The Purkinje system (PS) and the His bundle have been recently implicated as an important driver of the rapid activation rate after 1-2 minutes of ventricular fibrillation (VF). It is unknown whether activations during VF propagate through the His-Purkinje system to other portions of the the working myocardium (WM). Little is known about restitution characteristic differences between the His bu...

14. Fisch C, Zipes DP, McHenry PL: Rate dependent aberrancy. Circulation 48: 714, 1973 15. Denes P, Wu D, Dhingra RC, Amat-y-Leon F, Wyndham C, Rosen KM: Electrophysiological observations in patients with rate dependent bundle branch block. Circulation 51: 244, 1975 16. Wu D, Denes P, Dhingra R, Rosen KM: Bundle branch block. Demonstration of the incomplete nature of some "complete" bundle bran...

fibre is the re-dimensional complex projective space (complex projective co-tangent bundle). This bundle of complex dimension 2re + l is our M. Considering the fibre of T(V) as the (2w+2)-dimensional real vector space, we take as P the co-tangent sphere bundle over V (i.e., the fibre of P is a sphere in the fibre of T(V)). T(V) — V is the principal fibre bundle associated with a line bundle L o...

We give a new construction of the holonomy groupoid regular foliation in terms partial connection on diffeological principal bundle germs transverse parametrisations, which may be viewed as systematisation Winkelnkemper’s original using ideas from gauge theory. extend these to construct novel for any foliated bundle, we prove sits at top hierarchy jet groupoids associated with bundle. This show...

Given a vector bundle on P1 bundle, the base is stratified by degeneracy loci measuring splitting type of restricted to each fiber. The classes these in Chow ring or cohomology are natural invariants characterizing degenerations bundle. When occur expected codimension, we find their classes. This yields universal formulas for terms naturally arising bundles base. existence applied prove non-emp...

BACKGROUND Anatomic double-bundle reconstruction has been thought to better simulate the anterior cruciate ligament anatomy. It is, however, a technically challenging procedure, associated with longer operation time and higher cost. HYPOTHESIS Double-bundle anterior cruciate ligament reconstruction using a single femoral and tibial tunnel can closely reproduce intact knee kinematics. STUDY ...

BACKGROUND Several trials have compared the clinical results between anatomic double-bundle and single-bundle anterior cruciate ligament reconstruction procedures. However, it remains controversial whether the anatomic double-bundle procedure is superior to the single-bundle procedure. HYPOTHESIS The anatomic double-bundle procedure will be better than the single-bundle procedure at resisting...

1. Clark J, Plonsey R: A mathematical evaluation of the core conductor model. Biophys J 6: 95, 1966 2. Weidmann S: The diffusion of radiopotassium across the intercalated disks of mammalian cardiac muscle. J Physiol 187: 323, 1966 3. Sperelakis N, Hoshiko T, Berne RM: Nonsyncytial nature of cardiac muscle: membrane resistance of single cells. Am J Physiol 198: 531, 1960 4. Plonsey R: Bioelectri...

Cotangent bundle reduction theory is a basic and well developed subject in which one performs symplectic reduction on cotangent bundles. One starts with a (free and proper) action of a Lie group G on a configuration manifold Q, considers its natural cotangent lift to T ∗Q and then one seeks realizations of the corresponding symplectic or Poisson reduced space. We further develop this theory by ...

A twenty year follow up of a selected, community population with complete right and left bundle branch block is reviewed by comparative mortality analysis. In this population, where cases and controls were free of hypertension and heart disease at entry, the presence of complete right bundle branch block does not have excess mortality. Complete left bundle branch block exhibits excess total and...