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IBHRE DRUGS LATEST UPDATE 2024 -2025 ACTUAL EXAM
QUESTIONS WITH CORRECT VERIFIED ANSWERS/ AGRADE
What drug slows AV conduction to allow enough time to study APs/atrial signals? - Correct Answer - adenosine
what is the action and effect of adenosine? (2) - Correct Answer - fleeting depressive effect on SA and AV nodes Potent but bleeding vasodilatory effect
Drug that treats VT and VF and most commonly used class 1B drug by therapeutic plasma levels can be rapidly obtained - Correct Answer - lidocaine
what is the mechanism of lidocaine? - Correct Answer - slows depolarization and conduction velocity at fast heart rates during ischemia, hypokalemia, and acidosis
what are side effects of lidocaine? (5) - Correct Answer - - may suppress automaticity and EAD and LADs -confusion -dizziness -seizures -respiratory arrest
this drug is similar to lidocaine but is not suitable for emergent acute arrhythmia - Correct Answer - mexiletine
what are the side effects of mexiletine (2) - Correct Answer - - GI side effects -CNS side effects including tremors, blurred vision, uncoordinated movements 1 / 2
pg. 2 What drug would you pick for SVT, AT, multifocal atrial reentry, AV nodal reentry, macro reentrant VT - Correct Answer - verapamil
what is the mechanism of verapamil. (and diltiazem) - Correct Answer - blocks CA++ channels responsible for the depolarization of SA and AV nodes -specifically, it increases refractoriness and depresses automaticity and slows conduction in SA and AV nodes
what are the side effects of verapamil? - Correct Answer - negative inotropic properties, hypotension, constipation, dizziness, nausea, headache, edema, and bradyarrhythmia’s
what drug would you use to treat SVT, AT, AV nodal reentry and macro reentrant VT - Correct Answer - diltiazem (or verapamil)
why is moricizine controversial? - Correct Answer - decreases action potentials and refractory periods
what are the two main things BBs are used for. - Correct Answer - terminate or prevent AV nodal reentrant, SA nodal reentrant and macro reentrant tacos.slow ventricular response to AT (automatic or reentrant), AFL, and AF
- rhythm control and rate control
what are two BBs you need to know - Correct Answer - carvedilol metoprolol
how do BBs work? - Correct Answer - - reduce actions of catecholamines -pronounced effect of areas of rich adrenarche innervation - AKA SA and AV nodes
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