[Sinostrial node initial block after digoxin--unmasking by double and multiple stimulation].
After intravenous application of 1 mg digoxin in a 28-year-old patient with condition after myocarditis by means of premature atrial individual stimulation a SA-block I. type II was observed. Also in extremely premature stimuli the post-extrasystolic pauses remained compensating. After atrial double and multiple stimulation--a new method for the calculation of the sinuatrial conduction time--totally irregular poststimulation pauses appeared, which were regarded as an expression of a sinoauricular node initial block. Other possibilities of explanation are discussed.
D000328:Adult; D002304:Cardiac Pacing, Artificial; D004077:Digoxin / Q000009:adverse effects*; D006327:Heart Block / Q000139:chemically induced*; D006801:Humans; D008297:Male; D009205:Myocarditis / Q000188:drug therapy; D012848:Sinoatrial Block / Q000139:chemically induced* / Q000175:diagnosis; D012849:Sinoatrial Node / Q000503:physiopathology; D013997:Time Factors
D004077:Digoxin
Sinusknoten-Eintrittsblock nach Digoxin--Demaskierung mittels atrialer Doppel- und Mehrfachstimulation.