Hey guys had a quick concept that i got stuck on. Kaplan notes say that hypercalcemia shortens the QT segment. And then they go on to say that QT segment corresponds to the plateau phase of the action potential. I was confused as to how this would happen. I was thinking that since in the plateau phase the calcium channels are open and calcium moves into the cell. So in hypercalcemia more calcium would move in hence prolonging the QT segment rather than shortening it. I looked at it from this angle but maybe there is a different way to look at it. Would appreciate the help. thanks.
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A mark or sign made by an individual on an instrument or document to signify knowledge, approval, acceptance, or obligation. The term signature is generally understood to mean the signing of a written document with one's own hand. mark is ordinarily a cross or X made in substitution for the signature of an individual who is unable to write. In the absence of contrary statutory provision, a mark can be used by an individual who knows how to write but is unable to do so because of a physical illness or disability.