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Cardiac Arrhythmias

Arrhythmia is a common term to describe an abnormal heart beat.  There are many different types of Arrhythmias.  Some can be life threatening, while others are really relatively harmless.  Some arrhythmias are diagnosed due to the symptoms they cause, while others are diagnosed incidentally during a regular healthcare checkup.   

 

Causes of arrhythmia:

The heart, as are all muscles, is powered by electricity.  Normal heart rhythm is generated by a regular impulse of an electrical signal that spreads through the heart.  The body has a natural pacemaker in the right atrium (the top chamber of the heart on the right side).  This fires typically at a rate between 60-100 beats per minute at rest.  This sends a signal down through the heart.  The heart muscle then squeezes in response to this electrical signal.  Electrical activity initially passes through the two top chambers of the heart called the atria.  An electrical bridge called the A-V node, slightly delays the electrical activity, which then spreads through specialized fibers called the bundle branches, into the ventricles, or the bottom chambers of the heart that are responsible for most of the pumping.  The ventricles them contract in response to the spreading of the electrical signal.  When the heart contracts, blood is pumped out of the heart and to the blood vessels for the rest of the body.  This generates a pulse that can be felt throughout the body.  When this normal pattern of electrical activity is disturbed for some reason that is when an arrhythmia, or abnormal heart beat results

Cardiac Arrythmia Cardiac Electrical

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