(n.) A small fiber; the branch of a fiber; a very slender thread; a fibrilla.
Example Sentences:
(1) Electrophysiologic studies are indicated in patients with sustained paroxysmal ventricular tachycardia, ventricular fibrillation or aborted sudden death.
(2) During electrophysiologic study, the effect of propafenone on the effective refractory period of the accessory pathway was determined, as well as its effect during orthodromic atrioventricular (AV) reentrant tachycardia and atrial fibrillation.
(3) The patients were classified into two groups according to the presence (n = 166) or absence (n = 176) of documented episodes of atrial fibrillation preoperatively.
(4) The majority of the hearts went spontaneously into ventricular fibrillation at some stage of the operation.
(5) The interobserver variability of these indices is low (r greater than 0.96); reproducibility is good in patients with sinus rhythm but mediocre in atrial fibrillation.
(6) This study demonstrates that 1) complete AV block is not a contraindication to the Fontan operation, 2) some patients may not require AV synchrony postoperatively for survival, and 3) postoperative atrial flutter or fibrillation may cease or be easier to control after the Fontan operation.
(7) Prolonged beta-adrenergic stimulation obtained by subcutaneous injection of isoproterenol in unanesthetized, unrestrained rats elicited ventricular fibrillation in approximately 80% of animals at 10-12 months of age.
(8) In almost 80% of sudden cardiac deaths in ACMP foci of acute myocardial ischemia are found, that can lead to ventricular fibrillation with lethal outcome.
(9) Electrophysiological and muscle histochemical studies of denervated muscle were performed simultaneously in order to determine the relationship between fibrillation potentials and muscle fiber type.
(10) The results demonstrate that the addition of pulsatile flow to coronary perfusion minimized the deleterious effects of prolonged ventricular fibrillation on myocardial performance.
(11) Ventricular defibrillation was acheived in active conscious dogs with a chronically implanted automatic system composed of a defibrillator and an alternating current fibrillator.
(12) Thus, magnesium may be useful in the management of ventricular fibrillation during ischemia.
(13) Furthermore, patients with alcohol-related atrial fibrillation were significantly more likely to manifest alcohol withdrawal syndrome than were other inpatients with heavy alcohol use.
(14) Complications included perioperative death (3 patients), post-operative ventricular tachycardia (12 patients) and atrial fibrillation (8 patients), perioperative myocardial infarction (1 patient) and device discharges for sinus tachycardia and supraventricular arrhythmias (17 patients).
(15) White lines 2 and 5 tended to merge with lines 1 and 4, respectively, in collagen fibrils formed from a solution containing a significant amount of type I collagen or pure type I collagen.
(16) The failure of both drugs to protect against ischemic ventricular fibrillation in a model in which beta adrenoceptor antagonism has previously proved beneficial may be due in part to related cardiostimulant properties shared by celiprolol and pindolol.
(17) Ventricular fibrillation was then induced and, after predetermined downtimes ranging from 5 to 60 minutes, thoracotomy was performed, and open-chest bimanual cardiac massage was started.
(18) At implant, bipolar endocardial electrograms were recorded before each shock application, during ventricular fibrillation, during redetection of ventricular fibrillation in case the applied shock was ineffective, and at intervals of 5, 10, 20, 30, 60, and 120 seconds after each shock delivery.
(19) Atrial fibrillation thresholds were determined at baseline (0.0% inhalational anesthetic), 0.5 minimal alveolar concentration (MAC), and 1.0 MAC of halothane (n = 8) and isoflurane (n = 8).
(20) All patients with emboli were in atrial fibrillation.
Fibrillar
Definition:
(a.) Of or pertaining to fibrils or fibers; as, fibrillar twitchings.
Example Sentences:
(1) Differences in the mean volume values of nucleoli, fibrillar centers and the RNP-part between some cell populations are sufficiently well pronounced.
(2) Electron microscopy revealed an absolute correlation between expression of four plasmid-dependent, temperature-inducible properties related to the bacterial surface: (i) a fibrillar matrix covering the outer membrane, (ii) outer membrane protein YOP1, (iii) spontaneous autoagglutination, and (iv) mannose-resistant hemagglutination of guinea pig erythrocytes.
(3) The ultrastructural study of nucleoli and ribonucleoprotein-containing structures in human seminiferous tubules revealed that the nucleoli of spermatogonia, spermatocytes and Sertoli cells exhibited a tripartite structure consisting of: a fibrillar center, a compact granular portion, and a reticular portion containing both pars fibrosa and pars granulosa.
(4) This technique contrasted the fibrillar component and the granular component in interphase nucleoli as a reflection of the degree of packing.
(5) From these findings it can be concluded that the transcription of ribosomal DNA takes place in the dense fibrillar component of the nucleolus.
(6) Immunoelectron microscopy revealed that in spermatogonia, leptotene and pachtyene spermatocytes, and in Golgi phase spermatids, B23 and nucleolin were localized in the dense fibrillar component and granular component of the nucleolus but not in the fibrillar centers.
(7) Precoating with fibrillar collagen markedly increased endothelial cell attachment and proliferation as compared to fibronectin.
(8) These vacuoles contained one or several typical collagen fibrils and had either an electron-lucent matrix or contained an electron-dense material obscuring the fibrillar outlines and cross-striations.
(9) There was also electron microscopical evidence of vascular basal lamina reduplication and the deposition of a fine fibrillar material in and around these vessels.
(10) Toyocamycin treatment caused the gradual disappearance of the granules from the particulate region of the nucleoli, and resulted ultimately in the nucleoli appearing homogeneously fibrillar.
(11) The protein specifically bound to fibrillar collagen with the apparent dissociation constant of 5.6 x 10(-8) M for the high affinity site and 5.5 x 10(-7) M for the low affinity site.
(12) The interaction of human gel-filtered platelets (GFP) with surfaces coated with fibrillar calf skin collagen (CSC) or monomeric human type I, III, IV, and V collagen (CI, CIII, CIV, CV) includes both energy dependent and independent stages.
(13) Some tumor cells have been demonstrated by this method to be glial despite the complete lack of blue fibrillar staining with PTAH and the absence of all morphological similarity to glial cells.
(14) An increase tendency of the fibrillar apparatus beginning from the childhood to the adulthood and then a differentiated decrease or stabilization towards the old age with the appearance of senile keratosis lesions were noticed.
(15) Collagenous carcass of human derma is formed by interconnected fibrils, fibrillar fasciculi, fibers and their fasciculi.
(16) The LSSC had large euchromatic nuclei with multiple irregular nucleoli containing both fibrillar and granular components.
(17) To know their tissue-specific localization, fibrillar and tubular type muscle fibers were individually dissected from freeze-dried flies and separately subjected to 2D gel electrophoresis.
(18) In the detergent-resistant, adherent cytoskeletons of the glioma cells, both GFAP and vimentin persisted as fibrillar cytoplasmic arrays.
(19) In addition, it was found that the lumens of some vessels were filled with fibrillar material and that the cells underlying the vessel stayed apart, not forming a continuous circle.
(20) Volume fractions of fat and fibrillar and extrafibrillar space were equal in the two groups.