Ambulatory blood pressure monitoring and development of cardiovascular events in high-risk patients included in the Spanish ABPM registry:  the CARDIORISC Event study.
OBJECTIVE
Ambulatory blood pressure monitoring (ABPM) is superior to conventional BP measurement in predicting outcome, with baseline 24-h, daytime and night-time absolute values, as well as relative nocturnal decline, as powerful determinants of prognosis. We aimed to evaluate ABPM estimates on the appearance of cardiovascular events and mortality in a cohort of high-risk treated hypertensive patients.


RESULTS
A total of 2115 treated hypertensive patients with high or very high added risk were evaluated by means of office and 24-h ABPM. Cardiovascular events and mortality were assessed after a median follow-up of 4 years. Two hundred and sixty-eight patients (12.7%) experienced a primary event (nonfatal coronary or cerebrovascular event, heart failure hospitalization or cardiovascular death) and 114 died (45 from cardiovascular causes). In a multiple Cox regression model, and after adjusting for baseline cardiovascular risk and office BP, night-time SBP predicted cardiovascular events [hazard ratio for each SD increase: 1.45; 95% confidence interval (CI) 1.29-1.59]. Values above 130 mmHg increased the risk by 52% in comparison to values less than 115 mmHg.


CONCLUSIONS
In addition to clinical determinants of cardiovascular risk and conventional BP, ABPM performed during treatment adds prognostic significance on the development of cardiovascular events in high-risk hypertensive patients. Among different ABPM-derived values, night-time SBP is the most potent predictor of outcome.
Department of Internal Medicine, Hospital Mutua Terrassa, University of Barcelona, Barcelona. adelasierra@mutuaterrassa.es
Alejandro
A
de la Sierra
José R
JR
Banegas
Julián
J
Segura
Manuel
M
Gorostidi
Luis M
LM
Ruilope
D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D018660:Blood Pressure Monitoring, Ambulatory; D002318:Cardiovascular Diseases / Q000175:diagnosis* / Q000401:mortality / Q000503:physiopathology; D002423:Cause of Death; D015897:Comorbidity; D005260:Female; D006333:Heart Failure / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology; D006760:Hospitalization; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000401:mortality / Q000503:physiopathology; D008297:Male; D012042:Registries; D013030:Spain / Q000453:epidemiology; D015996:Survival Rate