Home > Mitral Valve Disease: Heart Rhythm Problems
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
irregularly. Then, the heart is no longer able to pump in a coordinated motion.
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, ElectrophysiologyMartin J. Gabica, MD - Family MedicineE. Gregory Thompson, MD - Internal MedicineSpecialist Medical ReviewerMichael P. Pignone, MD, MPH, FACP - Internal Medicine
Current as ofJanuary 18, 2017
Current as of:
January 18, 2017
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & Martin J. Gabica, MD - Family Medicine & E. Gregory Thompson, MD - Internal Medicine & Michael P. Pignone, MD, MPH, FACP - Internal Medicine
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