Dallas, TX - Antiarrhythmic agents used with today's implantable cardioverter defibrillators (ICDs), particularly amiodarone, don't raise successful-shock energy requirements enough to make ...

Objectives: To determine the effect of physiologic catecholamine concentrations on the defibrillation threshold (DFT) in patients with implanted cardioverter defibrillators. Background: DFT is the ...

Defibrillation testing during implantation of cardioverter–defibrillators is controversial because of potential safety concerns and a lack of evidence for the effectiveness of the procedure. New data ...

A small-diameter, defibrillation lead that can be delivered through existing commercially available catheters for targeted placement is durable and safe, with no incidence of fractures at 1 year, the ...

One of the best measures of running fitness is lactate threshold (LT), which is the running speed or heart rate at which lactate — an intermediate product of aerobic metabolism in the muscles — begins ...

Runners throw around the term “tempo run” like confetti. It’s confusing, even for well seasoned athletes, because it’s not a cut-and-dried definition like a lactate threshold workout. Frequently, ...