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Keywords: blood pressure
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Journal Articles
Journal Articles
J Exp Biol (2021) 224 (17): jeb242202.
Published: 13 September 2021
... positive chronotropic effects. To investigate whether this tonic elevation of heart rate impairs the ability for autonomic regulation of heart during digestion, we characterised heart rate responses to pharmacological manipulation of blood pressure in the snake Boa constrictor through serial injections...
Journal Articles
Journal Articles
J Exp Biol (2020) 223 (2): jeb218164.
Published: 27 January 2020
... differences between splenectomized (unable to release erythrocytes from the spleen) and sham-operated individuals, we demonstrate the metabolic benefits (i.e. aerobic scope increase of 103%) and the cardiovascular trade-offs (i.e. ventral aortic blood pressure and cardiac workload increase of 12% and 30...
Includes: Supplementary data
Journal Articles
Journal Articles
Journal Articles
J Exp Biol (2014) 217 (13): 2232–2234.
Published: 1 July 2014
...Sanne Enok; Christopher Slay; Augusto S. Abe; James W. Hicks; Tobias Wang Interspecific allometric analyses indicate that mean arterial blood pressure (MAP) increases with body mass of snakes and mammals. In snakes, MAP increases in proportion to the increased distance between the heart...
Journal Articles
Journal Articles
J Exp Biol (2008) 211 (22): 3588–3593.
Published: 15 November 2008
... by coronary arteries. The functional importance of these coronary arteries remains unknown. In the present study we investigate the effects of permanent coronary artery occlusion in the South American rattlesnake ( Crotalus durissus ) on the ability to maintain heart rate and blood pressure at rest and during...
Journal Articles
Journal Articles
J Exp Biol (2005) 208 (6): 1095–1107.
Published: 15 March 2005
..., are linked to the initiation of cardiorespiratory responses to hypercarbia. * Author for correspondence (e-mail: Katie.Gilmour@science.uottawa.ca ) 3 1 2005 © The Company of Biologists Limited 2005 2005 tambaqui Colossoma macropomum hypercarbia blood pressure ventilation blood...
Journal Articles
Journal Articles
J Exp Biol (2004) 207 (9): 1471–1478.
Published: 1 April 2004
...Gina Galli; E. W. Taylor; Tobias Wang SUMMARY Seven freshwater turtles Trachemys scripta were instrumented with flow probes and cannulated for blood pressure measurements. The turtles were warmed from 24 to 34°C, and cooled down to 24°C, with and without atropine. Animals exhibited a hysteresis...
Journal Articles
Journal Articles
J Exp Biol (2003) 206 (23): 4241–4245.
Published: 1 December 2003
... are well separated by the muscular ridge, and a previous study using in situ perfusion of the heart revealed a remarkable flow separation and showed that the systemic side can sustain higher output pressures than the pulmonary side. Here we extend these observations by showing that systemic blood pressure...
Journal Articles
Journal Articles
J Exp Biol (2002) 205 (13): 1843–1851.
Published: 1 July 2002
... and systemic blood pressures in an alligator. (A) Pressure in the right ventricle(RV, red) and pulmonary artery (PA, green) and electrocardiograms (ECGs) from the centre of the right ventricle (RV ECG, red) and the cog-wheel valve muscle(cog-wheel ECG, blue) when the cog-wheel valve was functioning. (B...
Journal Articles
J Exp Biol (2001) 204 (20): 3553–3560.
Published: 15 October 2001
... equipped with an arterial catheter for measurements of blood pressure and heart rate, and autonomic tonus was determined following infusion of the β-adrenergic antagonist propranolol (3 mg kg –1 ) and the muscarinic cholinoceptor antagonist atropine (3 mg kg –1 ). The mean heart rate of fasting animals...
Journal Articles
J Exp Biol (2000) 203 (13): 2047–2052.
Published: 1 July 2000
... in arterial pressure and stroke volume. There were no changes in heart rate, indicating the absence of an arterial baroreflex. Blood pressure in saline-injected animals recovered quickly (within 5 min), whereas hetastarch injections caused hypertension to be maintained for much longer, for over 40 min...
Journal Articles