ELDRIDGE, FREDERIC L. Relationshz) between phrenic nerve activity and ventdation. Am. J. Physiol. 221(Z) : 535-543. 197 1 .-Phrenic nerve discharges were recorded in anesthetized cats simultaneously with a range of tidal volumes. Nerve impulses were processed in a variety of ways. Total impulses per breath and peak impulse frequency correlated poorly with tidal volume. Integrated electrical act...

INTRODUCTION. Dysfunction of diaphragm postoperatively is associated with worsened quality life and increased health care costs due to prolonged respiratory support morbidity. After cardiac operations, dysfunction can take place in up 10 % patients but often remains underdiagnosed. At the same time, histologically revealed changes, such as muscle atrophy diaphragm, start within 12 hours mechani...

Congenital central hypoventilation syndrome (CCHS) is a rare, idiopathic disorder characterized by a failure of automatic respiration. Abnormalities such as seizure disorder, failure to thrive, and Hirschsprung disease have been associated with CCHS. In this report, the authors discuss the use of vagal nerve stimulation (VNS) to treat a medically refractory seizure disorder in a child who had p...

Recovery after surgical reconstruction of a brachial plexus injury using nerve grafting and nerve transfer procedures is a function of peripheral nerve regeneration and cerebral reorganization. A 15-year-old boy, with traumatic avulsion of nerve roots C5-C7 and a non-rupture of C8-T1, was operated 3 weeks after the injury with nerve transfers: (a) terminal part of the accessory nerve to the sup...

Phrenic nerve stimulation is a technique whereby a nerve stimulator provides electrical stimulation of the phrenic nerve to cause diaphragmatic contraction. The most common indications for this procedure are central alveolar hypoventilation and high quadriplegia. This paper reviews the available data on the 19 patients treated with phrenic nerve stimulation in Australia to date. Of the 19 patie...

Percutaneous epicardial ventricular ablation in patients with previous cardiac surgery carries higher risk of complications. There are limited data regarding surgical cryothermal these patients. To determine outcomes cryoablation for arrhythmias at a single institution. Baseline characteristics and prior who underwent tachycardia (VT) from 2017 -2022 were retrospectively reviewed. A total 13 in...

BACKGROUND Electrical stimulation of the phrenic nerve is a useful non-volitional method of assessing diaphragm contractility. During the assessment of hemidiaphragm contractility with electrical stimulation, low twitch transdiaphragmatic pressures may result from difficulty in locating and stimulating the phrenic nerve. Cervical magnetic stimulation overcomes some of these problems, but this t...

The number of patients with implantable electronic devices (IEDs) is growing as indications for a myriad of cardiac and neurological disorders that cannot be managed using medication alone expand. These devices include gastric and cardiac pacemakers, implantable cardioverter defibrillators, cochlear implants, and a range of stimulators of the deep brain, vagal nerve, sacral nerve, phrenic nerve...

Supramaximal stimuli, with time intervals of 100 ms (10 Hz) to 10 ms (100 Hz), were delivered in pairs to the phrenic nerves, bilaterally, in five seated normal subjects, while transdiaphragmatic pressure swings (Pdi,s) were recorded at relaxed end-expiratory lung volume with airways closed. In fresh diaphragms, Pdi,s increased between 10-20 Hz and reached a plateau between 20-30 Hz. Diaphragma...