A tablet that gives patients with heart problems a medical diagnosis within minutes could dramatically improve healthcare for rural residents far from hospitals. The Cardio Pad, a touch-screen heart monitoring device, invented by Cameroonian entrepreneur Arthur Zang and recent winner of the Royal Academy of Engineering’s Africa Prize, records a patient’s heart activity via Bluetooth-connected electrodes. It sends a digitized electrocardiogram (ECG or EKG) to a national healthcare center for a cardiologist to evaluate and return a diagnosis to the patient. The whole process takes less than 20 minutes and the doctor and patient never have to interact.