bradycardia

bradycardic, adj.
/brad'i kahr"dee euh/, n. Med.
a slow heartbeat rate, usually less than 60 beats per minute.
[1885-90; BRADY- + -CARDIA]

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      type of arrhythmia (abnormal heart rhythm) characterized by slowing of the heart rate to 60 beats per minute or less. A slow heart rate in itself may have little medical significance; bradycardia is frequent among young adults, especially in highly trained athletes or during sleep. However, bradycardia may indicate significant heart disease if accompanied by other symptoms. Bradycardia caused by a dysfunction of the sinoatrial node (sinus bradycardia), the heart's natural pacemaker, often produces weakness, confusion, palpitations, and fainting ( syncope). When slowing alternates with rapid acceleration of the heart rate ( tachycardia) in sick sinus syndrome or when bradycardia is accompanied by congestive heart failure or other serious complications, an artificial pacemaker may be necessary to regulate the heart rate. Another common cause of bradycardia, the blockage of electrical conduction through the atrioventricular node ( heart block), is similar in its symptoms to sinus bradycardia. Bradycardia can also be produced by drugs such as digitalis or morphine and is a common abnormality in heart attack (myocardial infarction) victims, for whom it often indicates a favourable prognosis.

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Universalium. 2010.

Look at other dictionaries:

  • bradycardia — [brad΄i kär′dē ə] n. [< BRADY + Gr kardia,HEART] abnormally slow heartbeat: below 60 beats per minute for an adult …   English World dictionary

  • Bradycardia — SignSymptom infobox Name = Bradycardia ICD10 = ICD10|R|00|1|r|00 ICD9 = ICD9|427.81, ICD9|659.7, ICD9|785.9, ICD9|779.81 Bradycardia, as applied to adult medicine, is defined as a resting heart rate of under 60 beats per minute, though it is… …   Wikipedia

  • Bradycardia — A slow heart rate, usually defined as less than 60 beats per minute. The word bradycardia is logically derived from two Greek roots: bradys, slow + cardia, heart = slow heart. * * * Slowness of the heartbeat, usually defined (by convention) as a… …   Medical dictionary

  • bradycardia — n. slowing of the heart rate to less than 50 beats per minute. Sinus bradycardia is often found in healthy individuals, especially athletes, but it is also seen in some patients with reduced thyroid activity, jaundice, hypothermia, or vasovagal… …   The new mediacal dictionary

  • bradycardia —    A distinctly slow heartbeat, which may be a normal idiosyncrasy or with causes ranging from regular strenuous exercise to abnormally slow heart stimulus to the side effects of medication. Bradycardia is usually defined as a pulse below sixty… …   Herbal-medical glossary

  • bradycardia — noun Etymology: New Latin Date: circa 1890 relatively slow heart action compare tachycardia …   New Collegiate Dictionary

  • bradycardia — Condition in which the heart beats unusually slowly. Opposite of tachycardia …   Dictionary of molecular biology

  • bradycardia — noun The condition of having a slow heartbeat, defined as under 60 beats per minute for an adult. Syn: brachycardia …   Wiktionary

  • bradycardia — n. unusually slow heartbeat …   English contemporary dictionary

  • bradycardia — [ˌbradɪ kα:dɪə] noun Medicine abnormally slow heart action. Origin C19: from Gk bradus slow + kardia heart …   English new terms dictionary

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