extrasystole

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ex·tra·sys·to·le

(ĕk′strə-sĭs′tə-lē)

A premature contraction of the heart, resulting in momentary cardiac arrhythmia.

ex′tra·sys·tol′ic (-sĭ-stŏl′ĭk) adj.

extrasystole

(ˌɛkstrəˈsɪstəlɪ)

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.

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Noun

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.

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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%.

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This mechanism can induce several types of arrhythmias, such as supraventricular tachycardia, sinus tachycardia, supraventricular extrasystole, atrial extrasystole, and ventricular extrasystole.

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If this occurs while an excitation before the end of systole, it causes an extra systole, which was called extrasystole effort.

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In a study, the frequencies of ECG abnormalities such as QT prolongation and ventricular extrasystole were higher in patients with SSc.

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ECG changes: Prolonged QTc interval, ST segment elevation, low amplitude T waves, extrasystole and prolonged PR interval [77].

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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.

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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).

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In the heart activity, for example, it is exposed as ventricle extrasystole and compensating pause afterwards.

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Improvements also were seen in blood pressure, exercise tolerance, ejection fraction, and the incidence of ST-segment depression, arrhythmia, and ventricular extrasystole.

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Shock waves also can trigger extrasystole rhythms, requiring ECG synchronization.