True: 1. ECG is the recording of waveform that reflects the electrical activity of the heart, 2. 70 beats / min is normal rhythm, 3. T- wave contain only in ventricular repolarization, 4. P- wave represents in atrial depolarisation, False: 5. ECG leads contain only 6 leads, 6. QRS complex has both depolarisation and repolarization,

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