(n.) Two taken together; a pair or couple; especially two lines of verse that rhyme with each other.
Example Sentences:
(1) Propranolol therapy abolished ventricular couplets in eight of twelve patients and ventricular tachycardia in four of the patients.
(2) In 78 consecutive patients with uniform ventricular ectopic complexes and without heart disease, ventricular couplets were present significantly more often when the coupling interval of ventricular ectopic complexes was variable than when it was fixed (P less than 0.04).
(3) "I saw Hutton in his prime; another time, another time," as his couplet about his cricketing hero, Sir Leonard Hutton, has it.
(4) Arrhythmias in form of supraventricular and ventricular extrasystoles including bigeminy and couplets of VES in one patient and two episodes of atrial tachycardia in another one on the day of drug injection were noticed.
(5) We examined the extracellular equilibrium status of two redox couplets normally found in plasma (lactate-pyruvate [L-P], beta-hydroxybutyrate, and acetoacetate) during acute metabolic acidosis produced by muscle exertion.
(6) Imitating the white, vaudeville television love-to-hate wrestler Gorgeous George, his forecasts bragged the precise round he was going to win, sometimes combining such box-office larks with couplets of doggerel.
(7) In 4 patients with coronary heart disease associated with arrhythmia guanfacine 1 mg per day during 10 days decreased ventricular premature contractions, couplets and abolished appearance of ventricular tachycardias.
(8) An initial preparation of rat hepatocytes containing approximately 30% couplets was enriched by centrifugal elutriation.
(9) Forty-eight recordings from 46 patients were identified which contained couplets, ventricular tachycardia or R-on-T extrasystoles.
(10) These findings demonstrate the utility of confocal line scanning microscopy for detecting rapid changes in the subcellular distribution of cytosolic Ca2+ in hepatocyte couplets, and suggest that phenylephrine-induced Ca2+ waves radiate in a basal-to-apical direction in this cell type.
(11) Our system was able to assign more cases to couplets then the NOHS-JEM (35,895 to 22,369).
(12) Efficacy of treatment determined by programmed stimulation (ventricular tachycardia no longer inducible or nonsustained) was compared with three Holter criteria of efficacy: I = 83% or more reduction of ventricular premature complexes and abolition of ventricular tachycardia; II = 50% or more reduction of ventricular premature complexes and 90% or more reduction of couplets and abolition of ventricular tachycardia; III = abolition of ventricular tachycardia in patients with ventricular tachycardia during a baseline Holter recording.
(13) Ventricular couplets or triplets (Lown grade IV) were found in less than 10% in patients in age from 15 to 17 years, 33% in patients from 18 to 20 years and showed no increase with age.
(14) Normal neutrophil membrane preparations containing beta-adrenergic receptors were exposed to several concentrations of three redox couplets native to plasma: lactate (L)-pyruvate (P), beta-hydroxybutyrate (BOHB)-acetoacetate (AcAc), and glutathione (GSH-GSSG).
(15) Treatment with flecainide alone resulted in a 38% mean reduction (p less than 0.05) of ventricular premature complexes, a 75% (p less than 0.01) mean reduction of couplets, and elimination of ventricular tachycardia.
(16) Multiformity was found in 27 (28%), couplets in 18 (19%) and ventricular tachycardia in 11 (11.5%).
(17) Patients without arrhythmia inducibility had a high incidence of multiformity (56%) and bigeminy (44%), but a low incidence of either couplets (11%) or spontaneous ventricular tachycardia (11%) on Holter monitoring.
(18) Malignant ventricular premature beats (ventricular couplets, ventricular tachycardia, and R-on-T-type ventricular premature beats) were observed in three of these four patients.
(19) This may explain the observation that the couplets are seldom followed by consecutive ventricular ectopic complexes or ventricular tachycardia.
(20) The effect of Bonnecor on couplets and volleys was clinically relevant in 52 and 46%, respectively, of the patients (reduction greater than or equal to 93%) and approximately corresponds to the results with other antiarrhythmic drugs.