A wireless heart monitor developed by a Singapore medical technology company could soon be used in Britain, Brazil, Poland and Malaysia.

The compact plastic device, called the Spyder, is attached to the chest using removable adhesive.

It can wirelessly transmit a patient's heart activity to a mobile phone specially outfitted with software developed by Web Biotech, the company behind the device.

The Spyder runs on two triple-A batteries, and can continuously monitor a patient's heart activity for up to three days. The information is then encrypted and transmitted to the company's cloud database, and can be accessed by the patient's doctor from anywhere in the world.

More than 300 patients have used the Spyder in Singapore. It was launched last August, and is carried by at least three private hospitals here.

The company is in talks with public and private hospitals to supply them with the product.

Another device now widely used to monitor a patient's heart activity - called a Holter monitor - is very bulky and costs about $220 per day to use, said Web Biotech's medical director, Dr Philip Wong. In contrast, the Spyder costs patients only about $70 to $100 per day.

Dr Wong, a cardiologist at the National Heart Centre, said those in the medical technology industry in Singapore "have a very big playground" in Asia's growing health-care market.

"We used to lack a certain critical mass... but now, it is a lot more mature, with more support and infrastructure for med-tech start-ups."