Postextrasystolic potentiation and its contribution to the beat-to-beat variation of the pulse during atrial fibrillation.

@article{Hardman1992PostextrasystolicPA,
  title={Postextrasystolic potentiation and its contribution to the beat-to-beat variation of the pulse during atrial fibrillation.},
  author={Suzanna M C Hardman and Mark I M Noble and W. A. Seed},
  journal={Circulation},
  year={1992},
  volume={86 4},
  pages={
          1223-32
        }
}
BACKGROUND Beat-to-beat variations in the pulse during atrial fibrillation (AF) have conventionally been attributed to time-dependent changes in filling. We have explored the possibility that they are dependent on the intrinsic myocardial interval force relation. METHODS AND RESULTS Left ventricular (LV) contractility (maximum rate of rise of pressure, LV dP/dtmax) and ascending aortic blood velocity were measured during cardiac catheterization in 15 patients with AF. Beats preceded by an… CONTINUE READING

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