Hemal V. Shah

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The boundary between the network edge and the front-end servers of the data center is blurring. Appliance vendors are flooding the market with new capabilities, while switch/router vendors scramble to add these services to their traditional transport services. The result of this competition is a set of ad-hoc technologies and capabilities to provide(More)
BACKGROUND Determination of pulmonary vascular resistance (PVR) in patients with suspected or known pulmonary hypertension (PH) requires right heart catheterization. Our purpose was to use Doppler echocardiography to estimate PVR in patients with PH. METHODS Patient population consisted of 52 patients (53 +/- 12 years; 35 females) who underwent Doppler(More)
BACKGROUND Since the 2009 revised advisory statement regarding Sprint Fidelis® Defibrillator Lead failure rates (Medtronic Inc., Minneapolis, MN, USA), there has been a significant increase in revision of these leads. We sought to establish the frequency of major procedural complications and determine what patient characteristics were associated with these(More)
Vertical diodes with breakdown voltages up to 2.6kV have been fabricated on bulk GaN substrates. The measured figures-of-merit of these devices show performance near the theoretical limit of GaN. These vertical GaN diodes exhibit robust avalanche breakdown behavior with a positive temperature coefficient. System-level performance advantages have been(More)
A network port profile is an XML document that describes a set of networking attributes that can be applied to Ethernet ports and virtual Ethernet switches. This paper describes network port profile XML schema and Open Virtualization Format (OVF) standards based provisioning and deployment models for virtual networking components that address challenges(More)
BACKGROUND Myocardial recovery after ventricular assist devices (VAD) is rare but appears more common in nonischemic cardiomyopathies (NICM). We sought to evaluate left ventricular (LV) end diastolic diameter (LVEDD) for predicting recovery after VAD. METHODS AND RESULTS NICM patients receiving long-term mechanical support between 1996 and 2008 were(More)
OBJECTIVES The objective of this study was to correlate tissue Doppler imaging of the right ventricle (RV) with pulmonary hemodynamics in patients referred for right heart catheterization. METHODS Seventy subjects (mean age 54 +/- 13; 35 males) prospectively underwent tissue Doppler imaging of the RV and right heart catheterization within 1 day of each(More)
BACKGROUND There is a scarcity of cardiac tissue available for research. OBJECTIVE (1) To investigate the feasibility of obtaining myocardial tissue from extracted pacemaker and defibrillator leads for gene expression analysis and (2) to examine the nitric oxide 1 adaptor protein (NOS1AP) RNA expression as a function of patient genotype. METHODS(More)
Patients diagnosed with Recessive Dystrophic Epidermolysis Bullosa (RDEB) suffer from severe growth inhibition due to reduced food intake as a result of severe oropharyngeal and esophageal blistering. This investigation examined the patterns of facial growth in a group of 42 children with RDEB for whom lateral skull radiographs were available. The(More)