| NRI | nerve root involvement; nerve root irritation; nonrespiratory infection |
|---|---|
| PN | papillary necrosis; parenteral nutrition; penicillin; perceived noise; percussion note; periarteriti... |
| BBB | 1) Bundle Branch Block 2) Blood Brain Barrier - Blood Brain Barrier |
| BBBB | Bilateral Bundle Branch Block |
| LBBB | Left Bundle Branch Block |
| laryngeal sinus | The recess in each lateral wall of the larynx between the vestibular and vocal folds and into which the layrngeal sacculus opens. Synonym: ventriculus laryngis, laryngeal sinus, Morgagni's sinus, Morgagni's ventricle, sinus laryngeus. (05 Mar 2000) |
|---|---|
| laryngeal stenosis | Narrowing or stricture of any or all areas of the larynx; may be congenital or acquired. (05 Mar 2000) |
| laryngeal stridor | Crowing inspiration occurring at birth or within the first few months of life; sometimes without apparent cause and sometimes due to abnormal flaccidity of epiglottis or arytenoids. Synonym: laryngeal stridor. (05 Mar 2000) |
| laryngeal syncope | A paroxysmal neurosis characterised by attacks of coughing, with unusual sensations, as of tickling, in the throat, followed by a brief period of unconsciousness. (05 Mar 2000) |
| laryngeal tonsils | laryngeal lymphatic follicles |
| laryngeal veins | See: inferior laryngeal vein, superior laryngeal vein. (05 Mar 2000) |
| laryngeal ventricle | The recess in each lateral wall of the larynx between the vestibular and vocal folds and into which the layrngeal sacculus opens. Synonym: ventriculus laryngis, laryngeal sinus, Morgagni's sinus, Morgagni's ventricle, sinus laryngeus. (05 Mar 2000) |
| laryngeal vertigo | Fainting as a result of a coughing spell, caused by persistent increased intrathoracic pressure diminishing venous return to the heart, thus lowering cardiac output; most often occurs in heavy-set male smokers who have chronic bronchitis. Synonym: Charcot's vertigo, laryngeal vertigo. (05 Mar 2000) |
| alveolocapillary block | The presence of material that impairs the diffusion of gases between the air in the alveolar spaces and the blood in alveolar capillaries; block can be caused by oedema, cellular infiltration, fibrosis, or tumour, and results in undersaturation of peripheral arterial blood with oxygen. (05 Mar 2000) |
| anterograde block | Conduction block of an impulse traveling anywhere in its ordinary direction, for example, from the sinoatrial node toward the ventricular myocardium. (05 Mar 2000) |
| arborization block | Intraventricular block supposedly due to widespread blockage in the Purkinje ramifications and manifested in the electrocardiogram by a pattern similar to bundle-branch block but with complexes of low amplitude. (05 Mar 2000) |
| atrioventricular block | <cardiology> A conduction disturbance that results in the inappropriate delay (or complete inability) of a electrical impulse, generated in the atria, to reach the ventricles (via the atrioventricular node). Clinical types are divided into first (nonserious), second and third degree (most serious). Some drugs may precipitate atrioventricular block (for example clonidine, methyldopa, verapamil). A permanent pacemaker may be required for a third degree (complete) heart block. (02 Jan 1998) |
| A-V block | <cardiology> A conduction disturbance that results in the inappropriate delay (or complete inability) of a electrical impulse, generated in the atria, to reach the ventricles (via the atrioventricular node). Clinical types are divided into first (nonserious), second and third degree (most serious). Some drugs may precipitate atrioventricular block (for example clonidine, methyldopa, verapamil). A permanent pacemaker may be required for a third degree (complete) heart block. (02 Jan 1998) |
| block | An obstruction or stoppage. (18 Nov 1997) |
| block anaesthesia | Regional anaesthesia in which local anaesthetic solution is injected about nerves to inhibit nerve transmission; includes spinal, epidural, nerve block, and field block anaesthesia, but not local or topical anaesthesia. Synonym: block anaesthesia. (05 Mar 2000) |