What excites the heart
The electrophysiologic property exhibited by the SA node.
What is automaticity?
Class III antiarrhythmic, with substantial beta-blocking effects.
What is sotalol?
ECG finding that differentiates Afib from Aflutter.
What is no discernible P-waves in Afib?
An ECG characteristic consistent with VT.
What is wide QRS complexes? (could also be AV dissociation)
HR threshold for defining bradycardia.
Spreads electrical impulses rapidly through the ventricles.
What are purkinje fibers?
Rate limiting ADR to continuing amiodarone therapy chronically.
What is pulmonary fibrosis?
First step in the pharmacologic management of Afib with RVR.
What is amiodarone?
Prolonged PR intervals, but one P-wave for every QRS.
What is 1st degree AV block?
Blockade of outward potassium movement prolongs this electrophyisiologic parameter.
What is the refractory period?
A class Ib antiarrhythmic targets this ion channel.
What is sodium?
CHA2DS2-VASc score that mandates consideration for anticoagulation for chronic stroke prevention.
What is 2 for men and 3 for women?
Second line pharmacologic therapy for VT with a pulse.
What is lidocaine?
Pharmacologic agent that may enhance AV nodal conduction and be tried in less advanced AV blocks.
What is atropine or epinephrine?
Serves as the gatekeeper for electrical impulses trying to reach the ventricles from the atria.
What is the AV node?
An absolute C/I for use of Ic antiarrhythmics.
What is structural heart disease (IHD, HF)?
Drug of choice for rhythm conversion in a pt with HF.
What is amiodarone?
Pts who experience VT without a reversible cause will need this device.
What is an ICD?
Progressive PR interval prolongation, followed by a dropped QRS complex.
What is 2nd degree type I AV block? (Wenkebach)
Represents the time it takes for an electrical impulse to travel from the SA node to and through the AV node on an ECG.
What is the PR interval?
Drug used for slowing ventricular rate that is also used in HFrEF.
What is digoxin?
Duration of anticoagulation needed after successful cardioversion.
What is 4 weeks?
A polymorphic VT that is usually caused by drugs prolonging refractory period.
What is Torsades de Pointes?
A drug that can exacerbate sinus bradycardia.
What are beta-blockers, non-DHP CCBs, sympatholytics, propafenone, amiodarone, etc...