EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Evaluation of a new de fibrillation pathway tongue epigastric tongue apex route 2. impedance characteristics in human subjects


, : Evaluation of a new de fibrillation pathway tongue epigastric tongue apex route 2. impedance characteristics in human subjects. Journal of the American College of Cardiology 4(2): 253-258

An automated device for defibrillation using a vertical shock pathway (tongue-epigastric or tongue-apex) was developed. The energy requirements for defibrillation using vertical pathways are uncertain and will be determined largely by the impedance of the pathway. To determine the impedance characteristics of vertical defibrillation pathways in humans subjects, 20 patients undergoing elective cardioversion of atrial fibrillation or atrial flutter, or both, were studied. Patients received shocks from electrodes placed in tongue-epigastric or tongue-cardiac apex positions. The tongue electrode was a 12 cm2 metal plate fixed to a standard plastic oropharyngeal airway. The epigastric or cardiac apex electrode was a 40 cm2 selfadhesive pad. The electrodes were connected to a standard damped-sinusoidal waveform defibrillator. The 2 vertical shock pathways evidently had substantially higher impedance than the standard transthoracic pathway: tongue-epigastric pathway 130 .+-. 11.OMEGA. (SD), tongue-apex pathway 115 .+-. 12.OMEGA. transthoracic pathway 68 .+-. 11.OMEGA. (P < 0.05). The higher impedance is probably due to the longer interelectrode distances of vertical pathways: tongue-epigastric 33 .+-. 3 cm, tongue-apex 28 .+-. 3 cm, transthoracic 23 .+-. 3 cm (P < 0.05). Vertical pathway shocks were successful in the cardioversion of 15 of 20 patients. Four of the five patients in whom vertical shocks were unsuccessful subsequently underwent successful cardioversion by transthoracic shocks; the transthoracic shocks achieved a higher current because of lower impedance of the transthoracic route. Vertical shock pathways in human subjects apparently have higher impedance than do transthoracic pathways. Because of this higher impedance, higher energy may be required for vertical pathway defibrillation than for standard transthoracic defibrillation.

(PDF 0-2 workdays service)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 005395358

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Heckenlively J., 1981: Retinitis pigmentosa unilateral coats disease and thalassemia minor a case. A patient with retinitis pigmentosa, a retinal vasculopathy typical of Coats's Disease, and elevated A2 and fetal hemoglobin consistent with thalassemia minor is presented. Further cases of Coats's disease and other retinal vasculopathie...

Sarigianni, M.; Liakos, A.; Vlachaki, E.; Paschos, P.; Athanasiadou, E.; Montori, V.M.; Murad, M.Hassan.; Tsapas, A., 2015: Accuracy of magnetic resonance imaging in diagnosis of liver iron overload: a systematic review and meta-analysis. Guidelines advocate use of magnetic resonance imaging (MRI) to estimate concentrations of iron in liver, to identify patients with iron overload, and to guide titration of chelation therapy. However, this recommendation was not based on a systemat...

Pellicone, C.; Nullans, G.; Cook, N.J.; Virmaux, N., 1985: Light-induced conformational changes in the extradiscal regions of bovine rhodopsin. Light-induced conformational changes occurring at the cytosolic surface of rhodopsin were investigated by performing limited digestions of native and illuminated visual pigment with thermolysin, Arg-C endoproteinase, papain and proteinase K. A hig...

Carney, V., 1999: A Cherokee/Appalachian perspective our "rag coat" culture. Kentucky Nurse 46(4): 9-10

Collu, R.; Leboeuf, G.; Letarte, J.; Ducharme, J.R., 1975: Stimulation of growth hormone secretion by levodopa-propranolol in children and adolescents. Levodopa, 0.5 g/1.73 m2, and propranolol, 0.75 mg/kg, were given by mouth to 23 children with short stature and 10 children with several disorders. Glucose and insulin tolerance tests and arginine infusions were given in some of these subjects to...

Zabalgoitia, M.; U.R.hman, S.N.; Haley, W.E.; Abochamh, D.A.; Oneschuk, L.; Amerena, J.; Yarows, S.; Krause, L.; Yunis, C.; Lucas, C., 1997: Role of left ventricular hypertrophy in diastolic dysfunction in aged hypertensive patients. Objective: To evaluate the influence of left ventricular hypertrophy (LVH) on the diastolic dysfunction in older hypertensive patients. Methods: In total 665 patients (58% men, 61% White, aged 55-80 years) with mild-to-moderate essential hypertens...

Russell, R.G.; Smith, R., 1973: Diphosphonates. Experimental and clinical aspects. Journal of Bone and Joint Surgery. British Volume 55(1): 66-86

Alvir, J.M.; Lieberman, J.A.; Borenstein, M.T., 1990: A single estimate of separate within-individual correlations: applications in psychopharmacology. Simple procedures are proposed to describe relationships between sets of repeated measures within study subjects. An example is the association between blood levels of prolactin and a drug (e.g., methylphenidate) measured at multiple time-points a...

Chen W.; Bahl O.P., 1991: Recombinant carbohydrate variant of human choriogonadotropin beta subunit hcg beta decarboxyl terminus 115 145 expression and characterization of carboxyl terminal deletion mutant of hcg beta in the baculovirus system. A recombinant analog of human choriogonadotropin .beta.-subunit descarboxyl-terminal peptide (115-145 residues, delhCG.beta.) was obtained by the expression of corresponding .beta.cDNA in the baculovirus expression system. The efficiency of expres...

Tamin, J., 1997: Ethics and the occupational physician. Occupational Medicine 47(2): 110-111