Better outcome of ablation for sustained outflow-tract ventricular tachycardia when tachycardia is inducible.

AIMS In patients presenting with spontaneous sustained ventricular tachycardia (VT) from the outflow-tract region without overt structural heart disease ablation may target premature ventricular contractions (PVCs) when VT is not inducible. We aimed to determine whether inducibility of VT affects ablation outcome. METHODS AND RESULTS Data from 54 patients (31 men; age, 52 ± 13 years) without overt structural heart disease who underwent catheter ablation for symptomatic sustained VT originating from the right- or left-ventricular outflow region, including the great vessels. A single morphology of sustained VT was inducible in 18 (33%, SM group) patients, and 11 (20%) had multiple VT morphologies (MM group). VT was not inducible in 25 (46%) patients (VTni group). After ablation, VT was inducible in none of the SM group and in two (17%) patients in the MM group. In the VTni group, ablation targeted PVCs and 12 (48%) patients had some remaining PVCs after ablation. During follow-up (21 ± 19 months), VT recurred in 46% of VTni group, 40% of MM inducible group, and 6% of the SM inducible group (P = 0.004). Analysis of PVC morphology in the VTi group further supported the limitations of targeting PVCs in this population. CONCLUSION Absence of inducible VT and multiple VT morphologies are not uncommon in patients with documented sustained outflow-tract VT without overt structural heart disease. Inducible VT is associated with better outcomes, suggesting that attempts to induce VT to guide ablation are important in this population.

Papers presented at the Census Tract Conference on September 10, 1965 at Philadelphia, Pa.

Mode of access: Internet.

Joannes Matthaeus and his tract "De rerum inventoribus".

Pt. I, read before the Society Dec. 4, 1901; Pt. II, read Dec. 18, 1916.

England and France in the fifteenth century. The contemporary Franch tract entitled "The debate between the heralds of France and England," presumed to have been written by Charles, duke of Orleans: translated for the first time into English; with an introduction, notes, an inquiry into the authorship, etc.

Mode of access: Internet.

Fabian tract /

Latest issue consulted: 541, published in 1990.

Tract.

No. 5 included in English history pamphlets, vol. 22.

Census tract location guide; Detroit standard metropolitan statistical area (1960 census tracts and population from the U.S. Bureau of the census)

Mode of access: Internet.

Doctoris Ioannis de Selva iuris utriusque doctoris, quondam in Suprema Parisiensi Curia Consilarij, & tandem, ut alij existimant, primi Praesidis Tract. de Beneficio : cum notis et quibusdam additionibus celebris in magno Regis Consilio Aduocati, praxis beneficiariae peritissimi.

Mode of access: Internet.

An American tract for the times : being an humble but earnest plea in behalf of common sense /

Tryon and Charvat

Census tract project, Flint and Genesee County.

Cover title.

A tract upon tomb-stones; or Suggestions for the consideration of persons intending to set up that kind of monument to the memory of deceased friends.

Author's name on cover.

The articles treated on in Tract 90 reconsidered : and their interpretation vindicated in a letter to the Rev. R.W. Jelf ; with an appendix from Abp. Ussher on the difference between ancient and modern addresses to saints /

Tract no. 90, by J.H. Newman, has title, Remarks on certain passages in the Thirty-nine articles.

The objects and limits of operations for cancer : with special reference to cancer of the breast, mouth and throat, and intestinal tract : being the Lettsomian lecture for 1896 /

"Reprinted from the Transactions of the Medical Society of London, vol. xix"--T.p. verso

Plan of forest management for the Cayuta Lake tract, Schuyler County, N.Y.

Mode of access: Internet.

Spiders of the University of Kansas, Natural History Reservation and Rockefeller Experimental Tract.

Bibliography: p. 200-202.