extrasystole


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

ex·tra·sys·to·le

 (ĕk′strə-sĭs′tə-lē)
n.
A premature contraction of the heart, resulting in momentary cardiac arrhythmia.

ex′tra·sys·tol′ic (-sĭ-stŏl′ĭk) adj.

extrasystole

(ˌɛkstrəˈsɪstəlɪ)
n
an abnormal heartbeat

ex•tra•sys•to•le

(ˌɛk strəˈsɪs tə li)

n., pl. -les.
a premature contraction of the heart, resulting in momentary interruption of the normal heartbeat.
[< German (1899)]
ex`tra•sys•tol′ic (-ˈtɒl ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.extrasystole - a premature systole resulting in a momentary cardiac arrhythmia
systole - the contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery
Translations

ex·tra·sys·to·le

n. extrasístole, contraccion del corazón que ocurre premauramente e interrumpe el ritmo normal.
Mentioned in ?
References in periodicals archive ?
Electrocardiographic abnormalities have been noted in 38-91% of cases and include bundle branch block (right, left) in 25%, atrioventricular block in 8%, atrial fibrillation in 2-6%, extrasystole (atrial and ventricular) in 18% and ventricular fibrillation in 2%.
This mechanism can induce several types of arrhythmias, such as supraventricular tachycardia, sinus tachycardia, supraventricular extrasystole, atrial extrasystole, and ventricular extrasystole.
If this occurs while an excitation before the end of systole, it causes an extra systole, which was called extrasystole effort.
In a study, the frequencies of ECG abnormalities such as QT prolongation and ventricular extrasystole were higher in patients with SSc.
Table-II: Distribution of burnout and anxiety score means in terms of the presence atrial and ventricular extrasystole.
ECG changes: Prolonged QTc interval, ST segment elevation, low amplitude T waves, extrasystole and prolonged PR interval [77].
Delayed sympathetically mediated vasomotor response to the initial loss of cardiac output after ventricular extrasystole produces systolic blood pressure overshoot that subsequently induces vagally mediated late heart rate deceleration.
The susceptibility to ventricular arrhythmias can be explained by the imbalance of currents creating a vulnerable window during which time an extrasystole can trigger a phase 2 re-entry arrhythmia (9).
In the heart activity, for example, it is exposed as ventricle extrasystole and compensating pause afterwards.
Improvements also were seen in blood pressure, exercise tolerance, ejection fraction, and the incidence of ST-segment depression, arrhythmia, and ventricular extrasystole.
Shock waves also can trigger extrasystole rhythms, requiring ECG synchronization.