Heart monitor

My dear sweet husband is to wear a heart monitor. He may have to wear it up to a month. Electrodes stuck to his chest and attached to a small recording monitor. Every time or any time he feels his heart racing, he is to hit the record button on the monitor. It will then record the previous 45 seconds and the next 45 seconds of the heart. Later you send this in over the phone. It sounds so simple. For whatever reason, he's not following the instructions. Why is it that when it comes to doctors and doing what you are told, his whole family gets lost in the translation.