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Clinics (Sao Paulo). 2010 July; 65(7): 723–728.
PMCID: PMC2910862

Anti-Hypertensive Drugs Have Different Effects on Ventricular Hypertrophy Regression



There is a direct relationship between the regression of left ventricular hypertrophy (LVH) and a decreased risk of mortality. This investigation aimed to describe the effects of anti-hypertensive drugs on cardiac hypertrophy through a meta-analysis of the literature.


The Medline (via PubMed), Lilacs and Scielo databases were searched using the subject keywords cardiac hypertrophy, antihypertensive and mortality. We aimed to analyze the effect of anti-hypertensive drugs on ventricle hypertrophy.


The main drugs we described were enalapril, verapamil, nifedipine, indapamina, losartan, angiotensin-converting enzyme inhibitors and atenolol. These drugs are usually used in follow up programs, however, the studies we investigated used different protocols. Enalapril (angiotensin-converting enzyme inhibitor) and verapamil (Ca++ channel blocker) caused hypertrophy to regress in LVH rats. The effects of enalapril and nifedipine (Ca++ channel blocker) were similar. Indapamina (diuretic) had a stronger effect than enalapril, and losartan (angiotensin II receptor type 1 (AT1) receptor antagonist) produced better results than atenolol (selective β1 receptor antagonist) with respect to LVH regression.


The anti-hypertensive drugs induced various degrees of hypertrophic regression.

Keywords: Hypertrophy, Cardiomyopathy, Hypertrophic, Left ventricle hypertension, Cardiology


Cardiac hypertrophy consists of an increase in myocardial mass that results in persistent pressure and/or volume overload.1 In myocytes, hyperplasia is limited because of the cells’ differentiated profile, that most closely resembles a short period of time that ends immediately after birth.1 The high prevalence of ventricular dysfunction is used to support the view that the ability to regenerate after injury is not significant. However, research has shown that myocyte regeneration is fundamental to heart homeostasis.2 For instance, during aortic stenosis, the combination of hypertrophy and hyperplasia increases cardiac mass3 at specific locations, such as the site of a therapeutic stem cell implant.2

Remodeling manifests itself in almost all cardiac diseases and was initially considered beneficial because it compensates for the increased hemodynamic overload and ventricular wall stress and optimizes both function and energy expenditure.1 In some circumstances, remodeling is also considered to be an adaptive phenomenon that increases heart performance during work overload. This phenomenon is a result of protein synthesis and either the incorporation of new units into contractile myocytes or the addition of new sarcomeres.3 Nevertheless, the benefits of this process are limited by the rate of maintenance, which promotes deleterious changes characterizing this feature as uniquely unfavorable.4

The mechanisms leading to myocardial injuries59 and hypertrophy1012 during physiological or pathological states are different. For instance, the pathological hypertrophy results from the interaction of mechanical forces and neural and hormonal factors. Hemodynamic overload promotes myocyte stretch, the release of intracellular calcium, the activation of calcineurin and the induction of gene expression reprogramming.1 In athletes, left ventricular hypertrophy (LVH) is regarded as a physiological response that results from a hemodynamic overload; this physiological response does not result in the harmful effects of hypertension development or other heart diseases.1012 The literature explains physiological LVH as the result of a volume and pressure overload that results from intense physical training (the hemodynamic stimulus), which is not necessarily accompanied by neural and humoral changes.13

Despite some initial benefits of physiological hypertrophy, it is difficult to determine the time at which physiological hypertrophy becomes pathological1 and represents a significant morbidity and mortality risk. In other words, it is difficult to pinpoint exactly when, during the natural development of hypertension, cardiac hypertrophy raises an individual’s risk of experiencing a cardiovascular event by a reported factor of six to eight times.3

