22 下列強心劑何者是藉由抑制 phosphodiesterase 來達到強心作..-阿摩線上測驗
2F Bryan 國三上 (2014/03/22)
Inotropic agents affect the contraction of the heart muscle. Positive inotropes stimulate and increase the strength of heart muscle contraction causing the heart rate to increase. Negative inotropic agents weaken the force of muscular contractions. Inotropic state depends on the amount of calcium in the cytoplasm of the heart muscle wall, as contractility of the heart depends on control of intracellular calcium i.e. control of calcium entry into the cell membrane and calcium storage in the sarcoplasmic reticulum. The main factors controlling calcium entry are activity of voltage gated calcium c... 查看完整內容 |
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