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  • noun

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a premature systole resulting in a momentary cardiac arrhythmia

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References in periodicals archive ?
2+] load which is responsible for the generation of delayed after depolarizations (DADs), which, if sufficiently large, may achieve threshold and generate spontaneous action potentials, leading to extrasystoles and ventricular arrhythmias.
Holter ECG device Syneflash Card MinHR/24h revealed findings composed of an hour intervals of the heart-rate, pause, missed beats, supraventricular extrasystoles (isolated and couplet), ventricular extrasystoles (isolated and couplet), total extrasystoles and ST segment deviations each.
The other developed a Brugada ECG and frequent ventricular extrasystoles that evolved into ventricular tachycardia and repetitive ventricular arrhythmias (electrical storm) (20).
Twelve patients had hemodynamic instability that required vasoconstrictors and 6 had arrhythmias, mainly supraventricular and ventricular extrasystoles.
2002) Increasing plasma potassium with amiloride shortens the QT interval and reduces ventricular extrasystoles but does not change endothelial function or heart rate variability in chronic heart failure.
In levosimendan treated patients extrasystoles were reported in 1.
1% of patients: cardiac failure, pulse irregularity, extrasystoles, skin discoloration, urticaria, skin dryness, alopecia, dermatitis, muscle weakness, twitching, ataxia, hypertonia, migraine, cold and clammy skin, apathy, agitation, amnesia, gastritis, increased appetite, loose stools, coughing, rhinitis, dysuria, polyuria, parosmia, taste perversion, abnormal visual accommodation, and xerophthalmia.
The investigators found 55% were in sinus rhythm and 43% had isolated extrasystoles.
3) Arrhythmias that characterize ARVC include idiopathic ventricular fibrillation, ventricular extrasystoles, supraventricular tachycardia, (4) and ventricular tachycardia of right ventricular origin (with a left bundle branch pattern).
Moreover, fewer patients had ST-segment depressions, arrhythmias, and ventricular extrasystoles during treatment.
Atrioventricular (AV) block, premature cardiac contraction, arrhythmia, vomiting Disopyramide/Norpace [R] Apnea, arrhythmias, loss of consciousness Flecainide/Tamboco [TM] Nausea, vomiting, hypotension, syncope bradycardia, heart failure Lidocaine/Xylocaine [R] Cardiovascular depression, convulsions, hypoxia Mexiletine/Mexitil [R] Nausea, hypotension, sinus bradycardia, paresthesia, seizures, left branch bundle block, asystole Procainamide/Procanbid [R] Ventricular extrasystoles and tachycardia Propafenone/Rythmol [R] Supraventricular tachycardia, atrial flutter, tinnitus, apnea Quinidine/Quinidex [R], etc.