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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
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...
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...
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
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...
J Exp Biol (2014) 217 (9): 1525–1534.
Published: 01 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...
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
J Exp Biol (2004) 207 (11): 1969–1976.
Published: 01 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...
J Exp Biol (2002) 205 (13): 1843–1851.
Published: 01 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...