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- $Unique_ID{BRK02093}
- $Pretitle{}
- $Title{Sinus Bradycardia: Causes and Symptoms}
- $Subject{sinus bradycardia slow heart beat rate sinus node electrical impulses
- heart muscle pacemaker pacemakers palpitations syncope vagus nerve carotid
- artery pulse electrocardiogram electrocardiograms cardiac arrest}
- $Volume{}
- $Log{
- Normal Electrocardiogram*0001401.scf}
-
- Copyright (c) 1993 Tribune Media Services, Inc.
-
-
- Sinus Bradycardia: Causes and Symptoms
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-
- QUESTION: Can you please explain what sinus bradycardia is and what are the
- possible causes and symptoms. What are the tests to diagnose it and how is it
- treated? I would be most grateful if you could include all this information
- in one of your columns in the near future.
-
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-
- ANSWER: The word is derived from the Greek word "bradys" which means "slow"
- and "bradycardia" is the term used to indicate a slow heart beat. A group of
- special cells within the heart form the sinus node, and it is this node that
- forms the primary generator of the electrical impulses that set the heart
- muscle to beating. The sinus node is also known as the "pacemaker". A sinus
- bradycardia is defined as a condition where the heart beats less than 60 times
- a minute while the individual is at rest. For many people this is a normal
- situation, particularly when they are young and are in the superb physical
- condition that comes with athletic training. In such cases there are no
- symptoms, and indeed in many situations where the slow beat comes from other
- causes nothing unusual is felt by the patient. In others, a sensation of a
- palpitations may be associated with a slow beat, often because a slowly
- beating heart may contract with greater force than normal. Syncope is another
- symptom that may result from bradycardia. A slow beat may be the result of
- stimulation of the vagus nerve that can occur when experiencing pain, through
- some special stimuli (such as pressure on the carotid artery) during vomiting,
- and as the result of certain medication especially certain tranquilizers. In
- many cases no cause can be found.
- The first indications may come from the physician's examination of the
- pulse, and the characteristics of the heart beat can be further determined by
- testing with an electrocardiogram. Often no treatment is necessary. When
- the situation becomes pronounced, when symptoms increase to the point of
- discomfort, and when the possibility of cardiac arrest must be considered, an
- artificial pacemaker can be used to increase the number of beats per minute
- back to normal.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-