M-Health Care for Patients After AMI on Disease Perception, Self-Efficacy, Anxiety and Cardio-Respiratory Fitness

Inclusion Criteria: * Taiwanese, understand Chinese * Patients who are over 20 years old and have AMI (including ST segment ascending and non-ST segment ascending), diagnosed by percutaneous coronary intervention and without complications within 30±5 days, the left ventricular injection rate is greater than 40% . * Ability and willingness to provide informed consent. * Have a smartphone. * Can receive and send smartphone messages. Exclusion Criteria: * Those who can't express their wishes clearly (such as mental dysfunction) * mental disorder * Patients who participate in other research projects * Planned coronary artery bypass surgery or other diseases that require continuous heart care. * Abuse of alcohol or narcotics. * Left ventricular ejection fraction (LVEF) is less than 40%.