The Amphibian Heart

Schmidt-Ukaj, Silvana; Gumpenberger, Michaela; Posautz, Annika; Strauss, Verena

doi:10.1016/j.cvex.2022.01.002

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…The trabeculae, forming deep sacs, gather and retain blood during diastolic filling. This mechanism appears to enable a partial separation of the blood not only during this final phase but also while the blood is being expelled during systole [26][27][28]. There are also exceptions, such as tadpoles and some adult salamanders, which have pulmonocutaneous circulation.…”

mentioning

confidence: 99%

Cardiovascular Response to Exercise in Vertebrates: Update

López-Román,

Gómez-Lucas,

Jiménez-Herranz

et al. 2024

Preprint

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Physical exercise is the greatest stress on the cardiovascular system, not only in humans but also in all vertebrates. Consequently, the cardiovascular response cannot be thought of as having only one "anthropocentric" interpretation. The modulation of cardiac output (Q) in response to exercise in the five major groups of vertebrates exhibits considerable variability. Moreover, the response of the heart rate (HR) and the stroke volume (SV), the fundamental factors that cause the rise in Q, is also highly variable. The difference in the range of HR is difficult to determine in many vertebrates, both at rest and at maximal effort. Additionally, the increase in SV varies among vertebrates. For example, while rainbow trout and leopards increase their SV by increasing end diastolic volume (EDV), humans do so at the expense of both increasing EDV and reducing end systolic volume (ESV). The variation in arterial pressure that arises during exercise varies notably among vertebrates, such as amphibians, whose blood pressure values do not increase as significantly as in mammals. Such differences in cardiovascular response among vertebrates may be linked to their habitat or living environment. This review aims to analyze the cardiovascular response of vertebrates to physical exercise as the most common stressor.

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mentioning

confidence: 99%

Cardiovascular Response to Exercise in Vertebrates: Update

López-Román,

Gómez-Lucas,

Jiménez-Herranz

et al. 2024

Preprint

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Ultrasound description of the coelomic cavity of the axolotl (Ambystoma mexicanum) in a clinically healthy population: a pilot study

Vieu,

Le Poul,

Tur

et al. 2024

Sci Rep

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Axolotls (Ambystoma mexicanum) are extensively studied for their relevance in human medical research. Despite being critically endangered in the wild, they have gained popularity as household pets. Although they have been kept in captivity for over a century, detailed descriptions of their coelomic organ anatomy remain limited. Also, this species exhibits significant variations compared to other amphibians. Ultrasound is a non-invasive and painless medical imaging technique, ideally suited for investigating internal organs or structures. This study focused on describing the ultrasound appearance of the axolotl coelomic cavity. It details the identification, localization and parenchymal description of major organs in 28 neotenic axolotls using ultrasound frequencies ranging from 7 to 15 MHz. The accuracy of the results was validated by comparing ultrasound findings with necropsy results from one male and one female axolotl. The heart, lung surface, liver and reproductive tracts were visualized. Measurements, along with confidence intervals, were calculated for the spleen, kidneys, testicles, gastric wall, gallbladder, and pylorus. Occasional detection of hyperechoic millimetric particles in the gallbladder or ascites was noted. However, visualization of the pancreas and bladder was not possible. This research outcomes involve the development of a comprehensive atlas comprising images obtained throughout the study. Additionally, the experiment established a reproducible and readily accessible protocol for conducting anatomy-morphological assessments in axolotl medicine. This protocol stands as a crucial preliminary stage before advancing to lesion identification.

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The Amphibian Heart

Cited by 2 publications

References 33 publications

Cardiovascular Response to Exercise in Vertebrates: Update

Cardiovascular Response to Exercise in Vertebrates: Update

Ultrasound description of the coelomic cavity of the axolotl (Ambystoma mexicanum) in a clinically healthy population: a pilot study

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