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A triple cadence to the heart sounds; due to an abnormal third or fourth heart sound being heard in addition to the first and second sounds, and usually indicative of serious disease.
Etymology: Canterbury gallop; Gk, rhythmos, beat
a pattern of three heart sounds in each cardiac cycle, resembling the canter of a horse. See also gallop.
gal·lop, gallop rhythm (gal'ŏp, ridh'ŭm)
rhythm(rith'im) [Gr. rhythmos, measured motion]
1. A measured time or movement; regularity of occurrence of action or function.
2. In electroencephalography, the regular occurrence of an impulse. rhythmic (-mik), adjective
accelerated idioventricular rhythmAbbreviation: AIVR
An abnormal ectopic cardiac rhythm originating in the ventricular conducting system. This may occur intermittently after myocardial infarction at a rate of 60 to 100 beats per minute. In this setting it is considered to be an indicator of successful reperfusion of the blocked coronary artery.
In electroencephalography, oscillations in electric potential occurring at a rate of 8 1 2 to 12 per second.
The rhythmic discharges of impulses from the atrioventricular node that occur when the activity of the sinoatrial node is depressed or abolished. Synonym: nodal rhythm
In electroencephalography, waves ranging in frequency from 15 to 30 per second and of lower voltage than alpha waves. This rhythm is more pronounced in the frontomotor leads.
The coupling of extrasystoles with previously normal beats of the heart.See: bigeminal pulse
The regular occurrence of certain phenomena in living organisms.See: circadian rhythm; biological clock
The predominant electrical activity of the heart. It may be determined by recording an electrocardiogram or by evaluating tracings made by a cardiac monitor.See: cardiac cycle; electrocardiogram; conduction system of the heart
Diverse yet predictable changes in physiological variables, including sleep, appetite, temperature, and hormone secretion, over a 24-hr period. Synonym: diurnal rhythm
A rhythm in which every other heartbeat produces no pulse at the wrist.
In electroencephalography, slow waves with a frequency of 4 or fewer per second and of relatively high voltage (20 to 200 µV). It may be found over the area of a gross lesion such as a tumor or hemorrhage.
diurnal rhythmCircadian rhythm.
A heart rhythm originating outside the sinoatrial node.
A heart rhythm that arises from a junctional or ventricular source when impulses from the atria or atrioventricular node are blocked.
The 50-per-second rhythm seen in the electroencephalogram.
A cardiac rhythm that arises from pacemakers in ventricular muscle.
An electrocardiographic rhythm arising in the atrioventricular junction. It appears as an electrocardiogram as a narrow QRS complex that lacks an upright P wave preceding it.
normal sinus rhythm
The normal heart rhythm whose pacemaker is in the sinoatrial node and whose conduction through the atria, atrioventricular node, and ventricles is unimpaired. The interval between complexes is regular, the ventricular rate is 60 to 100, there are upright P waves in leads I and II, a negative P wave in lead AVR, a P-R interval of 0.12 to 0.20 sec, and one P wave preceding each QRS complex. Synonym: sinus rhthym
Day and night rhythm.
In emergency cardiac care, any of the following cardiac rhythm disturbances: ventricular fibrillation, pulseless ventricular tachycardia or some poorly tolerated supraventricular tachycardias, e.g., some instances of rapid atrial fibrillation, atrial flutter, or AV nodal re-entrant tachycardia. By contrast, asystole, pulseless electrical activity, heart blocks, and the bradycardias are not shockable. Defibrillation or cardioversion of these latter rhythms may result in injury to the patient.
sinus rhythmNormal sinus rhythm.
The 4- to 7-per-second rhythm seen in the electroencephalogram.
1. The pace and synchrony of ventricular depolarization.
2. An escape rhythm that arises in the ventricles, typically with wide QRS complexes and a rate of 30 to 40 beats per minute.