There are well-known associations between LVH and several conditions, such as obesity, diabetes, myocardial infarction and even mild elevation in blood pressure,1 as well as other cardiovascular risk factors that may be associated with increased cardiac mass regardless of ventricular pressure. Therefore, LVH is a powerful predictor of cardiovascular morbidity and mortality.3 Clinical and experimental studies have reported that several pharmacological, hemodynamic and non-hemodynamic factors are able to induce, reverse and prevent LVH,1416 interstitial fibrosis17 and the progression of atherosclerotic effects on myocytes.18 Clinically, cardiac hypertrophy is associated with increased adverse events, including stroke, chronic renal failure, ventricular dysfunction, ventricular arrhythmias and sudden death.3 Cardiac hypertrophy is also associated with a higher prevalence of coronary disease and is related to endothelial dysfunction. This dysfunction may lead to myocardial ischemia, even in the absence of epicardial artery obstruction, by reducing coronary flow reserves due to various hemodynamic factors, such as a minimal reduction in coronary resistance, systolic coronary perivascular compression, collagen deposition, fibrosis and a lower production of local vasodilator substances, such as nitric oxide.19

After adjusting for other risk factors, Koren and coworkers20 reported a positive relationship between ventricular mass and geometry with the morbidity and mortality of patients who did not have complicated hypertension.20 The Framingham Heart Study, published by Levy et al21 included 3,220 healthy subjects aged 40 years or older. This study demonstrated that estimating left ventricular mass by echocardiography can provide prognostic information about cardiovascular risk and can predict negative cardiovascular-related clinical events, including death.21 Moreover, LVH increased the risk of major cardiovascular events in 40% of the patients enrolled in the study.21

From these previous investigations, we infer that LVH constitutes an ominous risk factor for cardiovascular disease and that the magnitude of this risk is directly related to morbidity and mortality rates. Therefore, in this study, we endeavored to describe the effects of anti-hypertensive drugs on cardiac hypertrophy by a meta-analysis of previous studies.


The Medline (via PubMed), Lilacs and Scielo databases were searched using the following subject keywords: “cardiac hypertrophy,” “antihypertensive” and “mortality.” We also used the “related articles” function on PubMed, Lilacs and Scielo, which allowed us to search the references of the studies that were retrieved during our search. Publications were included in our review if either their titles or abstracts were available in English or Portuguese and suggested any effect (i.e., beneficial or malefic) or lack thereof from an anti-hypertensive treatment on cardiac hypertrophy. The review was completed in March, 2010. Publications were excluded if the treatment was limited to a particular technique or if the population received only one specific procedure (drug treatment) associated with a disease state or an age group. Other studies on anti-hypertensive treatment for hypertensive patients that offered additional relevant information found in the same database were also examined. Each publication was reviewed to identify the author(s), study period and data source, which influenced us to include the reference in the study.


A total of 694 manuscripts met the inclusion criteria for our study. We excluded investigations in which treatment was limited to a particular method and those studies in which the study population was limited to patients who were undergoing a particular procedure or an associated disease state.

In Table 1, we summarize studies that evaluated the relationship between anti-hypertensive drugs and cardiac hypertrophy. The investigations included in Table 1 demonstrate the relevance of angiotensin-converting enzyme (ACE) inhibitors14,15,2224 and angiotensin antagonist25 treatment for cardiac hypertrophy regression.

Table 1
A summary of the main clinical and experimental studies for anti-hypertensive drugs and left ventricular hypertrophy (LVH).


Regression of left ventricular hypertrophy

The high prevalence of LVH and the high rate of complications of its condition necessitate a thorough understanding of the mechanisms involved in its etiology and development, as well as the importance of prevention and regression, to optimize and prevent the deleterious consequences. Thus, it is important to clarify the following issues, which are described below.

