Question

The four measurements of QRS and a fifth measurement called ________ based on height, duration and offset to those of the patient’s normal QRS are compared.

(a) QRS polarity

(b) R-to-R interval

(c) Wiggle

(d) Distance D

The question was posed to me in an international level competition.

Enquiry is from Central Monitors topic in division Patient Monitoring System of Biomedical Instrumentation

Answer 1

Right option is (d) Distance D

Best explanation: The four measurements of QRS and a fifth measurement called ‘distance D’ based on height, duration and offset to those of the patient’s normal QRS are compared. Beats are classified on the basis of their deviation from the normal and maybe definitely normal, probably normal, probably PVC or definitely PVC.