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What is the value of the refractory period from the previously identified QRS complex?(a) 200 ms(b) 198 ms(c) 192 ms(d) 215 msThis question was posed to me during an online exam.This intriguing question originated from Bedside Patient Monitoring System topic in portion Patient Monitoring System of Biomedical Instrumentation

Answer»

Correct answer is (c) 192 ms

Best explanation: The QRS detector checks the QRS detection signal for the presence of the PEAK of an R wave. Search BEGINS after an ABSOLUTE REFRACTORY period from the previously identified QRS complex. The value used for the refractory period is 192 ms. This helps to prevent a T wave from being identified as an R wave.



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