Ventricular Fusion Beats

@article{Marriott1962VentricularFB,
  title={Ventricular Fusion Beats},
  author={Henry J. L. Marriott and N. L. Schwartz and Harold H. Bix},
  journal={Circulation},
  year={1962},
  volume={26},
  pages={880–884}
}
Relatively precise criteria are proposed for the recognition of ventricular fusion beats. Apart from the obvious and widely accepted criteria involving contour, duration, and time of appearance, other less obvious characteristics have been adduced: (1) the P-S time of the fusion beat must always be considerably longer than the P-R interval of the component sinoatrial beat; (2) the P-R interval of the fusion beat is generally not more than 0.06 second shorter than the sinoatrial P-R; (3) the… Expand
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References

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Fusion beats and their relation to the syndrome of short P-R interval associated with a prolonged QRS complex
Abstract Fusion ventricular complexes were produced in animals by a method which allows accurate spacing of stimuli over short time intervals in successive cardiac cycles. The time during whichExpand
Zones of potential interference, dissociation, and fusion: with observations on the contour of retrograde P waves.
TLDR
It is suggested that the frequently observed absence of sinus P waves on the upstroke of the T wave of ventricular premature beats may be explained by the occurrence of atrial fusion beats at that time. Expand
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