Electrocardiogram, Heart Movement And Heart Rate In The Awake Gecko (hemidactylus Mabouia).

dc.creatorGermer, Carina M
dc.creatorTomaz, Juliana M
dc.creatorCarvalho, Ana F
dc.creatorBassani, Rosana A
dc.creatorBassani, José W M
dc.date2015-Jan
dc.date2015-11-27T13:46:39Z
dc.date2015-11-27T13:46:39Z
dc.date.accessioned2018-03-29T01:24:08Z
dc.date.available2018-03-29T01:24:08Z
dc.identifierJournal Of Comparative Physiology. B, Biochemical, Systemic, And Environmental Physiology. v. 185, n. 1, p. 111-8, 2015-Jan.
dc.identifier1432-136X
dc.identifier10.1007/s00360-014-0873-5
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/25395252
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/202284
dc.identifier25395252
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1302517
dc.descriptionThe electrocardiogram (ECG) is the simplest and most effective non-invasive method to assess the electrical activity of the heart and to obtain information on the heart rate (HR) and rhythm. Because information on the HR of very small reptiles (body mass <10 g) is still scarce in the literature, in the present work we describe a procedure for recording the ECG in non-anesthetized geckos (Hemidactylus mabouia, Moreau de Jonnès, 1818) under different conditions, namely manual restraint (MR), spontaneous tonic immobility (TI), and in the non-restrained condition (NR). In the gecko ECG, the P, QRS and T waves were clearly distinguishable. The HR was 2.83 ± 0.02 Hz under MR, which was significantly greater (p < 0.001) than the HR under the TI (1.65 ± 0.09 Hz) and NR (1.60 ± 0.10 Hz) conditions. Spontaneously beating isolated gecko hearts contracted at 0.84 ± 0.03 Hz. The in vitro beating rate was affected in a concentration-dependent fashion by adrenoceptor stimulation with noradrenaline, as well as by the muscarinic cholinergic agonist carbachol, which produced significant positive and negative chronotropic effects, respectively (p < 0.001). To our knowledge, this is the first report on the ECG morphology and HR values in geckos, particularly under TI. The methodology and instrumentation developed here are useful for non-invasive in vivo physiological and pharmacological studies in small reptiles without the need of physical restraint or anesthesia.
dc.description185
dc.description111-8
dc.languageeng
dc.relationJournal Of Comparative Physiology. B, Biochemical, Systemic, And Environmental Physiology
dc.relationJ. Comp. Physiol. B, Biochem. Syst. Environ. Physiol.
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.titleElectrocardiogram, Heart Movement And Heart Rate In The Awake Gecko (hemidactylus Mabouia).
dc.typeArtículos de revistas


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