Relationship between LVH regression and cardiovascular morbidity and mortality

Several published reports have provided data indicating that anti-hypertensive drugs promote ventricular hypertrophy regression and myocardial repair. In particular, ACE inhibitors have shown promising cardio-protective effects in experimental models of hypertensive heart disease;22 specifically, these inhibitors improve micro-vascular ischemia, ventricular function and arrhythmias.1416, 2329 We have previously reported that enalapril14 (ACE inhibitor) and verapamil23 (Ca++ channel blocker) provide the same cardio-protector response in an isoproterenol-induced LVH model in rats.28

To evaluate the effects of LVH and its regression, a previous study evaluated 151 patients with hypertension and LVH progression detected by echocardiography. The patients were followed for an average of 10 years+1.4 years, and the researchers noted a decrease in the non-fatal events rate following reduction of LVH, even after correcting for other risk factors. Conversely, the occurrence of these events increased when cardiac hypertrophy increased or remained stable.23

Another clinical investigation examined 430 patients with essential hypertension (also called primary or idiopathic hypertension) and related changes in the left ventricular mass with the occurrence of cardiovascular events. Treatments consisted of medication and lifestyle changes. At the 2 years and 9 months follow-up assessment, the prevalence of LVH by echocardiography was 26% per year, and the rate of cardiovascular events was 3.9% per year. For individuals who showed an improvement in LVH, the rate of cardiovascular events was 1.58 events per 100 patients per year. In the groups that experienced no change or a worsening in LVH, the rate of cardiovascular events was 6.27 events per 100 patients per year. These researchers also noted that this association did not depend on the initial ventricular mass, clinical parameters or monitored baseline blood pressure. Their final conclusion was that for primary hypertension, the decrease in ventricular mass during treatment is a favorable prognostic marker for subsequent morbid events.

Relationship between anti-hypertensive drugs and LVH regression

With the exception of minoxidil and hydralazine, which are peripheral vasodilators, the other anti-hypertensive drugs provided full or partial LVH regression.28 Not all classification, prospective and randomized studies that have evaluated the effectiveness of various drugs with respect to left ventricular mass reduction have reported evidence of a difference between their effects on LVH regression.23 However, in view of the different effects of the drugs, those drugs that depend on neural and humoral mechanisms, especially as reported in monotherapy studies, provide evidence that there may be several ways in which the drugs’ properties could reduce ventricular mass. In the literature, there are few monotherapy treatment meta-analyses. In addition, different groups report contradictory results.23 Most studies have used anti-hypertensive drugs (i.e., beta-blockers and diuretics) and reported 5–8% reductions of the left ventricular mass, while the use of ACE inhibitors and angiotensin AT1 blockers resulted in a 13% reduction. The difference between different anti-hypertensive drugs regarding their ability to reverse LVH may be determined by neural and humoral factors.30

Because LVH regression is an important intermediate objective of anti-hypertensive therapy, several trials and meta-analyses have compared the effects of these drugs on ventricular hypertrophy, but the usefulness of these studies is limited due to inadequate designs and methodological problems.32 The PRESERVE (Prospective Randomized Enalapril Study Evaluating Regression of Ventricular Enlargement),33 LIVE (Indapamide Sustained Release Versus Enalapril)34 and LIFE (Losartan Intervention for Endpoint in Hypertension)25 studies represent a new generation of well-planned trials comparing different anti-hypertensive drugs. These investigations revealed that during regression of LVH, the effects of nifedipine and enalaprilat are similar (PRESERVE); indapamine has a stronger effect than does enalapril (LIVE); and losartan treatment has a stronger effect than atenolol (LIFE).

