Certification Preparation
What EKG change occurs after the ST segment elevations return to baseline? - correct answer
✔✔T wave inversion
A normal P wave does not exceed ____ and in amplitude and is smaller than ____ wide. -
correct answer ✔✔2.5 mm to 3 mm
__________ occurs longer than 30 seconds or requires direct current (DC) for stabilization. -
correct answer ✔✔sustained VT
What are the three layers of the heart? - correct answer ✔✔epicardium, myocardium,
endocardium
_____________ is the point where the QRS complex ends, and the ST segment begins. - correct
answer ✔✔J point
In the context of atrial tachycardia, what describes a narrow QRS complex? - correct answer
✔✔Conduction through the AV node and His-Purkinje system
The P waves characteristic of left atrial abnormality can be ________. - correct answer
✔✔biphasic
What does an echocardiogram measure? - correct answer ✔✔The degree of cardiac chamber
enlargement
A ____ complex occurs when the entire QRS complex is negative. - correct answer ✔✔QS
, What is a transducer used for? - correct answer ✔✔The ECHO device used to conduct
ultrasound energy and create the visual picture of the heart.
What is a characteristic feature of a ventricular bigeminy pattern? - correct answer ✔✔Regular
alternation of PVC and normal beat
The PR interval indicates the time an action potential travels through the atria and the
_________________. - correct answer ✔✔AV junction
How does the morphology of PVCs vary? - correct answer ✔✔Depending on the origin within
the ventricles
Which of the following is a characteristic of Accelerated Idioventricular Rhythm (AIVR)? - correct
answer ✔✔Heart rate usually between 50 and 00 bpm
What medication is used as an arrhythmia suppression during digitalis toxicity? - correct answer
✔✔Lidocaine
Excessive stimulation of the heart's parasympathetic fibers will cause ____________. - correct
answer ✔✔Fainting
If a patient's ECG shows signs of ischemia, this means: - correct answer ✔✔An inadequate
blood supply to the heart.
What type of pacemaker will patients with congestive heart failure with left ventricular
conduction delays receive? - correct answer ✔✔Biventricular
PACs can initiate arrhythmias by either ______ or _____ processes. - correct answer ✔✔Focal;
reentrant