bradycardia

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Related to Sinus bradycardia: sinus arrhythmia, Sinus tachycardia

bradycardia:

see arrhythmiaarrhythmia
, disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms.
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Bradycardia

 

decrease in frequency of heart contractions to less than 60 beats per minute.

Bradycardia may be found as a normal, constitutionally conditioned phenomenon in perfectly healthy persons, in well-trained athletes, and as one of the symptoms in many diseases. More often, bradycardia is observed as a result of organic disturbances of auriculoventricular conductivity—heart blockage, myocardial infarction, and inflammatory (infectious or toxic) diseases of the heart muscle. Complete blockage of the heart with a pulse frequency of 30–40 beats per minute or less threatens brain complications: loss of consciousness, convulsions, and cessation of heart activity. Prophylaxis and treatment are directed toward removal of the cause.

bradycardia

[¦brād·i¦kärd·ē·ə]
(medicine)
Slow heart rate.
References in periodicals archive ?
16 10 26 65-70 20 14 34 >70 23 17 40 Total 59 41 100 Table II: ECG Findings in Cerebrovascular Accidents showing Specific ECG Changes in Different Types of Stroke CT CH SAH CE Total % Q-Tc Prolongation 14 14 0 2 30 30 ST Segment Changes 6 16 4 2 28 28 T-Wave Changes 10 22 6 6 44 44 U-Waves 0 6 4 0 10 10 Q-Waves 2 0 0 0 2 4 LVH 16 18 2 0 36 36 Sinus Arrhythmia 0 2 0 0 2 2 Sinus T achycardia 10 10 2 2 24 24 Sinus Bradycardia 6 4 0 0 10 10 Atrial Fibrillation 2 0 0 2 4 4 Vent.
Its characteristics suggest that marked sinus bradycardia should be included as a protean manifestation of hantavirus.
Sinus bradycardia may occur during sleep or with the well-conditioned heart and be well tolerated.
sup][6],[7] The common types of arrhythmia reported include sinus bradycardia, supraventricular tachycardia, atrial premature beats, atrial ventricular (AV) block, and atrial fibrillation.
ECG recording showing asystole lasting 16 second followed by a profound sinus bradycardia lasting 10 second at (paper speed-25 mm per second and at amplitude--10 mm per mV amplitude).
Electrocardiography revealed sinus bradycardia with prolonged QT interval.
The initial electrocardiogram revealed prominent Osborn waves as well as other findings characteristic of hypothermia, including sinus bradycardia and prolonged PR, QRS and corrected QT intervals.
A less common and self-limited sinus bradycardia has also been described in fetuses.
Sinus bradycardia is present when heart rates are below 60 per minute for extended periods of time.
PRESIDENT Bush has a minor heart condition - sinus bradycardia - which led to him fainting when he choked on a pretzel, it was revealed last night.
His cardiac rhythm deteriorated from normal sinus rhythm to atrial fibrillation to progressive sinus bradycardia.
While in the MASCOT trial the incidence of permanent AF in this subgroup of patients was too low to draw conclusions, the previous ADOPT study showed that the AF Suppression feature decreases symptoms of AF in a different subgroup of pacemaker patients, specifically patients with sinus bradycardia (slow heart rates) and paroxysmal (not permanent) AF," said Mark D.