoxic AF and sinus tachycardia.

Main Methods:

  • Literature review of hemodynamic alterations.
  • Analysis of studies on cardiac arrhythmias in hyperthyroidism.
  • Discussion of treatment modalities for thyrotoxicosis-induced arrhythmias.

Main Results:

  • Hyperthyroidism is linked to increased prevalence and risk of cardiac arrhythmias.
  • Atrial fibrillation and sinus tachycardia are the most common arrhythmias in thyrotoxicosis.
  • Various treatments, including anti-thyroid drugs, beta-blockers, cardioversion, and ablation, are discussed.

Conclusions:

  • Hyperthyroidism poses a significant threat to cardiovascular health, primarily through arrhythmias.
  • Effective management of thyroid hormone levels and arrhythmias is essential.
  • Further research into the multi-level pathophysiology of thyrotoxic AF is warranted.

Keywords:
atrial fibrillationcardiac arrhythmiasheart ratehyperthyroidismmanagement of thyrotoxicosisovert hyperthyroidismsinus tachycardiasubclinical hyperthyroidismthyrotoxicosisventricular arrhythmias

More Related Videos

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice04:45

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice

Published on: May 5, 2022

2.6K
Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice08:05

Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice

Published on: June 29, 2022

3.0K

Related Concept Videos

Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
1.1K
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
125
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

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,...
429
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
143
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
1.3K
Increased pulse rate01:17

Increased pulse rate

Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
764