The findings of these three studies conflict with the findings of some previous meta-analyses, and as such, these researchers have suggested that the effects of anti-hypertensive drug must be evaluated individually on their important intermediate targets, such as LVH, with appropriate patient populations. The extrapolation of the LVH regression effects based on the anti-hypertensive drug classification may lead to clinical mistakes and needs to be carefully reconsidered.23

Mechanisms besides the decreased hemodynamic overload that may be responsible for LVH regression

A decrease in blood pressure may reduce a ventricular mass. In addition to clinical studies, experimental studies have demonstrated that LVH prevention and/or regression is independent of blood pressure. For instance, our group investigated isoproterenol-induced LVH in albino rats, which typically leads to hypertrophy without an increase in the after-load, and reported LVH regression by gavage administration of enalapril15, 16, 28, 31 and verapamil.23, 30

Moreover, studies in spontaneously hypertensive rats, a rat strain commonly used in our laboratory3539, demonstrated that although various anti-hypertensive drugs may control systemic hypertension, LVH may be influenced by many, but not all, anti-hypertensive agents. Alpha-methyldopa, captopril, beta-blockers and calcium channel blockers promote the regression of hypertrophy, while other drugs, such as hydralazine and minoxidil, reduce blood pressure without influencing ventricular hypertrophy.23

However, the development of LVH in arterial hypertension may be explained primarily by an increased pressure overload and ventricular wall tension. The ratio of ventricular mass to pressure is often weak, even in relation to blood pressure monitored every 24 hours.3 Notably, LVH may occur independently from changes in arterial pressure and be present even when hypertension does not develop.1 We may include the presence of others factors involved in this condition, such as lifestyle, anthropometric and demographic characteristics, genetic influences and neural and humoral factors.24

Furthermore, in vivo, in vitro and genetic studies indicate that LVH development and its regression depends not only on the hemodynamic overload but also on other genetic, neural and humoral factors.9 Humoral agents that may affect mitogenesis and non-myocyte cardiomyocytes have been identified; these agents include the renin-angiotensin system, local norepinephrine, endothelin, transforming growth factor, insulin-like growth factor, bradykinin, prostaglandins and nitric oxide.23 The direct relationship between high blood pressure and LVH development has been questioned due to the fact that LVH development and its regression depends not only on the hemodynamic overload, forcing a review of the mechanisms involved in LVH development, such as the role of the sympathetic nervous system, the renin-angiotensin system, genetic factors, endothelin and endothelium.1 It is important to remember that the pathogenesis of LVH includes angiotensin II receptors and membrane-stretched cardiomyocytes.2

Several publications have reported that although anti-hypertensive drugs show non-uniform effects on LVH, there are no concomitant proportional decreases in blood pressure.13, 20 Conversely, anti-hypertensive drugs have promoted different effects on LVH, despite inducing similar reductions in blood pressure.4 Those assumptions lead us to consider other mechanisms involved in LVH regression that are independent of blood pressure reduction.

Intrinsic properties of anti-hypertensives on LVH regression: beyond blood pressure?

A decrease in cardiac mass may not depend only on daily arterial pressure measurement.23 Recently, Mayos et al.40 localized chromosome regions that harbor genetic variants that affect the diversity of electrocardiographic and echocardiographic LVH. They evaluated the genetic association of the Sokolow-Lyon voltage index and the Cornell product index, the septal thickness and the ventricular wall, ventricular dimensions and left ventricular mass in 868 members of 224 British households, all items were evaluated n pairs and together. Chromosomes 10, 12 and 17 were the genetic loci involved and had the most important influence on LVH, as detected by the electrocardiogram.23

Genetic factors may explain a substantial portion of the quantitative variability in the electrocardiographic and echocardiographic examinations due to hemodynamic and/or hormonal factors. However, the quantitative differences in LVH, known as phenotypes, may also be the result of individual differences besides those produced by the various anti-hypertensive drugs (i.e., beyond blood pressure).


LVH is an important marker of poor prognosis. Current medical literature shows the direct relationship between LVH and mortality, as well as the relationship between LVH regression and decreasing mortality. The literature also provides evidence for hypertrophic variations in response to the effect of different anti-hypertensive drugs and differences in the hemodynamic patterns.


Our studies received financial support from NEPAS (Núcleo de Estudos, Pesquisas e Assessoria à Saúde da Faculdade de Medicina do ABC), Capes (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), and FAPESP (Fundação de Amparo a Pesquisa do Estado de São Paulo).


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