TITLE

Amlodipine or lisinopril was not better than chlorthalidone in lowering CHD risk in hypertension

PUB. DATE
November 2003
SOURCE
ACP Journal Club;Nov/Dec2003, Vol. 139 Issue 3, pA-15
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Although not mentioned by Dr. B.M. Psaty in his commentary where concerns have been raised over the heart failure results in anti-hypertensive and lipid-lowering treatment to prevent heart attack trial (ALLHAT). Asymptomatic left ventricular (LV) systolic dysfunction is common in older patients, particularly men and patients with cardiovascular risk factors. ALLHAT participants were high-risk patients, and many may have had asymptomatic LV dysfunction that could have been unmasked at the start of the study by withdrawal of diuretic therapy. The early difference in heart failure (HF) incidence observed between the lisinopril and chlorthalidone groups, as well as the merging of the HF curves toward the end of the trial, is consistent with this possibility. Furthermore, a true difference in HF incidence over 5 years should have resulted in greater mortality in the lisinopril group, this did not occur. A second concern is the validation of the HF endpoint, the diagnosis of which was up to the local ALLHAT investigator. An ALLHAT subcommittee, which reviewed a small fraction of HF hospitalizations, only agreed with 85% of diagnoses. In contrast, blinded endpoint committees in STOP-Hypertension and in ANBP2, both of which included an angiotensin-converting enzyme inhibitor group, found no difference in HF incidence. In the latter study, men appeared to benefit more from ACE inhibitors than diuretics, consistent with the epidemiology of asymptomatic LV dysfunction. Third, there seem to be race-based differences between the lisinopril and chlorthalidone groups with respect to the risks for stroke, and possibly combined coronary heart disease, combined cardiovascular disease, as well as HF. By ignoring the arguments for and against the ALLHAT results, we may neglect to pursue potentially important racial and gender differences in hypertension treatment.
ACCESSION #
11533532

 

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