Cardiac Flashcards
(12 cards)
True or False? Nitroglycerin causes peripheral vasodilation to cause blood pooling and reduce preload.
True
True or False? Nitroglycerin causes profound coronary artery and sinus vasodilation.
False
How does metoprolol work as an antiarrhythmic?
It blocks catecholamines at beta 1 adrenergic receptors
How are Verapamil and Diltiazem classed?
They are calcium channel blockers
What is the antidote for a digoxin overdose?
Digibind
What is the antidote for a digoxin overdose?
Digibind
How does digoxin affect inotropy and chronotropy?
It increases inotropy and decreases chronotropy without increasing myocardial oxygen demand
How do calcium channel blockers work?
They block L-type calcium channels, slowing conduction in the SA and AV nodes and reducing heart rate
What are the mechanisms that cause dysrhythmias?
Abnormal conductions or pacemakers
What antiarrhythmic is indicated for termination of Torsades des Pointes?
Magnesium Sulfate
3 methods of homeostasis resulting from bl vessel injury?
- activation of platelets
- constriction of bl vessels
- activation of clotting factors
How do a thrombus and an embolus differ?
A thrombus adheres to a vessel wall while an embolus is a free-floating clot
