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Escape Rhythm in Complete A‐V Block. The Recovery Phase after Overdrive Suppression from Artificial Ventricular Pacing
Author(s) -
GRENDAHL HELGE,
KJEKSHUS JOHN,
SOYLAND EINAR,
SIVERTSSEN EGIL
Publication year - 1979
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1979.tb05221.x
Subject(s) - medicine , rhythm , cardiology , impulse (physics) , ventricular pacing , block (permutation group theory) , anesthesia , basal (medicine) , heart block , electrocardiography , heart failure , mathematics , physics , geometry , quantum mechanics , insulin
The recovery phase after overdrive suppression from artificial ventricular pacing. In 60 patients with third degree A‐V block, recovery of escape rhythm from overdrive suppression after ventricular pacing has been studied. Implanted unipolar VVI pacemakers were inhibited by chest wall stimuli. A total of 165 rhythmograms were studied. In 37, the rate was irregular, in the other 128 the escape rate increased gradually, following an exponential curve until stabilization after 3 minutes. In 29 of these rhythmograms, a possible exit block of the first escape impulse was observed. In 99 rhythmograms without exit block, escape rhythm recovery time was on an average 1.45 times basal escape RR intervals. Overdrive suppression was most marked in patients with a slow escape rhythm.