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1-16 of 16
Keywords: electrocardiogram
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Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2024) 227 (20): jeb247928.
Published: 25 October 2024
...) incremental Q 10 analysis. Labeled arrows indicate the mean thermal limits and peak f H,max . As an overview, fish are placed under anaesthesia with assisted gill ventilation, fitted with electrocardiogram (ECG) electrodes and injected with drugs to block cardiac cholinergic tone (see Glossary...
Includes: Supplementary data
Journal Articles
Heart rate reduction during voluntary deep diving in free-ranging loggerhead sea turtles
Open Access
Journal:
Journal of Experimental Biology
J Exp Biol (2024) 227 (5): jeb246334.
Published: 5 March 2024
... with recorders into the sea and recorded their electrocardiogram, depth, water temperature and longitudinal acceleration. After 3 days, the recorders automatically detached from the turtles. The heart rate signals were detected from the electrodes placed on the surface of the plastron. The mean (±s.d.) heart...
Journal Articles
The distress context of social calls evokes a fear response in the bat Pipistrellus abramus
Open AccessKazuki Yoshino-Hashizawa, Yuna Nishiuchi, Midori Hiragochi, Motoki Kihara, Kohta I. Kobayasi, Shizuko Hiryu
Journal:
Journal of Experimental Biology
J Exp Biol (2023) 226 (23): jeb246271.
Published: 28 November 2023
... unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Summary: The electrocardiograms of captive Pipistrellus abramus show that their heart rate increases as a fear response when the bats hear sounds with a distress context...
Includes: Supplementary data
Journal Articles
A non-invasive, concealed electrocardiogram and bioimpedance measurement system for captive primates
FreeErnesto Serrano-Finetti, Gemma Hornero, Sergio Mainar, Francisco López, Dietmar Crailsheim, Olga Feliu, Oscar Casas
Journal:
Journal of Experimental Biology
J Exp Biol (2023) 226 (17): jeb245783.
Published: 11 September 2023
... fatal heart conditions that require the monitoring of physiological signals such as electrocardiogram (ECG) or respiratory rate. ECG screening must be conducted after applying full anaesthesia, causing potential physical and emotional stress as well as risk for the animal. Here, we present an electronic...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2022) 225 (15): jeb244307.
Published: 10 August 2022
... with high-voltage shocks but is immune to its own, as well as external, high-voltage shocks. Neither a detailed analysis of the electrocardiogram nor the structure of the heart indicated a specialized cardiac conduction system. Using a suitable perfusion system, we discovered that, despite its immunity...
Includes: Supplementary data
Journal Articles
An accelerometer-derived ballistocardiogram method for detecting heart rate in free-ranging marine mammals
Open Access
Journal:
Journal of Experimental Biology
J Exp Biol (2022) 225 (10): jeb243872.
Published: 20 May 2022
... with traditional bio-loggers, such as accelerometers, still contain untapped eco-physiological information. Here, we present a computational method for extracting heart rate from high-resolution accelerometer data using a ballistocardiogram. We validated our method with simultaneous accelerometer–electrocardiogram...
Includes: Supplementary data
Journal Articles
Jonathan A. W. Stecyk, Christine S. Couturier, Denis V. Abramochkin, Diarmid Hall, Asia Arrant-Howell, Kerry L. Kubly, Shyanne Lockmann, Kyle Logue, Lenett Trueblood, Connor Swalling, Jessica Pinard, Angela Vogt
Journal:
Journal of Experimental Biology
J Exp Biol (2020) 223 (22): jeb225730.
Published: 16 November 2020
... (5H fish), on in vivo and spontaneous heart rate (f H), electrocardiogram, ventricular action potential (AP) shape and duration (APD), the background inward rectifier (I K1) and rapid delayed rectifier (I Kr) K + currents and ventricular gene expression of proteins involved in excitation–contraction...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2020) 223 (12): jeb225227.
