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Topic: Bradycardia

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	Bradycardia- Health Encyclopedia and Reference
		Bradycardia is a slower than normal heart rate.
		Bradycardia can also occur secondary to certain illnesses (such as decreased thyroid function, certain gastrointestinal disorders, and jaundice), or the abuse of certain drugs.
		Bradycardia is common in elderly people (whether or not they suffer from arteriosclerosis) and infants with certain types of congenital heart disease.
	www.healthcentral.com /encyclopedia/408/201.html (692 words)

	InteliHealth:
		Bradycardia is an abnormally slow heart rate of less than 60 beats per minute.
		Bradycardia, even as low as 50 beats per minute, can be normal in athletes and other people who are physically active.
		When bradycardia occurs as a side effect of medication, it usually will go away as soon as the drug that triggered the bradycardia is used by the body or excreted in the urine.
	www.intelihealth.com /IH/ihtIH/WSIHW000/9339/23922.html (1254 words)

	Bradycardia, Respironics
		Bradycardia, also referred to as brachycardia (pronounced BRACK-e-car-dee-ah), is a slow heart beat.
		Similarly, athletes may have bradycardia because they are in such good shape that their hearts work more efficiently and don’t have to pump as often to circulate the blood.
		Even though bradycardia is an abnormality in the heart, it is not treated unless you experience symptoms.
	bradycardia.respironics.com (358 words)

	Bradycardia
		Bradycardia, even as low as 50 beats per minute, can be normal in athletes and other people who are physically active.
		For example, people whose bradycardia is due to severe hypothyroidism also can have constipation, muscle cramps, weight gain (often despite poor appetite), very dry skin, hair that is thin and dry, an abnormal sensitivity to cold temperatures and other symptoms related to low levels of thyroid hormones.
		When bradycardia occurs as a side effect of medication, it usually will go away as soon as the drug that triggered the bradycardia is used by the body or excreted in the urine.
	womenshealth.aetna.com /WH/ihtWH/r.WSIHW000/st.36134/t.36220.html (1109 words)

	BestDoctors.com: Condition Summary: Bradycardia (Site not responding. Last check: 2007-10-19)
		Bradycardia is a term used to describe a pulse, or heart rate, that is less than 60 beats per minute.
		Classification of bradycardia, in terms of its mecahnism, is useful to your doctor in guiding evaluation and therapy, directing investigation to other possible cardiac and medical conditions, as well as in outlining prognosis.
		Correlation of symptoms with a bradycardia, as might be obtained using an ambulatory heart rhythm monitor, is important if pacing or other therapy is to be of symptomatic benefit and is to be chosen for a specific cause of bradycardia.
	www.bestdoctors.com /en/conditions/b/bradycardia/bradycardia_120600.htm (2541 words)

	Bradycardia
		It may be manifested as sinus bradycardia, sinus pauses or arrest, sinus tachycardia, sinus brady-tachycardia synd, atrial fibrillation or flutter.
		The management of bradycardia is determined by the severity of symptoms, the degree of correlation between symptoms and confirmed bradycardia, and the presence of potentially reversible causes.
		In cases in which bradycardia is symptomatic and irreversible, pacemaker therapy is highly effective for the relief of symptoms.
	enotes.tripod.com /bradycardia.htm (1497 words)

	Bradycardia (Site not responding. Last check: 2007-10-19)
		Bradycardia or Bradyarrhythmia is essentially the condition wherein the subject experiences an abnormally slow heartbeat.
		Bradycardia is characterized by a heart rate of less than 60 beats per minute, or, more precisely, 45 beats per minute of less than 60 beats per minute during period of strenuous physical activity.
		Bradycardia can be caused by genetics, heart disease, such as heart block, medications, and metabolic disorders, such as hypothyroidism.
	www.louisville.edu /~cmbrai02/bradycardia.htm (614 words)

	Health Library - (Site not responding. Last check: 2007-10-19)
		In bradycardia, the electrical impulses are disrupted at the nodes and/or along the electrical pathways, resulting in a slow heart rate.
		Bradycardia is often caused by an underlying heart condition that has damaged the heart's conduction system.
		When bradycardia is caused by a medication or an underlying medical condition, such as hypothyroidism or electrolyte imbalance, the underlying cause can often be successfully treated and the bradycardia resolves.
	yalenewhavenhealth.org /library/healthguide/IllnessConditions/topic.asp?hwid=aa107571 (809 words)

