[The best in 2000 on arterial hypertension].
The authors showed, in a spin-off study of SYST-EUR, that 24% of subjects with isolated systolic hypertension on conventional measurement were not hypertensive during ambulatory blood pressure monitoring. Moreover, in white coat hypertension, treatment had no effect either on the electrical signs of left ventricular hypertrophy or on the incidence of clinical events (cerebrovascular accident and global cardiovascular complications), contrary to what is observed in permanent systolic hypertension. These results raise question as to the diagnosis and treatment of isolated systolic hypertension in the elderly and prompt to a larger usage (if not systematic) of ambulatory blood pressure monitoring in this context. The importance of systolic blood pressure and pulsed pressure For different reasons, diastolic blood pressure was thought to be of greater prognostic significance, as the very large majority of clinical trials recruited on the basis of the value of their diastolic blood pressure alone demonstrate. In recent years, the importance of systolic blood pressure has been underlined in many studies and 3 trials have shown the unquestionable benefits of treatment of isolated hypertension. It would also appear that the pulse pressure, which reflects arterial compliance, has considerable prognostic value. In the absence of established manometric criteria and mostly of therapeutic trials, the practical use of the pulse pressure remains questionable. The interruption of the doxazosin arm of the ALLHAT trial The ALLHAT (Antihypertensive and Lipid Lowering Treatment to Prevent Heart Attack Trial) study showed a doubling of the morbidity from cardiac failure, a 19% excess of cerebrovascular events and 16% of angina pectoris in subjects treated with doxazosin compared with those treated with chlorthalidone. The differences in blood pressure with treatment were minimal and, a priori, unable to explain these results. Beyond the fact that alphablockers cannot be considered as first-line antihypertensive therapy, without doubt, the affirmation that lowering the blood pressure provides the same benefit irrespective of the antihypertensive agent used, probably needs to be reviewed.
Service de cardiologie, hôpital de la Croix-Rousse, 103, Grande-Rue de la Croix-Rousse 69317 Lyon.
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D000367:Age Factors; D000368:Aged; D000959:Antihypertensive Agents / Q000627:therapeutic use; D006801:Humans; D006973:Hypertension / Q000188:drug therapy / Q000503:physiopathology / Q000523:psychology; D013599:Systole
D000959:Antihypertensive Agents