FREE EKG Certification Question and Answers Flashcards
6 cards from real EKG certification Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE EKG Certification Question and Answers flashcards as text
On an EKG, what is the normal duration of the QRS complex?
Answer: 0.06 to 0.10 seconds
The normal QRS duration is 0.06 to 0.10 seconds, representing the time for ventricular depolarization through the His-Purkinje system.
A patient presents with an irregularly irregular rhythm with no discernible P waves on EKG. What is the most likely diagnosis?
Answer: Atrial fibrillation
Atrial fibrillation is characterized by an irregularly irregular rhythm with fibrillatory baseline and absence of organized P waves.
Which EKG finding suggests left ventricular hypertrophy using the Sokolow-Lyon criteria?
Answer: S wave in V1 plus R wave in V5 or V6 exceeds 35 mm
The Sokolow-Lyon criteria diagnose LVH when the sum of the S wave in V1 and the R wave in V5 or V6 exceeds 35 mm.
What does the presence of Q waves in leads V1 through V4 on an EKG most likely indicate?
Answer: Anterior myocardial infarction
Pathological Q waves in the anterior leads V1-V4 indicate prior anterior wall myocardial infarction with transmural necrosis.
During EKG interpretation, what artifact is most commonly caused by patient movement or shivering?
Answer: Baseline wander and muscle tremor artifact
Patient movement and shivering cause irregular baseline distortion and high-frequency muscle tremor artifact on the EKG tracing.
What is the significance of ST depression in leads V1-V3 when accompanied by a tall R wave?
Answer: Posterior myocardial infarction
ST depression with tall R waves in V1-V3 are reciprocal changes that represent ST elevation on the posterior wall, indicating posterior MI.