Published: 25 June 2020
... exposed to acute warming while electrocardiograms were recorded. From 12°C to 25.3°C, electrical excitation between different parts of the heart was coordinated, but above 25.3°C, atrial and ventricular beating rates became partly dissociated because of 2:1 atrioventricular (AV) block. With further...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2018) 221 (4): jeb174508.
Published: 22 February 2018
...Amanda D. V. MacCannell; Ethan C. Jackson; Katherine E. Mathers; James F. Staples ABSTRACT We used electrocardiogram (ECG) telemeters to measure the heart rate of hibernating Ictidomys tridecemlineatus (thirteen-lined ground squirrel). An increase in heart rate from 2.2 to 5 beats min –1 accurately...
Includes: Supplementary data
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2016) 219 (10): 1495–1504.
Published: 15 May 2016
... temperature changes, thermal sensitivity of cardiac excitation in a eurythermal teleost, the roach (Rutilus rutilus), was examined. Excitability of the heart was determined from in vivo electrocardiograms and in vitro microelectrode recordings of action potentials (APs) from winter and summer roach...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2014) 217 (9): 1525–1534.
Published: 1 May 2014
... seals) regulate heart rate (f H) while diving. We investigated dive f H in five adult female California sea lions (Zalophus californianus) during foraging trips by instrumenting them with digital electrocardiogram (ECG) loggers and time depth recorders. In all dives, dive f H (number of beats/duration...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2014) 217 (2): 299–309.
Published: 15 January 2014
...Matti Vornanen; Jaakko Haverinen; Stuart Egginton The upper thermal tolerance and mechanisms of heat-induced cardiac failure in the brown trout (Salmo trutta fario) was examined. The point above which ion channel function and sinoatrial contractility in vitro , and electrocardiogram (ECG) in vivo...
Includes: Supplementary data
Journal Articles
The use of power spectral analysis to determine cardiorespiratory control in the short-horned sculpin Myoxocephalus scorpius
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (11): 1969–1976.
Published: 1 May 2004
...H. A. Campbell; E. W. Taylor; S. Egginton SUMMARY Anaesthesia and minor surgery to place electrocardiogram recording electrodes in the short-horned sculpin caused a decrease in mean normal beat(R–R) interval and heart rate variability (HRV), measured as the standard deviation in the R–R interval...
Journal Articles
Delayed depolarization of the cog-wheel valve and pulmonary-to-systemic shunting in alligators
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2002) 205 (13): 1843–1851.
Published: 1 July 2002
... from the apex towards the base (near where the cog-wheel valve muscle is located) at a velocity of 91±23 cm s -1 (mean ± S.E.M., N =3). The cog-wheel valve electrocardiogram (ECG) (and thus contraction of the valve) trailed the right ventricular ECG by 248±28 ms (N =3), which was equivalent to 6-35...
Journal Articles
Rates of Rewarming, Heart and Respiratory Rates and Their Significance for Oxygen Transport During Arousal From Torpor in the Smallest Mammal, the Etruscan Shrew Suncus Etruscus
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (1997) 200 (10): 1451–1458.
Published: 15 May 1997
... © 1997 The Company of Biologists Ltd. 1997 Suncus etruscus Etruscan shrew torpor arousal rate of rewarming heart rate respiratory rate oxygen transport brown adipose tissue thermogenesis electrocardiogram The Etruscan shrew Suncus etruscus is the smallest mammal...
Journal Articles
Heart and Respiratory Rates and Their Significance for Convective Oxygen Transport Rates in the Smallest Mammal, the Etruscan Shrew Suncus Etruscus
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (1996) 199 (12): 2579–2584.
Published: 1 December 1996
...Klaus D. Jürgens; Roger Fons; Thomas Peters; Susanne Sender ABSTRACT Heart and respiratory rates of the smallest mammal (mean adult body mass 2 g), the Etruscan shrew Suncus etruscus , were determined at rest and under stress conditions. Heart rate was obtained from electrocardiograms (ECGs...