Block

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Block

A segment of a town or city surrounded by streets and avenues on at least three sides and usually occupied by buildings, though it may be composed solely of vacant lots. The section of a city enclosed by streets that is described by a map which indicates how a portion of land will be subdivided.

References in periodicals archive ?
(3) When combined effects of Ach and the changes in the intrinsic properties of the SAN with the mutation were considered, conduction block can occur in both directions toward the atrium and CT, leading to a higher probability of SAN exit block and sinus arrest than with the mutation or Ach alone.
(167) The electrodiagnosis of these patients supports AMAN and acute motor conduction block neuropathy, and IgG anti-GD1a antibodies are also present in some patients with pharyngeal-cervical-brachial weakness.
Fainting, near fainting or dizzy spells are the usual symptoms of conduction block, and these should never be ignored!
Demyelinated fibers are sensitive to small changes in temperature and electrolytes, which can quickly produce conduction block.[30] In normally myelinated fibers, the opposite is true; small increases in temperature actually increase conduction velocity.
Her EKG showed sinus bradycardia with no PR prolongation or conduction block. A 48 hr Holter monitor showed slow heart rate (HR) during sleep (30-40 beats/min) with an early morning pause of 3.5 seconds and an average HR of 61 beats/min.
Electrocardiographic abnormalities have been noted in 38-91% of cases and include bundle branch block (right, left) in 25%, atrioventricular block in 8%, atrial fibrillation in 2-6%, extrasystole (atrial and ventricular) in 18% and ventricular fibrillation in 2%.4 In the above series, case 3 died of ventricular fibrillation and case 5 had extensive conduction block.
Our study showed that heart conduction block was very common among Chinese KSS patients, which was consistent with other reports.[sup][18] There were different types of conduction blocks including RBBB, LAFB, and different degrees of AVBs.
Their topics include analog front-end and telemetry systems, energy management integrated circuits for wireless power transmission, the reliability and security of implantable and wearable medical devices, electrodes for the electrical conduction block of the peripheral nerve, and implantable imaging systems for the automated monitoring of internal organs.
18 patients developed shock (14 patients (14.5%) with RVI and 4 (4.1%) patients were without RVI), 26 patients developed conduction block (18 patients (18.7%) in those with RVI and 8 patients (7.8%) in those without RVI), 17 patients developed VF (10 patients 10.5% were with RVI 7 patients 7.0% without RVI).
For amplitude change, a decrease over 20% was interpreted in favor of focal conduction block, as recommended by the American Association of Neuromuscular and Electrodiagnostic Medicine (13).
The detailed effects of the lidocaine nerve conduction block used in clinical practice for preoperative assessment of patients with excessive spasticity of a limb segment remain poorly elucidated.