AtenololBevantololMetoprololPropranololInterbeat interval: Interbeat interval is a scientific term used in the study of the mammalian heart.BetaxololLidanserin: Lidanserin (INN; ZK-33,839) is a drug which acts as a combined 5-HT2A and α1-adrenergic receptor antagonist. It was developed as an antihypertensive agent but was never marketed.PindololPlacebo-controlled study: Placebo-controlled studies are a way of testing a medical therapy in which, in addition to a group of subjects that receives the treatment to be evaluated, a separate control group receives a sham "placebo" treatment which is specifically designed to have no real effect. Placebos are most commonly used in blinded trials, where subjects do not know whether they are receiving real or placebo treatment.HypertensionAortic pressure: Central aortic blood pressure (CAP or CASP) is the blood pressure at the root of aorta. Studies have shown the importance of central aortic pressure and its implications in assessing the efficacy of antihypertensive treatment with respect to cardiovascular risk factors.BendroflumethiazideLosartan/hydrochlorothiazide: Losartan/hydrochlorothiazide is a combination drug used as an antihypertensive, consisting of losartan (an angiotensin II receptor antagonist) and hydrochlorothiazide (a diuretic).Beta-adrenergic agonist: Beta-adrenergic agonists or Beta-agonists are medications that relax muscles of the airways, which widens the airways and results in easier breathing. They are a class of sympathomimetic agents which act upon the beta adrenoceptors.NifedipineCommunity-based clinical trial: Community-based clinical trials are clinical trials conducted directly through doctors and clinics rather than academic research facilities. They are designed to be administered through primary care physicians, community health centers and local outpatient facilities.NadololAmlodipineDoxazosinCombination therapy: Combination therapy or polytherapy is therapy that uses more than one medication or modality (versus monotherapy, which is any therapy taken alone). Typically, these terms refer to using multiple therapies to treat a single disease, and often all the therapies are pharmaceutical (although it can also involve non-medical therapy, such as the combination of medications and talk therapy to treat depression).Pulsus bigeminus: Pulsus bigeminus is a cardiovascular phenomenon characterized by groups of two heartbeats close together followed by a longer pause. The second pulse is weaker than the first.