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Cardio‐respiratory synchronization and myocardial function in hypoxic carp, Cyprinus carpio L.
Author(s) -
Glass M. L.,
Rantin F. T.,
Verzola R. M. M.,
Fernandes M. N.,
Kalinin A. L.
Publication year - 1991
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1991.tb04352.x
Subject(s) - bradycardia , cyprinus , hypoxia (environmental) , biology , carp , medicine , cardiology , tachycardia , respiratory system , heart rate , endocrinology , anatomy , fishery , fish <actinopterygii> , oxygen , blood pressure , chemistry , organic chemistry
Moderate hypoxia (Pio 2 , = 50 mmHg) caused tachycardia in carp, Cyprinus curpio Linnaeus, whereas severe hypoxia (Pio 2 , from 30 to 5 mmHg) coincided with bradycardia accompanied by alterations of the waveforms of the electrocardiogram. A cardio respiratory synchronization developed during hypoxia and was maintained during bradycardia. The data raised the question: Does hypoxic bradycardia in part result from myocardial dysfunction or only from regulatory adjustments?