Abstract: Various embodiments concern an electrode of an implantable medical device for delivering electrical stimulation to tissue. Such an electrode can include a main body formed from a substrate metal comprising one of titanium, stainless steel, a cobalt-chromium alloy, or palladium. The main body may not be radiopaque. The electrode may further include a first coating on at least one side of the main body, the first coating comprising a layer of one of tantalum or iridium metal that is at least about 2 micrometers thick. The first coating can be radiopaque and porous. The porosity of the first coating can increase the electrical performance of the electrode in delivering electrical stimulation to tissue.

Abstract: In one aspect, a first request is received at a configuration server for access to a first virtual test environment. The first request is received from a first client device over a network and specifies one or more configuration options associated with the first virtual test environment. It is determined that a user of the first client device belongs to a first group out of multiple groups. A first pool of resources is selected based on the user of the first client device belonging to the first group, wherein the first pool of resources are available to members of the first group but not available to members of a second group out of the multiple groups. A first virtual machine is provisioned using the selected first pool of resources that includes the first virtual test environment, the first virtual test environment including features associated with the one or more configuration options associated with the first virtual test environment.

Abstract: Various embodiments concern an electrode of an implantable medical device for delivering electrical stimulation to tissue. Such an electrode can include a main body formed from a substrate metal comprising one of titanium, stainless steel, a cobalt-chromium alloy, or palladium. The main body may not be radiopaque. The electrode may further include a first coating on at least one side of the main body, the first coating comprising a layer of one of tantalum or iridium metal that is at least about 2 micrometers thick. The first coating can be radiopaque and porous. The porosity of the first coating can increase the electrical performance of the electrode in delivering electrical stimulation to tissue.