(a.) Seated or generated within the heart; as, endocardial murmurs.
Example Sentences:
(1) A case of tricuspid valve endocarditis with spinal epidural abscess caused by Actinobacillus actinomycetemcomitans is reported in a 74-year-old male with an endocardial pacemaker.
(2) As a reflection of reduced demands for perfusion, impairment of midmyocardial and endocardial blood flow occurred in the stenosis group (p < 0.05).
(3) Intraoperative programmed stimulation failed to induce VT in eight patients and visually-directed endocardial resection was performed.
(4) 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.
(5) Thus, the endocardial-epicardial gradient of activation rates during VF is caused by ischemia.
(6) We conclude that: (1) two of the previously proposed criteria for diagnosis of entrainment (fixed fusion on the surface electrocardiogram and a first postpacing interval equal to the paced cycle length) are overly restrictive criteria for definition of "entrainment" of VT, (2) analysis of endocardial recordings from the site of origin of tachycardia during attempted entrainment of VT is useful for documenting the presence of entrainment, and (3) such analysis provides a basis for the understanding of surface electrocardiographic phenomenon associated with entrainment.
(7) In a noncontracting in vitro preparation of combined right and left atria we demonstrated by electron microscopy that, at 37 degrees C, transition from zero pressure to a physiological distending pressure of 5.1 mm Hg rapidly rendered atrial endocardial endothelium permeable to the macromolecular probes horseradish peroxidase (HRP; M(r), approximately 40,000) and wheat germ agglutinin-HRP (M(r), approximately 70,000); each probe was introduced at the atrial cavitary endocardial surface.
(8) Under normal circumstances, excitation of the heart spreads from the endocardial site to the epicardial site via the Purkinje fiber.
(9) PNA binding sites capped by sialic acid were most abundant in the developing rat heart during the critical period of endocardial cushion formation and decreased as development proceeded.
(10) When coronary vasodilatory reserve is impaired by the presence of a severe proximal stenosis, 5-HT causes modest impairment of endocardial flow regulation.
(11) Two days before death, the patient experienced complete heart block, and an echocardiogram revealed pulmonic valve thickening and an endocardial mass along the left side of the septum.
(12) Endocardial fibroelastosis is characterized by a porcelain-like thickening of the endocardium, resulting in a marked increase in echodensity of the endocardium, as well as ventricular dilatation and aortic atresia.
(13) Encircling endocardial resection, with complete removal of endocardial scar unguided by intraoperative mapping, was employed in 10 patients with drug-resistant sustained ventricular tachycardia.
(14) The effects of acute preload, afterload and contractility changes on both ejection and isovolumic phase measures of left ventricular function were analyzed in normal, trained conscious dogs instrumented with micromanometers and endocardial ultrasonic diameter gauges.
(15) Endocardial cells release factors which regulate myocardial contractility and guanosine 3':5'-cyclic monophosphate (cyclic GMP) levels.
(16) These results suggest that the paced depolarization integral obtained with the braided endocardial defibrillation lead could improve the specificity and sensitivity of ventricular fibrillation detection.
(17) The entities in question are angiolymphoid hyperplasia with eosinophilia and related cutaneous and subcutaneous disorders, atypical vascular proliferation of large vessels, hemangioendothelioma of bone, and endocardial benign angioreticuloma of the heart.
(18) This report describes a patient with a chronic endocardial left ventricular pacing lead.
(19) In the infarcted area the ratio: blood flow of endocardial layers to blood flow of epicardial layers, is improved by molsidomine.
(20) It is concluded that, because the range of standard deviation of normal endocardial motion and the degree of variability between radial segments in the same healthy individual are significant, qualitatively determined "hypokinesis," as commonly assessed clinically, may be a normal event.
Endocardium
Definition:
(n.) The membrane lining the cavities of the heart.
Example Sentences:
(1) MAPs were obtained from the right and left ventricular endocardium in six patients with congenital long QT syndrome (LQT group, 18 recording sites) and in eight control patients (control group, 19 recording sites).
(2) Endocardial fibroelastosis is characterized by a porcelain-like thickening of the endocardium, resulting in a marked increase in echodensity of the endocardium, as well as ventricular dilatation and aortic atresia.
(3) It is inferred, therefore, that the right perimyocardium and left ventricular wall are more susceptible to CB3 infection than right ventricular wall or left peri- and endocardium.
(4) During heart development in the chick some of the endocardial cells that cover the cushion areas leave the cushion endocardium, seed the underlying cardiac jelly, and are transformed into mesenchyme.
(5) Thus, the following criteria for the diagnosis of a VSD by color-Doppler-echocardiography were derived depending on the interventricular pressure gradient: 1) Interventricular pressure gradient greater than 15 mm Hg: visualization of the VSD-jet including its origin at the septal endocardium.
(6) These myxomas were generally attached to endocardium in the area of the oval foramen.
(7) Clear cells ("Hurler" cells) were identified within the myocardium and endocardium of both infants.
(8) Metabolic perturbations in the endocardium produced by cardiotoxic doses of isoprenaline were prevented or reduced by propranolol pretreatment.
(9) Macroscopic lesions were not seen with the exception of a small calcified plaque in the endocardium of one animal.
(10) The right ventricle was hypoplastic and its endocardium was diffusely thickened.
(11) The greater vulnerability of the endocardium to low-flow injury in shock was confirmed by the presence of hypercontraction lesions and necrosis in the papillary muscle and endocardial regions, but not in the epicardial region.
(12) In addition LV-EF, end-diastolic (EDV) and end-systolic volumes (ESV) were calculated by manual definition of endocardium in the original (Na) and contrast-echocardiograms (Ko).
(13) Fibrinolytic activity was reduced by 54% in the endocardium of the ischaemic reperfused myocardium and the 125I fibrinogen activity was elevated by 480%.
(14) This study was designed to determine whether measurement of integrated backscatter could be used detect the progressive transmural shift of myofiber alignment that occurs from epicardium to endocardium in human ventricular wall segments.
(15) We conclude that percutaneous fiberscopic imaging with a guiding balloon catheter is feasible and safe, and yields highly detailed images of the endocardium.
(16) Next the model was used to study propagated excitation in a three-dimensional region representing the anisotropic properties of the ventricular wall, with attention to the effects produced by variable fiber direction from "endocardium" to "epicardium."
(17) The authors report a case of primary malignant meningioma of meninges in the right frontal area with metastases to meninges in the right temporal area and left atrial endocardium and with emboli composed of malignant cells in the vessels of the myocardium, spleen, liver, lungs and pancreas in a 49-year-old woman after commissurotomy performed for rheumatic valvular heart disease.
(18) Exposure of the preparation to simulated "ischemia" (hypoxia, acidosis, glucose deprivation and hyperkalemia) resulted in several electrophysiological derangements, including a marked depolarization of the maximum diastolic potential (MDP) in both endocardium and epicardium, shortening of the action potential duration (APD), and prolongation of the transmural conduction time followed by transmural conduction block.
(19) The transmural distribution pattern of the microspheres (endocardium-epicardium ratios) reveals that rigor mortis is a factor that should be taken into account.
(20) In order to reduce the hazards of the septal puncture, an electrocardiographic mapping of the right atrial endocardium was performed using the Brockenbrough needle as an exploratory electrode in a group of 20 patients.