Calcium causes contraction
Arm in C shape
Pine trees in California near 2 water dams shaped like a pyramid
Vera lives in California away from the 2 water dams
Calcium causes contraction Form a "C" with your arm 
Two hydro pyramid dams in California with lots of pine trees 
Water from the 2 dams flows like blood vessels 
Vera and Pam live in California with no pine trees or dams. They warm your heart 
Used for hypertension, angina, and supraventricular arrhythmias
Most calcium channel blockers (end in -dipine) widen blood vessels
Calcium channel blockers have two main groups
Dihydropyridines target blood vessels (vascular smooth muscle) end in -dipine Water from dams flows like blood vessels. Di - hydro - pyr - idines
Non-dihydropyridines target the heart
Calcium channel blocker decreases heart contraction force
CCB block L-type calcium channels in the heart and the vascular smooth muscles
CCB decrease the calcium entering the cell during action potential
Slower pacemaker potential and slower depolarization
Extends phase 4 and phase 0 action potential, reducing SA node firing and heart rate
Decrease SA node firing
Decrease conduction velocity of AV node
*Calcium's role, Dihydropyridines, Non-dihydropyridines