Acute or chronic demyelinating neuropathies may occur a few months after the institution of TNF-[alpha] treatment, very often associated with conduction blocks
on nerve conduction studies.
that recovers without development of increased temporal dispersion or other demyelinating features.
Performing epicardial ablation on a beating heart avoids cardiopulmonary bypass and aortic cross clamping associated with traditional procedures such as the cut and sew Maze, and allows for confirmation of conduction block
Demyelinated fibers are sensitive to small changes in temperature and electrolytes, which can quickly produce conduction block
Electromyography with needle conduction study is helpful in the diagnosis of AIDP, typically revealing slowing of nerve conduction with conduction block
or abnormal dispersion, prolonged distal latencies, and delayed F waves (12).
Neurapraxis (nerve "shock") results simply in a conduction block
along the neurite.
Transmurality of the lesions is required for conduction block
which, in turn, is essential for the prevention of abnormal conduction associated with AF, and for the potential to restore normal heart rhythm.
Atrial flutter with alternating 2:1 and 4:1 conduction block
It is done by inserting special flexible tubes (catheters) with electrodes at the tip into various locations within the heart from leg and neck veins and creating a three-dimensional map (shell) of the left upper chamber and then creating a series of lesions set with electrical energy (radio frequency ablation) to create a conduction block
to abnormal electrical impulses at various predetermined locations.
Radiofrequency energy was terminated immediately in the event of impedance rise, displacement of the catheter, an increase in PR interval, occurrence of AV conduction block
, accelerated JR with cycle length shorter than 450 ms or JR without ventriculoatrial conduction.