premature beat


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Related to premature beat: premature ventricular contraction, premature complex

beat

 [bēt]
a throb or pulsation, as of the heart or of an artery.
apex beat the beat felt over the apex of the heart in the point of maximal impulse.
atrial beat an ectopic beat originating in an atrium.
capture beat
1. a heartbeat resulting from the production of a ventricular complex by a supraventricular source following a period of atrioventricular dissociation.
2. in cardiac pacing terminology, the successful pacing of the heart by a pulse generator.
dropped beat absence of one ventricular contraction.
echo beat reciprocal beat.
ectopic beat a heartbeat originating at some point other than the sinus node.
escape beat (escaped beat) heartbeats that follow an abnormally long pause.
forced beat an extrasystole produced by artificial stimulation of the heart.
fusion beat in electrocardiography, a P or QRS complex that results from the concurrent activation of the atria or the ventricles by two stimuli in the same chambers. An atrial fusion beat results when the sinus beat coincides with an atrial ectopic beat, when two atrial ectopic beats coincide, or when an atrial or sinus beat coincides with retrograde conduction from a junctional focus. A ventricular fusion beat results when a ventricular beat coincides with a sinus beat, a ventricular ectopic beat, or a junctional beat.
junctional beat an ectopic beat originating at the atrioventricular junction; see also junctional rhythm.
premature beat a cardiac event resulting from discharge by an atrial, junctional, or ventricular focus before the next expected sinus beat and at an interval from the last sinus beat that is shorter than its own intrinsic rhythm.
reciprocal beat a heartbeat resulting from an atrial or ventricular complex caused by a return of an impulse to its chamber of origin; called also echo beat.
sinus beat a heartbeat with sinus rhythm.
ventricular beat an ectopic beat originating in a ventricle.

ex·tra·sys·to·le

(eks'tră-sis'tō-lē),
A nonspecific word for an ectopic beat from any source in the heart.

premature beat

Etymology: L, praematurus, too soon; AS, beatan
an electrocardiogram deflection or complex that occurs earlier than expected in the ongoing rhythm pattern. Also called premature complex, premature impulse.

beat

a throb or pulsation, as of the heart or of an artery.

apex beat
the palpable shock caused by the apex of the heart beating against the chest wall with each systole and felt over the apex of the heart, normally in the fifth left intercostal space. May be replaced by a thrill.
Enlarge picture
Palpitation of the apex beat. By permission from Hinchcliff KW, Kaneps AJ, Equine Sports Medicine and Surgery, Saunders, 2004
capture b's
occasional ventricular responses to a sinus impulse that reaches the atrioventricular node in a nonrefractory phase.
ectopic beat
a heartbeat originating at some point other than the sinus node.
escaped b's
heartbeats that follow an abnormally long pause.
forced beat
an extrasystole produced by artificial stimulation of the heart.
fusion beat
in electrocardiography, the complex resulting when an ectopic ventricular beat coincides with normal conduction to the ventricle.
premature beat
an extrasystole.
References in periodicals archive ?
Some causes of bigeminal rhythm * Alternate beats are premature: atrial, ventricular, junctional * Nonconducted atrial premature beats after every second QRS * Sinus rhythm with 3:2 atrioventricular block: Wenckebach, Mobitz II * Other supraventricular rhythms with 3:2 atrioventricular block * Atrial flutter with alternating 2:1 and 4:1 block * 3:2 exit block: sinoatrial; escape rhythms--atrial, junctional, ventricular; accelerated rhythms--atrial, junctional, ventricular * Escape-capture bigeminy with escape focus: atrial, junctional, ventricular, electronic pacemaker * Atrial tachyarrhythmias with 3:2 atrioventricular response of an electronic pacemaker
GE's Heart Rate Turbulence algorithm measures and compares the heart rate before and after premature beats, providing comparison data used to measure how the patient's heart and autonomic nervous system work together, which can determine cardiac health.
Premature ventricular beats are usually asymptomatic, and it appears that isolated premature beats themselves in the setting of MI, regardless of frequency or multiformity, are not associated with an increased risk of sustained ventricular tachyarrhythmia.
A study of myocardial excitation features under ventricular premature beats in animals with the multifocal activation pattern of the ventricular myocardium is of significant interest for comparative and comprehensive electrocardiology.
Moroe et al (5) have reported that in patients with CAVB associated with prolonged QTc interval frequent ventricular premature beats might induce TdP.