4 doctors weighed in:
What is pathophysiology of atrial fibrillation?
4 doctors weighed in

Dr. Alon Gitig
Internal Medicine - Cardiology
2 doctors agree
In brief: Incredibly complex
This still remains unknown to a large extent.
We know the pathophysiology is not the same in everyone. Many people have afib as a result of frequent bursts of abnormal electrical activity in the pulmonary veins, which enter the heart and trigger atrial muscle fibrillation. However, stretching of atrial muscle can be a stimulus to trigger fibrillation, as can ischemia (limited blood flow) in some.

In brief: Incredibly complex
This still remains unknown to a large extent.
We know the pathophysiology is not the same in everyone. Many people have afib as a result of frequent bursts of abnormal electrical activity in the pulmonary veins, which enter the heart and trigger atrial muscle fibrillation. However, stretching of atrial muscle can be a stimulus to trigger fibrillation, as can ischemia (limited blood flow) in some.
Dr. Alon Gitig
Dr. Alon Gitig
Thank
Dr. John Garner
Internal Medicine - Cardiology
In brief: If you know...
The picture goes something like this: an unknown insult causes mild deposition of scar tissue and changes in the electrical properties of some atrial muscle.
The atrium then dilates and more scar deposits. Thereafter, it becomes possible for a focus called a rotor to establish itself, waiting to be triggered by extra beats, usu from pulmonary vein foci. Rarely, the pvs can cause fib alone.

In brief: If you know...
The picture goes something like this: an unknown insult causes mild deposition of scar tissue and changes in the electrical properties of some atrial muscle.
The atrium then dilates and more scar deposits. Thereafter, it becomes possible for a focus called a rotor to establish itself, waiting to be triggered by extra beats, usu from pulmonary vein foci. Rarely, the pvs can cause fib alone.
Dr. John Garner
Dr. John Garner
Thank
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