1. The attempts to amplify biosignal started with the development of electrocardiography . 2. Goldberger is the senior author of two textbooks on clinical electrocardiography . 3. An electrocardiography ( ECG ) unit was opened on 1 November 1955. 4. It has an appearance on electrocardiography of irregular electrical activity with no discernable pattern. 5. He co-owns four patents from electrocardiography . 6. He realised the importance of electrocardiography , and published on arrhythmias, particularly ventricular tachycardia. 7. The Cardiology department has echocardiography and computerized treadmill electrocardiography ( ECG ) alongside other facilities. 8. Electrocardiography is the measurement of these signals.9. Some indications for performing electrocardiography include: 10. Polysomnography may involve electroencephalography, electromyography, electrocardiography , air flow monitoring and audio video recording.