Related Experiment Video
Updated: Feb 9, 2026
05:12
Transesophageal Atrial Burst Pacing for Atrial Fibrillation Induction in Rats
Published on: February 14, 2022
3.8K
Exercise and Atrial Fibrillation: Prevention or Causation?
Adrian D Elliott1, Dominik Linz1, Christian V Verdicchio1
1Centre for Heart Rhythm Disorders, University of Adelaide, Royal Adelaide Hospital and the South Australian Health & Medical Research Institute, Adelaide, SA, Australia.
Heart, Lung & Circulation
|June 13, 2018
Summary
Regular exercise benefits heart health, but intense endurance training may paradoxically increase atrial fibrillation (AF) risk in athletes. Further research is needed to understand these mechanisms.
Area of Science:
- Cardiology
- Sports Medicine
- Exercise Physiology
Background:
- Regular exercise improves cardiovascular health and reduces mortality.
- Physical activity and cardiorespiratory fitness are linked to lower atrial fibrillation (AF) incidence.
- Endurance exercise may paradoxically increase AF risk.
Purpose of the Study:
- To review evidence on exercise and AF incidence.
- To examine the increased AF risk associated with endurance exercise.
- To discuss mechanisms and risk factors for AF in athletes.
Main Methods:
- Literature review of existing studies.
- Analysis of epidemiological data on exercise and AF.
- Synthesis of proposed pathophysiological mechanisms.
Main Results:
- General physical activity reduces AF risk.
- High-volume endurance exercise shows a paradoxical increase in AF incidence.
- Autonomic changes and atrial substrate alterations are implicated.
Conclusions:
- While exercise is generally cardioprotective, intense endurance training presents a unique AF risk.
- Understanding the mechanisms is crucial for athlete health.
- Further research is needed to mitigate AF risk in endurance athletes.
Related Concept Videos
03:03Amyloid Fibrils
12.0K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
12.0K
03:03Amyloid Fibrils
6.5K
6.5K
01:27Correlation and Causation
42.9K
Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
42.9K
01:11Fibril-associated Collagen
3.4K
Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
3.4K
02:59Cancer Prevention
8.2K
Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Some...
8.2K
01:26Exercise Stress Test
1.4K
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
1.4K