	Heart Info - Bradycardia
		Bradycardia is a slower than normal heart rate.
		Bradycardia can also occur secondary to certain illnesses (such as decreased thyroid function, certain gastrointestinal disorders, and jaundice), or the abuse of certain drugs.
		Bradycardia is common in elderly people (whether or not they suffer from arteriosclerosis) and infants with certain types of congenital heart disease.
	www.heartinfo.org /ms/ency/201/main.html (594 words)

	Bradycardia (Site not responding. Last check: 2007-10-19)
		Bradycardia is a heart rate that is less than 60 beats per minute.
		Bradycardia may cause low cardiac output of blood, which can cause low blood pressure and low delivery of blood to the brain or heart.
		If no cause is found for the bradycardia and the patient continues to have symptoms, a pacemaker may have to be implanted to help the heart beat faster.
	www.lakeside.ca /Patient_Info/bradycardia.htm (423 words)

	Nursing: Bradycardia: Slow heart rate? Think fast!
		Bradycardias are a class of arrhythmias that include sinus bradycardia, junctional escape rhythms, ventricular escape rhythms, and AV blocks.
		This type of bradycardia occurs when the rate generated by the patient's dominant or primary pacemaker (usually the SA node) decreases to the point where it's less than the rate generated by an escape pacemaker in the AV junction (AV node and bundle of His).
		This type of bradycardia usually occurs when a patient's dominant pacemaker rate, as well as the AV junctional escape pacemaker rate, is less than the rate of the ventricular escape pacemaker.
	www.findarticles.com /p/articles/mi_qa3689/is_200401/ai_n9345915 (1314 words)

	bradycardia (Site not responding. Last check: 2007-10-19)
		Bradycardia (BRAY - dee - CARD - ee - ah) means slowing of the heart rate.
		This may occur either under nervous system control, as in the gag or diving reflexes that cause the heart to slow, or as a general sign of diminishing blood oxygen concentration, as seen with infantile apnea or in shock.
		This is the "B" part of "A's and B's" ("apneas and bradycardias") you might hear around the neonatal intensive care nursery.
	www.drhull.com /EncyMaster/B/bradycardia.html (92 words)

	eMedicine - Sinus Bradycardia : Article by Mark W Livingston
		The pathophysiology of sinus bradycardia is dependent on the underlying cause.
		Sinus bradycardia may also be caused by the sick sinus syndrome, which involves a dysfunction in the ability of the sinus node to generate or transmit an action potential to the atria.
		In patients with sinus bradycardia secondary to therapeutic use of digitalis, beta-blockers, or calcium channel blockers, simple discontinuation of the drug, along with monitored observation, are often all that is necessary.
	www.emedicine.com /EMERG/topic534.htm (2112 words)

	Bradycardia
		With both absolute and relative bradycardia the nurse must be aware of the classic signs and symptoms of hemodynamic compromise.
		In addition to categorizing bradycardias according to the heart rate, they can be categorized according to that part of the hearts conduction system that is affected.
		Sinus bradycardia originates in the sinoatrial node and is characterized by a heart rate less than 60 beats per minute.
	rnbob.tripod.com /bradycardia.htm (1114 words)

	Bradycardia (Slow Heart Rate)
		In bradycardia, electrical signals that normally keep the heart beating in a regular and rhythmic manner are disrupted, resulting in a slow heart rate.
		Bradycardia is often caused by another heart condition that has damaged the heart's electrical system.
		If for some reason severe bradycardia is not treated, it can lead to other serious problems, including fainting and injuries from fainting, seizures, and death.
	www.peacehealth.org /kbase/topic/special/aa107571/sec1.htm (722 words)

	Bradycardia - Heart Conditions - Strong Heart and Vascular Center
		Bradycardia is a type of arrhythmia where the heart beats at a slower than normal rate.
		Treatment for bradycardia varies from person to person and depends upon the severity, frequency and cause of the bradycardia.
		Medication to prevent blood clots, to control low blood pressure or to control other medical conditions (such as thyroid disease) can be effective in preventing bradycardia.
	www.stronghealth.com /services/cardiology/Conditions/bradycardia.cfm (404 words)

	sinusbrady (Site not responding. Last check: 2007-10-19)
		Sinus bradycardia occurs when the hearts rate is slower than 60 beats per minute.
		The sinus bradycardia rhythm is similar to normal sinus rhythm, except that the RR interval is longer.
		Bradycardia may be accompanied by an increase in stroke volume due to greater end diastolic pressure (preload).
	sprojects.mmi.mcgill.ca /cardiophysio/sinusbrady.htm (310 words)

