Intermittent Atrial Parasystole

Intermittent atrial parasystole.

From the Rober t MA. Moore Heart Clinic, Marion County Genieral ITospital. aind the Department of iIediciie, indiama ITniversity, Selhool of Medicine, In(diallapolis, 111(1. Supported by the Krainnert Fuind of the lndianauua 11-eart Associationi, Indiana State Board of Health, mid the National Ileart Inistitute (PHS-HTS 5363), U. S. Puiiblic Health Serivice. each run is a preniature atrial syst...

Time relation between two pacemakers in atrial parasystole.

His bundle parasystole: A form of A-V junctional parasystole.

A 69-year-old man demonstrated continuous A-V junc-tional parasystole (A V m) over a three-week observation period. The parasystolic cycle length, although constant during each recording, changed proportionately and in parallel with the sines cycle length. Carotid sines massage lengthened the cycle length. During later recordings , the parasystolic impdse became less effective and only appeared...

Dynamics of pure parasystole.

A mathematical model is proposed for ventricular parasystole. In this model, there are two separate rhythms, a sinus rhythm and a ventricular ectopic rhythm. An ectopic beat will occur if the ectopic depolarization falls during a time interval when the ventricles are not refractory. Following an ectopic beat there is a compensatory pause. Analysis of this model, utilizing numerical simulation a...

Mechanisms of ventricular parasystole.

Eight cases of ventricular parasystole are reported. In all these cases, regardless of whether parasystole seems intermittent or "continuous," the presence of second degree entrance block of the Mobitz type I was suggested. Parasystole alternated with concealed extrasystolic bigeminy showing occasional reentrant extrasystoles. Such intermittent parasystole appears to originate in the reentrant ...