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Demonstrates altered cardiovascular structure and heightened myocyte tension in juvenile rats exposed to developmental nicotine, suggesting reduced long-term cardiac reserve.
Developmental nicotine exposure (DNE) induced cardiovascular changes in neonatal/juvenile rats. Relative to controls, females had reduced left ventricular mass and dimensions, while both sexes had increased ejection fraction and fractional shortening. DNE increased calcium-evoked tension in cardiac myocytes, suggesting an adaptive mechanism as resting cardiac output was preserved. Despite normal resting function, these changes may reduce cardiac reserve, potentially compromising long-term cardiovascular health. These novel findings highlight how DNE disrupts cardiovascular development and function.
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Flanigan et al. (2024) studied this question.
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