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A complication of
mitral valve stenosis or
mitral valve regurgitation (MR) is an irregular
This irregular heartbeat is created by a
disruption in a web of nerves covering the surface of the heart. These nerves
send electrical signals that cause your heart to contract and pump blood out of
This web of nerves is controlled by a collection of
cells on the right atrium called the sinoatrial node. As it fires, so do the
rest of the nerves, causing all of the muscle cells in your heart to contract,
producing one forceful pump.
As mitral valve stenosis or MR
stretches out your heart, it too can disrupt this web of nerves. Communication
pathways may weaken because the sinoatrial node is no longer working correctly.
Without clear signals from this node, the nerves begin to fire randomly,
creating a chaotic network of electrical signals. When this happens, the heart
is no longer able to pump with one motion, and instead it starts beating
Atrial fibrillation is the most common arrhythmia that stems from mitral valve
stenosis and MR.
For more information, see the topic Atrial
ByHealthwise StaffPrimary Medical ReviewerRakesh K. Pai, MD, FACC - Cardiology, ElectrophysiologySpecialist Medical ReviewerJohn A. McPherson, MD, FACC, FSCAI - Cardiology
Current as ofFebruary 20, 2015
Current as of:
February 20, 2015
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & John A. McPherson, MD, FACC, FSCAI - Cardiology
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