Norman J. Holter, regarded as the “Father of mobile ECG monitoring”, developed the world’s first ambulatory cardiology monitor, and arguably, the world’s first wearable device, in 1954. The device weighed 85 pounds and had to be strapped to the patient like a bulky backpack. For the very first time, the patient’s cardiac wellbeing could be tested in his natural state, at any point during the day. No longer did the physician wait by the patient’s bedside to detect an arrhythmia, nor did the testing have to happen in a controlled clinical environment. Bhargav Rajan, senior research analyst at TechVision, concentrates on ECG monitoring.