Physicians at St. Louis Cardiology Consultants have opened a Web portal to a segment of patients, part of a systemwide rollout of electronic medical records across SSM Health Care. Through the portal, cardiology patients can hop online to request prescription refills, check portions of their medical records, or send questions about their conditions. Within a few years, the cardiologists expect to be trading e-mails with patients and possibly holding real-time Web chats.