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The number of steps involved in the detection of QRS complex is ______

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The number of steps involved in the detection of QRS complex is ______

(a) One step

(b) Two steps

(c) Three steps

(d) Four steps

The question was posed to me in semester exam.

My question is from Clinical Data Interchange/Exchange Standards topic in section Telemedicine Technology of Biomedical Instrumentation

1 Answer

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Right choice is (b) Two steps

Explanation: The ECG is first preprocessed to enhance the QRS complex while suppressing noise, artifact and non-QRS portions of the ECG. QRS detection is now almost universally performed digitally in a two-step process. The output of the preprocessor stage is subjected to a decision rule that confirms detection of QRS if the processor output exceeds a threshold.

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