Cardio Meds I Flashcards
What are the Vasodilators?
Nitrates
Calcium Channel Blockers
What are the Nitrates
Nitroglycerin
Isosorbide Dinitrate
Tell me what the Ca++ Channel Blockers are
Amlodipine
Nifedipine
Diltiazem
Verapamil
The Calcium Channel blockers are broken into two types of drugs. What are they?
Dihydropyridines (Amlodipine and Nifedipine)
Non-dihydropyridines (Verapamil and Diltiazem)
Explain what the Nondihydropyridines do. Why are the different from the dihydropyridines?
- Cause less vasodilation and more cardiac depression
- Negative effects at the SA/AV nodes, causing reductio in heart rate and contractility
- They are used for supra ventricular tachycardias and non-obstructive cardiomyopathies
- Used for A-fib and A-flutter
Explain the dihydropyridines and what they do in the heart
- have more vascular selectivity with fewer cardiac effects
- Do not suppress the AV node conduction of SA node automaticity
Explain to me what the MOA of the vasodilators is
They cause smooth muscle dilation of arteries and veins
Why do you use nitrates?
For angina and CHF
BUT, there is a difference between Isosorbide Dinitrate and Nitro. Why would you use one over the other?
You use Isosorbide Dinitrate for FREQUENT STABLE angina (and nitro for just plain old angina)
What are the common S/E of both Nitrates?
HA
Hypotension
Tachycardia
What is a common S/E in just Isosorbide Dinitrate?
Re-bound HTN
The common drug interactions of the nitrates are…?
PDE-5 inhibitors (Cialis and Viagra)
What is important to remember about Isosorbide Dinitrate when it comes to how much should be given?
Everyone needs to have 8-12 hours of nitrate-free time daily. Taken in the morning, when the risk of having angina is the highest, and it is out of the system for the night time. This reduces the chance of developing tolerance to nitrates
How do the dihydropyridine CCBs work? (MOA)
they cause vasodilation due to blocking calcium channels in vascular smooth muscle and myocardium
What are their indications?
Angina (chronic, stable, vasospastic)
HTN
Common S/E of the dihydropyradines are…?
Nausea
Palpitation
Peripheral Edema
Elderly hypotension
What is the main drug interaction with the dihydropyridines?
Grapefruit juice
Between the two dihydropyridines, which is more likely to cause hypotension?
Nifedipine
Remind me again what the dihydropyridines are?
Amlodipine and Nifedipine
The non-dihydropyridines do what?
They dilate coronary arteries and decreased myocardial O2 demands