Ghoul
Member
Does CCB reduce RHR like Beta-blockers?
No, different mechanism.
Amlodipine is an L channel calcium blocker.
Cilnipidine is an L and N blocker.
Blocking N lowers levels of noradrenaline.
Noradrenaline stimulates alpha receptors in the heart, increasing heart rate.
Unlike intermittently released adrenaline, noradrenaline is continuously released, so reducing it lowers RHR.
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