Pharmaco Flashcards
What is effective refractory period?
Cardiac muscles cant undergo another action potential
What is the term to describe the concept of cells able to change its internal electrical balance to reach threshold?
Excitability
What is the term to describe the concept of cells being able to generate an electrical impulse without being stimulated?
Automaticity
What is the term to describe the concept of cells able to transfer electrical impulses to the next cell?
Conductivity
What channels are blocked by 1A, 1B and 1C?
Na+ channel blockers
Example of class 1A drug is …
Procainamide
Example of class 1B drug is …
Lidocaine
Example of class 1C drug is …
Flecainide
What is the clinical use of flecainide?
Used for refractory ventricular tachycardias that tend to progress to VF
What are class 2 drugs?
Beta-blockers
Examples of class 2 drugs are …
Metroprolol, propranolol
What are the clinical uses of class 2 drugs?
- Tachycardia caused by sympathetic activation
- Atrial fibrillation
- AV nodal reentrant tachycardia
- Reduces sudden arrhythmic death post-MI
What are class 3 drugs?
Potassium channel blockers
Examples of class 3 drugs are …
Amiodarone
What are the clinical uses of Amiodarone?
What are the adverse effects of amiodarone?
Symptomatic bradycardia and heart block
What are class 4 drugs?
Non-DHP calcium channel blockers
Examples of class 4 drugs are …
Verapamil, Diltiazem
What are the clinical uses of Verapamil?
- Supraventricular tachycardia
- hypertension
- angina
What are the adverse effects of verapamil?
hypotension
Which group of patients are contra indicated for verapamil?
Patients with preexisting depressed cardiac function
What medication is used in emergency situation for supraventricular tachycardia?
Adenosine
What is the MOA of Adenosine
What are the adverse effects of adenosine
What are the concequences of hypertension?
What are the examples of ACE-I?
Lisinopril, captopril, Enalapril
What happens to the amt of Ang I when ACE-I are used?
Increases
What happens to the amt of Ang I and II when renin inhibitors are used?
decreases
What are the adverse effects of ACE-I?
Which group of patients are contraindicated for ACE-I?
Pregnant women
Examples of Ang II type 1 receptor blockers are …
Valsartan, Losartan, Candesartan, Irbesartan, Telmisartan
What are the adverse effects of Ang II type 1 blockers
Less/ no dry cough
What is the MOA Ang II type 1 blockers?
Which group of patients are contraindicated for Ang II type 1 blockers
Pregnant women
Which group of patients are contraindicated for beta blockers?
Patients with asthma
Which beta blockers are approved for heart failure?
- Carvedilol
- Bisoprolol
- Metoprolol XL
- Nebivolol
What are the clinical uses for beta blockers
What are the adverse effects of beta blockers?
What is the MOA of Thiazides?