Letter to the Editor
Hypertension, Has Treatment a ` la Carte Arrived?
To the Editor:
The majority of patients with hypertension need at least 2
antihypertensive agents to achieve blood pressure (BP) goals.
After the Avoiding Cardiovascular Events in Combination
Therapy in Patients Living With Systolic Hypertension
(ACCOMPLISH) trial,
1
in which, despite a nearly similar BP
reduction, the fixed combination benazepril plus amlodipine
reduced the primary end point by 19.6% when compared with
the fixed combination benazepril plus hydrochlorothiazide in a
high-risk hypertensive population, many physicians thought
that diuretics were inferior to prevent cardiac events in the
whole hypertensive population. However, hospitalizations for
heart failure (HF) were not included in the primary end point
or in the main secondary end point. In addition, 60% of pa-
tients in this study at baseline were persons with diabetes, and
50% were obese, and it is well known that thiazides may
worsen metabolic profile.
In the Telmisartan Randomised Assessment Study in
ACE Intolerant Subjects With Cardiovascular Disease
(TRANSCEND),
2
the addition of telmisartan to participants
with diabetes and end-organ damage or cardiovascular disease
did not significantly reduce the primary end point, which in-
cluded cardiovascular death, myocardial infarction, stroke, or
hospitalization for HF. Remarkably, the rates of hospitaliza-
tions for HF were similar in both groups. How could this result
have emerged? Surprisingly, although the use of diuretics was
initially similar in both groups, the proportion of patients on
diuretics at the end of the study was significantly higher in the
placebo arm (33.7% vs 40.0%, P 0.0001). It is likely that, in
some patients, diuretics were not prescribed for improving BP
control but rather for treating clinical HF. Therefore, the
greater use of diuretics may have decreased HF hospital admis-
sions in the placebo group and obscured the benefit from
telmisartan. Furthermore, diuretics may mask HF symptoms
and secondarily reduce HF diagnosis.
In a recent study performed by Ogunyankin et al.,
3
an ag-
gressive BP-lowering strategy with either calcium channel
blockers or diuretics was associated with a significant improve-
ment of left ventricular diastolic function; however, there was a
trend toward greater diastolic-function improvement in the
diuretic-based subgroup. These findings have been confirmed
in a recent meta-analysis, which reported that diuretics repre-
sent the most effective class of drugs in preventing HF in hy-
pertensive patients, followed by renin-angiotensin system in-
hibitors.
4
Calcium channel blockers and -blockers were
found to be less effective in HF prevention. With these data the
authors concluded that diuretics and renin-angiotensin system
inhibitors should be used as first-line antihypertensive therapy
for HF prevention in the hypertensive population at risk to
develop HF.
What do these results indicate? It appears that in hyperten-
sives with obesity, diabetes, or at high risk to develop diabetes,
the combination of a renin-angiotensin system inhibitor plus a
calcium channel blocker would be preferable, whereas in pa-
tients at risk to develop HF, such as in those with ventricular
dysfunction, the renin-angiotensin system inhibitor could
likely be combined with a diuretic. These findings move us
closer to patient-tailored, à la carte therapy for hypertension.
Carlos Escobar, MD, PhD
Department of Cardiology
Hospital Infanta Sofia
Madrid, Spain
Vivencio Barrios, MD, PhD
Department of Cardiology
Hospital Ramón y Cajal
Carretera de Colmenar Viejo km 9,100
28034, Madrid, Spain
vbarriosa@meditex.es
vbarrios.hrc@salud.madrid.org
Disclosures
The authors have no conflicts of interest to disclose.
References
1. Jamerson K, Weber MA, Bakris GL, et al. Benazepril plus amlodipine or
hydrochlorothiazide for hypertension in high-risk patients. N Engl J Med
2008;359:2417-28.
2. Telmisartan Randomised Assessment Study in ACE Intolerant Subjects
With Cardiovascular Disease (TRANSCEND) Investigators. Effects of the
angiotensin-receptor blocker telmisartan on cardiovascular events in high-
risk patients intolerant to angiotensin-converting enzyme inhibitors: a ran-
domised controlled trial. Lancet 2008;9644:1174-83.
3. Ogunyankin KO, Day AG. Successful treatment of hypertension accounts
for improvements in markers of diastolic function: a pilot study comparing
hydrochlorothiazide-based and amlodipine-based treatment strategies. Can
J Cardiol 2009;25:e406-12.
4. Sciarretta S, Palano F, Tocci G, Baldini R, Volpe M. Antihypertensive
treatment and development of heart failure in hypertension: a Bayesian
network meta-analysis of studies in patients with hypertension and high
cardiovascular risk. Arch Intern Med 2011;171:384-94.
doi:10.1016/j.cjca.2011.02.004
Canadian Journal of Cardiology 27 (2011) 524.e5 www.onlinecjc.ca
0828-282X/11/$ – see front matter © 2011 Canadian Cardiovascular Society. Published by Elsevier Inc. All rights reserved.