Comparison Between Velocity, Displacement, and Strain Imaging in Acute Grading of Myocardial Dysfunction by Tissue Doppler Echocardiography: A

A device and associated system for threading, cutting, and reaming pipe ends are described. The device and system utilizes a brushless DC electric motor. The devices also include on-board electronics and operator interface(s) to provide sophisticated control and information as to the various operations. Also described are methods of operating the devices and several different modes for performing various operations.