rate and determine the duration of key periods of the ECG. 1 Identify and label the P wave, QRS complex, T wave, P-R interval, R-R interval, and Q-T interval on Tracings 1 2 in Figure 12.31. Tracing 1...

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Extracted text: rate and determine the duration of key periods of the ECG. 1 Identify and label the P wave, QRS complex, T wave, P-R interval, R-R interval, and Q-T interval on Tracings 1 2 in Figure 12.31. Tracing 1 Tracing 2 FIGURE 12.31 ECG tracings 2 Calculate the heart rate for each tracing. Are the values normal or abnormal? Heart Rate Tracing 1: Heart Rate Tracing 2: 3 Determine the R-R interval, QRS duration, P-R interval, and Q-T interval for each tracing, and record the valı Table 12.4. TABLE 12.4 Values for ECG Periods Value Tracing 1 Tracing 2 R-R interval QRS duration P-R interval Q-T interval 曲