How many paper speeds are necessary for ECG recording?(a) One(b) Minimum two(c) Can be any(d) Max twoThe question was posed to me at a job interview.The doubt is from System Concepts topic in portion Patient Monitoring System of Biomedical Instrumentation

How many paper speeds are necessary for ECG recording?(a) One(b) Minim

1.	How many paper speeds are necessary for ECG recording?(a) One(b) Minimum two(c) Can be any(d) Max twoThe question was posed to me at a job interview.The doubt is from System Concepts topic in portion Patient Monitoring System of Biomedical Instrumentation
Answer» Right choice is (b) Minimum two The best I can explain: The instability of the baseline, originating from the changes of the contact impedance, demands the application of the automatic baseline stabilizing circuit. A minimum of two PAPER SPEEDS is necessary (25 and 50 mm PER SEC) for ECG RECORDING.

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