Wagner_Marriot's Practical Electrocardiography, 12e

GLOSSARY

Bundle of Kent: a congenital abnormality in which a bundle of myocardial fibers con- nects the atria and the ventricles. Delta wave: a slowing of the initial aspect of the QRS complex caused by premature exci- tation (preexcitation) of the ventricles via a bundle of Kent. Fusion beat: activation of the ventricles by two different wavefronts, resulting in an abnor- mal appearance of the QRS complexes on the ECG.

Preexcitation premature activation of the ven- tricular myocardium via an abnormal AV path- way called a “bundle of Kent.” Tachyarrhythmia: an abnormal cardiac rhythm with a ventricular rate 100 beats per minute. Wolff–Parkinson–White syndrome: the clin- ical combination of a short PR interval, an increased duration of the QRS complex caused by an initial slow deflection (delta wave), and supraventricular tachyarrhythmias.

REFERENCES

6. Rosenbaum FF, Hecht HH, Wilson FN, et al. Potential variations of thorax and esophagus in anomalous atrioventricular excitation (Wolff-Parkinson-White syn- drome). Am Heart J . 1945;29:281–326. 7. Gallagher JJ, Gilbert M, Svenson RH, et al. Wolff-Parkinson-White syndrome: the prob- lem, evaluation, and surgical correction. Circulation . 1975;51:767–785. 8. Milstein S, Sharma AD, Guiraudon GM, et al. An algorithm for the electrocardiographic localization of accessory pathways in the Wolff-Parkinson-White syndrome. Pacing Clin Electrophysiol . 1987;10:555–563. 9. Tonkin AM, Wagner GS, Gallagher JJ, et al. Initial forces of ventricular depolarization in the Wolff-Parkinson-White syndrome: analysis based upon localization of the accessory pathway by epicardial mapping. Circulation . 1975;52:1030–1036.

1. Kent AFS. Research on the structure and function of the mammalian heart. J Physiol . 1893;14:233. 2. Wolff L. Syndrome of short P-R interval with abnormal QRS complexes and parox- ysmal tachycardia (Wolff-Parkinson-White syndrome). Circulation . 1954;10: 282. 3. Becker AE, Anderson RH, Durrer D, et al. The anatomical substrates of Wolff- Parkinson-White syndrome. Circulation . 1978;57:870–879. 4. Giardina ACV, Ehlers KH, Engle MA. Wolff-Parkinson-White syndrome in infants and children: a long term follow up study. Br Heart J . 1972;34:839–846. 5. Goudevenos JA, Katsouras CS, Graeklas G, et al. Ventricular preexcitation in the general population: a study on the mode of presentation and clinical course. Heart . 2000;83:29–34.

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CHAPTER 7: Ventricular Preexcitation