Search results
Results From The WOW.Com Content Network
Lercanidipine (trade name Zanidip, among others) is an antihypertensive (blood pressure lowering) drug. It belongs to the dihydropyridine class of calcium channel blockers , which work by relaxing and opening the blood vessels allowing the blood to circulate more freely around the body.
Slowing down the conduction of electrical activity within the heart, by blocking the calcium channel during the plateau phase of the action potential of the heart (see: cardiac action potential), results in a negative chronotropic effect, or a lowering of heart rate. This can increase the potential for heart block.
Some drugs and medications affect heart rate, meaning you may have a lower maximum heart rate and target zone, says Dr. Steinbaum. “If you have a heart condition or take medication, ask your ...
Most people who have taken too much of a calcium channel blocker, especially diltiazem, get slow heart rate and low blood pressure (vasodilatory shock). [1] This can progress to the heart stopping altogether. [2] CCBs of the dihydropyridine group, as well as flunarizine, predominantly cause reflex tachycardia as a reaction to the low blood ...
Compared with certain other L-type calcium channel blockers (for example those of the phenylalkylamine class such as verapamil) that have significant action at the heart, the dihydropyridine calcium channel blockers lower blood pressure mainly by relaxing the smooth muscle of the blood vessel walls. [3]
Reverse use dependent drugs that slow heart rate (such as quinidine) can be less effective at high heart rates. [11] The refractoriness of the ventricular myocyte increases at lower heart rates . [ citation needed ] This increases the susceptibility of the myocardium to early Afterdepolarizations (EADs) at low heart rates.
Chronotropic effects (from chrono-, meaning time, and tropos, "a turn") are those that change the heart rate.. Chronotropic drugs may change the heart rate and rhythm by affecting the electrical conduction system of the heart and the nerves that influence it, such as by changing the rhythm produced by the sinoatrial node.
BRL-32872 does not exhibit reverse-use dependence; meaning efficacy is conserved regardless of heart rate. [7] The drug is also easily administered orally or via intravenous injection, and has no effect on resting membrane potential. [5] The effects BRL-32872 have been well documented in animal models.