A 73-year-old woman with presyncope and frequent episodes of symptomatic 2:1 atrioventricular block underwent implantation of a dual-chamber MRI-conditional pacing system (Advisa MRI SureScan pacing system, Medtronic, Minneapolis, MN) to facilitate cardiovascular magnetic resonance (CMR) assessment of apparent isolated right ventricular (RV) hypertrophy seen on transthoracic echocardiography (F...

Introduction Cardiac resynchronization therapy (CRT) achieved by implanting a lead via the coronary sinus (CS) system significantly improves well-being, symptoms, morbidity, and mortality in appropriately selected populations with advanced heart failure (HF) or pacing-induced cardiomyopathy. Despite improvements in implant technique, lead design, and pacing algorithms, there still remains a sig...

BACKGROUND Electric left ventricular lead position, assessed by the electric delay from the beginning of the QRS complex to the local LV electrogram (QLV), was found in previous studies to be a strong predictor of short-term response to cardiac resynchronization therapy. We hypothesized that suboptimum electric position of the left ventricular lead is associated with an excess of heart failure ...

Syncopal attacks in patients with bifascicular block may be due to both ventricular tachyarrhythmias and intermittent atrioventricular block in addition to non-cardiac causes and lead to antiarrhythmic treatment with drugs or pacemaker or both. The acute electrophysiological effect of intravenous disopyramide 2 mg/kg body weight given over five minutes on the His-Purkinje system was assessed in...

At CRYPTO 2012, Knellwolf and Khovratovich presented a differential formulation of advanced meet-in-the-middle techniques for preimage attacks on hash functions. They demonstrated the usefulness of their approach by significantly improving the previously best known attacks on SHA-1 from CRYPTO 2009, increasing the number of attacked rounds from a 48-round one-block pseudo-preimage without paddi...

Case Report An 89-year-old man had a left-sided dual-chamber pacemaker (Symphony DR; Sorin CRM, Clamart, France) implanted for syncope, second-degree Mobitz II heart block, and periodic third-degree heart block. He was found to have an abrupt increase in right ventricular lead impedance and high capture thresholds, consistent with an impending lead fracture. Owing to occlusion of the left innom...

An eye with angle closure glaucoma is anatomically characterized by a short axial length, a shallow anterior chamber, a thickened lens that is situated relatively anteriorly and a small corneal diameter. These conditions may lead to the development of relative pupillary block. Pupillary block is classically managed with a peripheral iridectomy which provides a route for the aqueous to drain. Bu...

This paper deals with the problem of constructing superregular matrices that lead to MDP convolutional codes. These matrices are a type of lower block triangular Toeplitz matrices with the property that all the square submatrices that can possibly be nonsingular due to the lower block triangular structure are nonsingular. We present a new class of matrices that are superregular over a sufficien...