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Related to bradycardia-tachycardia syndrome: sick sinus syndrome
slowness of the heartbeat, so that the pulse rate is less than 60 per minute. This can occur in normal persons, particularly during sleep; trained athletes also usually have slow pulse and heart rates. adj., adj bradycar´diac.
fetal bradycardia a fetal heart rate of less than 120 beats per minute, generally associated with hypoxia; it is usually due to placental insufficiency; it may also result from transfer of local anesthetics or beta-adrenergic blocking agents, and rarely to heart block associated with congenital heart disease or maternal collagen vascular disease.
nodal bradycardia bradycardia in which the stimulus of the heart's contraction arises in the atrioventricular node or common bundle.
sinoatrial bradycardia (sinus bradycardia) a slow sinus rhythm, with a heart rate of less than 60 beats per minute in an adult; it is common in young adults and in athletes but is also a manifestation of some disorders.
Etymology: Gk, bradys + kardia, + tachys, fast, kardia + syn, together, dromos, course
bradycardia-tachycardia syndromeBrady-tachy syndrome Cardiology A form of sinus-node dysfunction–sick sinus syndrome characterized by alternating periods of atrial tachyarrhythmias and bradycardias. See Sick sinus syndrome.
slowness of the heartbeat, in dogs and cats to less than 60 beats per minute.
a slow sinus rhythm, characterized by normal electrocardiographic complexes in a normal rhythm or a sinus arrhythmia. A normal finding, most commonly seen in large breeds of dogs or athletic animals.
see sick sinus syndrome.