	Bradycardia Evaluation
		If bradycardia is confirmed or suspected in a patient, possible intrinsic or extrinsic causes must be sought, including obstructive sleep apnea (absent breathing due to obstruction in the throat by the uvula), and medications affecting heart rate (see figure 93a).
		If the symptoms are intermittent, a 24 hour EKG Holter test (see figures 96A, 96B, 97, 98, 99, 100, 101, 102) may be necessary to assist with the diagnosis and the correlation of symptoms with the onset of bradycardia.
		Also, testing with the EKG while the patient is lying on a tilt table with a head up position may be used to provoke an episode of fainting with changes in heart rate and blood pressure.
	www.rjmatthewsmd.com /Definitions/bradycardia_evaluation.htm (143 words)

	Bradycardia - Pacemakers and Heart Arrhythmias (Site not responding. Last check: 2007-10-19)
		Bradycardia is a condition in which the heart beats too slowly – usually less than 60 beats per minute.
		Bradycardia may be caused by a problem with your heart's natural pacemaker (S-A node) or a problem with your heart's electrical pathways.
		A bradycardia sufferer may feel tired, light-headed, or dizzy.
	www.guidant.com /webapp/emarketing/compass/comp.jsp?lev1=brady&lev2=glance (115 words)

	Bradycardia
		Bradycardia is a condition of the heart in which the pulse rate (heart beat) falls to a level, which causes the patient to have symptoms of fainting as well as easy fatigue, dizziness, etc.
		A very slow pulse rate can be tolerated,so long as the amount of blood pumped out of the left side of the heart per minute is adequate to oxygenate the brain and the other parts of the body.
		Episodes of sinus bradycardia with heart rates as low as 30 beats per minute, which cause no symptoms, are to be considered with in the normal range.
	www.rjmatthewsmd.com /Definitions/bradycardia.htm (315 words)

	Bradycardia - Diagnosis and Treatment Options at Mayo Clinic
		Mayo Clinic is internationally recognized for its expertise in the treatment of bradycardia (the heart beats abnormally slow).
		At Mayo Clinic, the first step in bradycardia treatment is a thorough evaluation to identify the underlying cause of the abnormally slow heart rate.
		Bradycardia describes a heart rate that drops below 50 beats per minute, compared to a normal heartbeat rate of about 72.
	www.mayoclinic.org /bradycardia/index.html (461 words)

	Bradycardia in acute haemorrhage -- Thomas and Dixon 328 (7437): 451 -- BMJ
		Bradycardia in acute haemorrhage -- Thomas and Dixon 328 (7437): 451 -- BMJ
		Triphasic response to haemorrhage, relative bradycardia and non-linear triggering of the cardiac vagal afferents during acute haemorrhage.
		Bradycardia in acute haemorrhage is seen in clinical practice.
	bmj.bmjjournals.com /cgi/content/full/328/7437/451 (1195 words)

	sinusbrady
		Sinus bradycardia occurs when the hearts rate is slower than 60 beats per minute.
		The sinus bradycardia rhythm is similar to normal sinus rhythm, except that the RR interval is longer.
		Bradycardia may be accompanied by an increase in stroke volume due to greater end diastolic pressure (preload).
	www.technion.ac.il /~eilamp/sinusbrady.html (310 words)

	Role of Adenosine Receptors in the Paradoxic Bradycardia Response of Rats to Inferior Vena Cava Occlusion During an ...
		Role of Adenosine Receptors in the Paradoxic Bradycardia Response of Rats to Inferior Vena Cava Occlusion During an Infusion of Isoproterenol -- Waxman and Asta 98 (12): 1228 -- Circulation
		Role of Adenosine Receptors in the Paradoxic Bradycardia Response of Rats to Inferior Vena Cava Occlusion During an Infusion of Isoproterenol
		bradycardia reflex during inferior vena cava occlusion in the
	circ.ahajournals.org /cgi/content/abstract/circulationaha;98/12/1228 (329 words)

	Bradycardia -- eCureMe.com
		Bradycardia can be normal, especially in athletes (their heart is so well conditioned it beats more efficiently) or during sleep.
		After the electrical impulse is generated in the node, it travels to the ventricles and the rest of the heart through the A-V node (an area between the atria and ventricles), thus any damage to these areas will slow the rate of this electrical impulse, which may lead to bradycardia or other arrhythmias.
		Bradycardia may be a consequence of other disorders such as
	www.ecureme.com /emyhealth/data/Bradycardia.asp (235 words)

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