What determines systemic blood flow in vertebrates?
In the 1950s, Arthur C. Guyton removed the heart from its pedestal in cardiovascular
physiology by arguing that cardiac output is primarily regulated by the peripheral …
physiology by arguing that cardiac output is primarily regulated by the peripheral …
The electrocardiogram of vertebrates: Evolutionary changes from ectothermy to endothermy
BJD Boukens, DL Kristensen, R Filogonio… - Progress in biophysics …, 2019 - Elsevier
The electrocardiogram (ECG) reveals that heart chamber activation and repolarization are
much faster in mammals and birds compared to ectothermic vertebrates of similar size …
much faster in mammals and birds compared to ectothermic vertebrates of similar size …
Maximum heart rate does not limit cardiac output at rest or during exercise in the American alligator (Alligator mississippiensis)
In most vertebrates, increases in cardiac output result from increases in heart rate (fH) with
little or no change in stroke volume (Vs), and maximum cardiac output (Q̇) is typically …
little or no change in stroke volume (Vs), and maximum cardiac output (Q̇) is typically …
Low incidence of atrial septal defects in nonmammalian vertebrates
The atrial septum enables efficient oxygen transport by separating the systemic and
pulmonary venous blood returning to the heart. Only in placental mammals will the atrial …
pulmonary venous blood returning to the heart. Only in placental mammals will the atrial …
Venous pressures and cardiac filling in turtles during apnoea and intermittent ventilation
The amount of blood pumped by the heart (cardiac output) must be matched to the amount
of blood returning to the heart (venous return), but the factors determining cardiac filling are …
of blood returning to the heart (venous return), but the factors determining cardiac filling are …
The effects of embryonic hypoxic programming on cardiovascular function and autonomic regulation in the American alligator (Alligator mississippiensis) at rest and …
Reptilian embryos naturally experience fluctuating oxygen levels in ovo, and developmental
hypoxia has been established to have long-term impacts on cardiovascular function in …
hypoxia has been established to have long-term impacts on cardiovascular function in …
Contraction of atrial smooth muscle reduces cardiac output in perfused turtle hearts
Unusual undulations in resting tension (tonus waves) were described in isolated atria from
freshwater turtles more than a century ago. These tonus waves were soon after married with …
freshwater turtles more than a century ago. These tonus waves were soon after married with …
Contribution of active atrial contraction to cardiac output in anesthetized American alligators (Alligator mississippiensis)
Ventricular filling may occur directly from the venous circulation during early diastole or via
atrial contraction in late diastole. The contribution of atrial contraction to ventricular filling is …
atrial contraction in late diastole. The contribution of atrial contraction to ventricular filling is …
No evidence for pericardial restraint in the snapping turtle (Chelydra serpentina) following pharmacologically induced bradycardia at rest or during exercise
Most animals elevate cardiac output during exercise through a rise in heart rate (f H),
whereas stroke volume (VS) remains relatively unchanged. Cardiac pacing reveals that …
whereas stroke volume (VS) remains relatively unchanged. Cardiac pacing reveals that …
Distribution and properties of cardiac and pulmonary β-adrenergic receptors in corn snakes (Pantherophis guttatus) and Boa constrictor (Boa constrictor)
G Abraham, S Hoffmann, I Hochheim, M Pees - … and Physiology Part A …, 2019 - Elsevier
The aim of the present study was to characterize β-adrenergic receptors in the snake heart
and lung of corn and Boa constrictor snakes. The β-adrenergic receptor binding sites were …
and lung of corn and Boa constrictor snakes. The β-adrenergic receptor binding sites were …