Cardiac structure and function in young and senescent mice heterozygous for a connexin43 null mutation.

Abstract excerpt

Downregulation of connexin43 (Cx43) in the failing heart has been implicated not only in arrhythmogenesis but in contractile dysfunction as well. Cx43-deficient mice exhibit reduced baseline conduction velocity and increased arrhythmias in response to ischemia. However, it is not known whether Cx43-deficient mice have any abnormalities in contractile function or, furthermore, whether cardiac dysfunction may be...

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