Membrane depolarization is caused by both gradual and rapid ventricular stretch, but PVEs are more easily elicited by rapid stretch. Regions of greater myocardial compliance that experience greater relative stretch may act as "foci" for stretch-activated arrhythmias during dynamic ventricular loading. These whole-heart data corroborate the existence of stretch-activated membrane channels in ventricular myocardium and may help explain ventricular ectopy under conditions of differential ventricular loading, as in ventricular dyskinesia, or regional muscle traction, as in mitral valve prolapse syndrome.
Presented are some solutions for the transient behavior of a two-fluid direct-transfer counterflow gas-turbine regenerator, obtained experimentally using an electrical analog system. While restrictions were imposed on certain parameters with the gas-turbine-regenerator problem in mind, these results, presented in nondimensional form, are also of limited use for other two-fluid exchanger problems. A set of seven independent nondimensional parameters is proposed for general use. These include the three commonly associated with the steady-state performance plus four additional parameters unique to the transient problem. The electrical analog system is described in the Appendix and the associated experimental uncertainties are considered.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.