A non-optimized interface band alignment in a heterojunction-based solar cell can have negative effects on the current and voltage characteristics of the resulting device. To evaluate the use of Near Edge X-ray Absorption Fine Structure spectroscopy (NEXAFS) as a means to measure the conduction band position, Cu(In,Ga)S2 chalcopyrite thin film surfaces were investigated as these form the absorb...

This paper presents a study of sequence specific electronic conduction through short (15-base-pair) double-stranded (ds) DNA molecules, measured by immobilizing 3′-thiol-derivatized DNAs in nanometre scale gaps between gold electrodes. The polycation spermidine was used to stabilize the ds-DNA structure, allowing electrical measurements to be performed in a dry state. For specific sequences, th...

OBJECTIVES This study sought to evaluate the impact of new conduction defects after transcatheter aortic valve implantation (TAVI) on the evolution of left ventricular (LV) function during 1-year follow-up. BACKGROUND New left bundle branch block (LBBB) or need for permanent pacing due to atrioventricular (AV) block are frequent after TAVI. METHODS A total of 90 consecutive patients treated...

Aberrant ventricular conduction definition: It is a term applied to alterations in QRS contour of supraventricular beats resulting from impulse transmition during periods of physiologic refractoriness and/or depressed conductivity. The supraventricular electrical impulse is conducted abnormally through the ventricular conducting system. This results in a wide QRS complex that may be confused wi...

We report a patient with atrioventricular (AV) nodal reentry in which a 2:1 infra-His conduction block was demonstrated during tachycardia. The electrocardiogram (ECG) at the time of attack showed two types of supraventricular tachycardias. The first type was a narrow QRS tachycardia associated with 1:1 AV conduction at a rate of 170 beats/minute. The second type was a narrow QRS associated wit...

With the use of a double stimulus technique, nerve fibre velocity range measurements were performed over a single conduction distance in 13 normal subjects and over two conduction distances in another 12 normal subjects. The velocity ranges were found to be dependent upon the conduction distance, owing to unknown refractory period delays. Refractory period values were calculated for the 12 subj...

Conduction slowing of the electric impulse that drives the heartbeat may evoke lethal cardiac arrhythmias. Mutations in SCN5A, which encodes the pore-forming cardiac sodium channel alpha subunit, are associated with familial arrhythmia syndromes based on conduction slowing. However, disease severity among mutation carriers is highly variable. We hypothesized that genetic modifiers underlie the ...