Ectopic rhythms with impulse frequency of 60-90 per minute are referred to as "accelerated"; those with the frequency of 91-130 impulses per minute are termed "nonparoxysmal tachycardia". Forty patients (27 with nonparoxysmal tachycardia and 13 with accelerated ectopic rhythms) were under observation. Accelerated rhythms were nearly always free of clinical symptoms and did not require an anti-arrhythmia treatment. Nonparoxysmal supraventricular and ventricular tachycardia was usually accompanied by aggravation of the patient's condition. Nonparoxysmal tachycardia turned to paroxysmal one or vice versa in 7 patients. Cordarone, beta-adrenergic agents and isoptin were particularly effective in the treatment of nonparoxysmal supraventricular tachycardia, while ethmosine, cordaron and rhythmodan proved most effective against ventricular arrhythmia.
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