During the electrophysiologic study of 435 patients referred for evaluation of Wolff-Parkinson-White syndrome, 42 (10%) had preexcited reciprocating tachycardia (defined as a macro-reentrant tachycardia that used an accessory atrioventricular [AV] pathway for antegrade conduction). The ages of the patients ranged from 9 to 67 years (27 +/- 14). Thirty-three were male patients, nine female, and ...

Analysis of reciprocating equipment piston rod leads to nonlinear elastic-plastic deformation analysis of rod with initial imperfection under axial dynamic load. In this paper a new and effective model and analytical formulations are presented to evaluate dynamic deformation and elastic-plastic stresses of reciprocating machine piston rod. This new method has capability to account for geometric...

The interactions between multiple pulsatile sources and the acoustic eigenmodes are analysed to elucidate influence of source characteristics contrasting phase differences on response in a liquid-filled complex piping network with branches. For illustration, two reciprocating pumps operating two-branched using one-dimensional linear model. lead enhanced or suppressed responses depending spatial...

OBJECTIVE To evaluate the outcomes of arthrocentesis with the new highly controllable, one handed reciprocating procedure syringe compared with a conventional syringe. METHODS 100 arthrocentesis procedures were randomised between the reciprocating syringe and the conventional syringe. Outcome measures included patient pain, procedure duration, operator satisfaction, synovial fluid volume, cel...

The major problems encountered in a reciprocating compressor are because of the valve failure .The other problem of leakage past the piston because of the worn out piston rings has also been placed in the reciprocating compressor. Pressure pulsations generated inside the piping of a reciprocating compressor may be taken as one of the tool for diagnosing the nature of fault inside the compressor...

The reciprocating pump plays an important role in the petrochemical industry procedure, it is crucial ensuring systematic safety and stability. Since useful feature information of vibration signal from tends to be overwhelmed by background ingredients, tough realize recognition on typical modes. Aiming at extraction mechanical fault features mode recognition, this paper proposes Improved Comple...