PCT EKG Lead Placement & Rhythm Recognition 3

Question 1

What is the normal duration of the QRS complex?

Accepted Answer

0.06-0.12 seconds

Answer

The normal QRS duration is 0.06-0.12 seconds, representing the time for ventricular depolarization through the normal conduction system.

Question 2

Which lead is BEST for monitoring cardiac rhythm in most clinical settings?

Accepted Answer

Lead II

Answer

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.

Question 3

On EKG paper, each small square represents how many seconds?

Accepted Answer

0.04 seconds

Answer

At the standard paper speed of 25 mm/sec, each 1mm small square equals 0.04 seconds.

Question 4

ST segment elevation in contiguous leads on an EKG is a hallmark finding of:

Accepted Answer

Acute myocardial infarction (STEMI)

Answer

ST elevation in two or more contiguous leads is the defining EKG characteristic of an ST-elevation myocardial infarction requiring emergency intervention.

Question 5

What should the PCT verify BEFORE applying EKG electrodes to a patient?

Accepted Answer

That the patient's skin is clean, dry, and free of excess hair at electrode sites

Answer

Clean, dry skin with minimal hair ensures optimal electrode adhesion and electrical conductivity for accurate EKG tracings.

Patient Care Technician Test Practice Test

Patient Care Technician Test Practice Test

PCT EKG Lead Placement & Rhythm Recognition 3