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OBJECTIVE To compare the effects of dual chamber pacing (DDD) and ventricular rate adaptive pacing (activity sensing) (VVIR) in patients with complete heart block. DESIGN Double blind crossover comparison with one month in each pacing mode. PATIENTS 10 consecutive patients aged 23-74 presenting with complete anterograde atrioventricular block at rest(More)
Heavy charged particle beams can be widely used for cancer therapy if control in heterogeneous tissue is proved practical. A beam of protons at 200 million electron volts has been visualized in plastic and in a living animal by using an on-line positron camera. The fraction of the activity retained in the radiation site was found to be at least 70 percent(More)
This article describes the use of rapid response teams to reduce the use of mechanical restraints (i.e., restricting a person's movement through the use of a mechanical device such as a backboard, net, or papoose) in an acute psychiatric care setting. Rapid response teams have proven highly effective for emergent medical patients, but have not typically(More)
Accurate bolus is needed for extension of Bragg-peak therapy. Proton beam-stopping profiles in a lucite-styrofoam-tissue phantom and in a Rando phantom were recorded photographically. Air volumes caused the largest distortions. Lucite bolus was cut to achieve desired beam-stopping profiles. Verification of bolus effect in situ will be important to control(More)