INR self-management can reduce severe thromboembolic and hemorrhagic compli
cations following mechanical heart valve replacement. Beginning anticoagula
tion therapy immediately in the postoperative period further reduces antico
agulant-induced complications. Data were collected from the first 600 survi
ving patients (from a total study sample of 1200 patients) who completed fo
llow-up of at least 2 years. Patients were randomly divided into a selfmana
gement group and a control group. INR selfmanagement reduced severe hemorrh
agic and thromboembolic complications (P = 0.018). Nearly 80% of INR values
recorded by patients themselves, regardless of educational level, were wit
hin the target therapeutic range of INR 2.5-4.5, compared with 62% of INR v
alues monitored by family practitioners. Only 8.3% of patients trained in s
elf-management immediately after surgery were unable to continue with INR s
elfmanagement. The results differed slightly between patient groups with di
fferent levels of education. We conclude that all patients for whom anticoa
gulation is indicated are candidates for INR self-management regardless of
education level.