...) 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... (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...

... 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...

...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...

... 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...

... 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...

...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...

...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...

... 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...

... © 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...

...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...