Question

In the ST segment measurement _________  is either between the P and Q waves or in front of the P wave.

(a) J point

(b) Isoelectric baseline

(c) ST measurement point

(d) ST value

This question was addressed to me by my school principal while I was bunking the class.

This intriguing question comes from QRS Detection Techniques topic in division Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

Answer 1

The correct choice is (b) Isoelectric baseline

The explanation is: The current standard for determining the ST segment measurement is by measuring the voltage difference between the value at a point 60-80 ms after the J point and the isoelectric baseline. The isoelectric baseline is either between the P and Q waves (the P-R interval) or in front of the P-wave (the T-P interval).