RCES Exam Questions with All CORRECT ANSWER s
Question : What is ARVD and when does it occur?
CORRECT ANSWER : Arrhythmogenic Right Ventricular
dysplasia; occurs when the RV myocardium is replaced by fatty and fibrotic tissue
Question : What are afterdepolarizations?
CORRECT ANSWER : Abnormal secondary voltage
depolarizations during the cardiac action potential
Question : What are the two types of afterdepolarizations?
CORRECT ANSWER : EADs (early after depolarizations)
and DADs (delayed afterdepolarizations
Question : What does the QT interval represent?
CORRECT ANSWER : ventricular depolarization and
repolarization
Question : What is antedromic conduction?
CORRECT ANSWER : Antedromic conduction is a type of
AVRT in which the impulse travels down the pathway and up the AV node--seen in WPW
Question : What is orthodromic conduction?
CORRECT ANSWER : A type of AVRT in which the
impulse travels down the AV node and up the pathway--this type of conduction is more common
Question : What 3 criteria are needed to sustain a reentry
circuit?
CORRECT ANSWER : 1.) Parallel pathways that are
connected proximally and distally, forming an electrical circuit 2.) One of the pathways needs a refractory period that's substantially longer than the refractory period of the other 3.) The pathway with the shorter refractory period must conduct electrical impulse more slowly than the other pathway
Question : What is a normal AH interval?
CORRECT ANSWER : 50-140ms
Question : What is a normal HV interval?
CORRECT ANSWER : 35-55ms
Question : What is a normal HBE?
CORRECT ANSWER : <30ms
Question : What is a normal PA interval?
CORRECT ANSWER : 25-55ms
Question : What is a normal QTc?
CORRECT ANSWER : For men: <450, For women <470
Question : What is a normal QRS interval?
CORRECT ANSWER : <120ms
Question : What is Ohm's Law?
CORRECT ANSWER : V = IR; V= voltage measured in
volts, I= current measured in amps and R= resistance ohms
Question : What is the most likely rhythm is capture beats or
fusion beats are seen on the EKG?
CORRECT ANSWER : Ventricular Tachycardia because
both beats demonstrate AV dissociation
Question : When do EADs occur?
CORRECT ANSWER : EADs are seen in phase 2 or phase 3
of the action potential
Question : What is the formula for converting Fahrenheit to
Celsius?
CORRECT ANSWER : C= (5/9) (F-32)
Question : What is the formula for converting Celsius to
Fahrenheit?