EKG Lead Placement & Rhythm Recognition Flashcards
6 cards from real PCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 EKG Lead Placement & Rhythm Recognition flashcards as text
What is the normal duration of the QRS complex?
Answer: 0.06-0.12 seconds
The normal QRS duration is 0.06-0.12 seconds, representing the time for ventricular depolarization through the normal conduction system.
Which lead is BEST for monitoring cardiac rhythm in most clinical settings?
Answer: Lead II
Lead II provides the best view of P waves and the overall cardiac cycle because its axis parallels the normal electrical pathway through the heart.
On EKG paper, each small square represents how many seconds?
Answer: 0.04 seconds
At the standard paper speed of 25 mm/sec, each 1mm small square equals 0.04 seconds.
ST segment elevation in contiguous leads on an EKG is a hallmark finding of:
Answer: Acute myocardial infarction (STEMI)
ST elevation in two or more contiguous leads is the defining EKG characteristic of an ST-elevation myocardial infarction requiring emergency intervention.
What should the PCT verify BEFORE applying EKG electrodes to a patient?
Answer: That the patient's skin is clean, dry, and free of excess hair at electrode sites
Clean, dry skin with minimal hair ensures optimal electrode adhesion and electrical conductivity for accurate EKG tracings.
Sinus bradycardia is characterized by a heart rate below:
Answer: 60 bpm
Sinus bradycardia is defined as a normal sinus rhythm with a ventricular rate below 60 beats per minute.