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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Coronary heart disease is the most frequent cause of death in Western, industrialized countries. Coronary risk factors are prevalent in such countries and sometimes combine to constitute the so-called syndrome X--hypertension, central obesity, serum lipid and clotting disturbances, and insulin resistance. beta-Blockers, unlike calcium antagonists, have proved highly effective in secondary prevention of myocardial infarction. If present at the time of the myocardial infarction, beta-blockers (unlike calcium antagonists and diuretics) probably decrease mortality 1 month later. Early intervention (within 12 h) of chest pain with intravenous beta-blockers results in a 15% reduction in cardiovascular mortality at 1 week. Later intervention (3-28 days) with oral non-ISA beta-blockers results in a 30% reduction in mortality after 1 year; ISA-containing beta-blockers are probably less effective (less decrease in heart rate). Hydrophilicity/lipophilicity of beta-blockers is unimportant in terms of decreased mortality. Primary prevention of myocardial infarction, unlike stroke, in hypertensive patients has been disappointing, possibly due to treatment-induced biochemical/lipid changes or inappropriate lowering of diastolic blood pressure in high-risk subjects (J-curve effect). beta-Blockers should be first-line therapy for hypertensive patients up to the age of 65 years, particularly men (and nonsmokers) as Q-wave myocardial infarction is significantly decreased by beta-blockers and significantly increased by diuretics. However, in elderly hypertensive subjects, beta-blockers have not significantly decreased myocardial infarction (unlike stroke), whereas diuretics have. The effects of beta-blockers and diuretics on heart size (and thus coronary flow reserve) in the elderly may be important. Thus, beta-blockers should be second-line therapy for the elderly hypertensive individual but first-line if overt ischemia (e.g., angina or recent myocardial infarction) also is present. In patients with angina but normal blood pressure, beta-blockers tend to decrease and calcium antagonists increase cardiovascular events. Thus, beta-blockers are highly effective agents in the secondary prevention of myocardial infarction and are moderately effective in primary prevention of myocardial infarction in hypertensive patients (particularly men) under the age of 65 years.
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PMID:Beta-blockers: primary and secondary prevention. 128 45

The spectrum of demands on an antihypertensive agent is constantly increasing. It is not only supposed to reduce blood pressure, but also to have a certain profile with regard to pathophysiology, hemodynamics, pharmacokinetics, safety, and clinical applicability. Carvedilol is a new beta-blocking agent without ISA, which causes vasodilation primarily through an alpha 1-blockade. It combines the positive effects of alpha 1- and beta-blockade; the negative properties are offset by each other. It not only provides theoretical advantages, but also shows a favourable hemodynamic profile and is effective and safe. Advantages in both primary and secondary prevention can be expected. It can be administered once daily, is well suited to patient needs, and can be combined with other hypertensive drugs. It also exerts a favorable influence on many secondary diseases. The compelling advantages of the drug make it an important addition to our armamentarium for the treatment of arterial hypertension as a first-line drug.
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PMID:Antihypertensive profile of carvedilol. 135 Apr 84

The authors summarize the principles of the therapeutic approach to the 5H syndrome [1. hyperinsulinism, 2. hyperglycaemia (NIDDM), 3. hyperlipoproteinaemia (obesity), 4. hypertension, 5. hirsutism], in particular its two components, i.e. NIDDM and arterial hypertension. The authors found that early treatment of hyperinsulinism, e.g. already in the stage of impaired glucose tolerance or NIDDM with oral antidiabetics, their disproportionate increase with regard to the blood sugar level and glycosylated haemoglobin without making "hygienic" provisions (radical weight reduction; increased physical activity to the maximum possible individual level; energy restricted diet in particular as regards carbohydrates and fat) does not prevent progression of the components of the 5H syndrome to the clinical stage. In treatment of arterial hypertension associated with 5H syndrome non-selective beta-blockers and thiazide diuretics are unsuitable because they worsen the HPLP and enhance insulin resistance. Suitable preparations are combinations of ACE-inhibitors, calcium antagonists, selective beta-blockers in particular with ISA and beta-blockers with a partial selective sympathomimetic activity (devalol and celiprolol). Hygienic provisions must be started in childhood, or when hyperinsulinism is detected.
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PMID:[How should we implement the basic principles of treatment of type 2 diabetes mellitus from the aspect of the hormono-metabolic syndrome X (5H)?]. 145 53

The authors investigated the effectiveness of treatment of hypertension by monotherapy with beta-blockers--bopindolol (a beta-blocker with a slightly expressed ISA) and metoprolol (cardioselective beta-blocker) in 86 subjects with mild and medium severe hypertension. The purpose of the work was to analyze the effectiveness of control of hypertension in relation to age and to compare groups of subjects under 40 years with patients above 60 years of age. Both investigated beta-blockers proved effective in 80% of subjects above 60 years in the control of hypertension; no serious side-effects were recorded.
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PMID:[Beta-blockers in the treatment of hypertension in elderly patients]. 167 77

The aim in treatment of hypertension is normalization of blood pressure. The impact of treatment of hypertension on the development of IHD depends not only on the treatment of hypertension but also on influencing other basic risk factors, i.e. hyperlipoproteinaemia and smoking. Treatment of hypertension can be and should be individual and depends on a) age, b) the level of hypertension, c) complications of hypertension and d) the presence of other diseases, in particular hyperlipoproteinaemia and diabetes mellitus. The treatment of choice in hyperlipoproteinaemia are calcium antagonists, prazosin, ACE inhibitors and beta-blockers with ISA. There is experimental evidence suggesting that calcium antagonists (in particular isradipine) but also beta-blockers suppress the progression of atherosclerosis and AGE inhibitors prevent the development of cardiac and vascular hypertrophy. Effective treatment leads to a decline in the mortality from cerebrovascular attacks--in the USA in the course of 20 years a decline by 60%--in Czechoslovakia so far the mortality from cerebrovascular disease did not change which indicates unfortunately a very poor control of hypertension in the population.
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PMID:[Treatment of hypertension and cardiovascular complications]. 182 87

The aim of this study was to compare the effects of long-term monotherapy with five different beta-blockers on plasma lipids in patients with essential hypertension. We studied 99 male patients, aged 35-55 years, with mild to moderate hypertension, who worked in the same community. After a 1-month placebo period, patients were assigned to receive propranolol (160 mg/day), atenolol (100 mg/day), bisoprolol (10 mg/day), mepindolol (10 mg/day), or celiprolol (400 mg/day). Therapy was continued for 2 years. Blood pressure (BP), heart rate, and blood samples for evaluation of total cholesterol (TC), LDL-cholesterol (LDL-C), triglycerides (TG) and HDL-cholesterol (HDL-C) were taken before and after the initial placebo period, and subsequently every 6 months from the beginning of active treatment. All beta-blockers caused similar reductions in BP that were maintained throughout the study. None of the beta-blockers significantly affected TC or LDL-C. Propranolol, a nonselective beta-blocker, caused the most pronounced changes in TG (+33 to 43%) and in HDL-C (-30 to -32%). Atenolol, a beta 1-selective agent, had the same quantitative effects, but to a lesser extent (TG + 23 to 30%; HDL-C -15 to -19%). Bisoprolol, more beta 1-selective than atenolol, and mepindolol, nonselective with ISA, increased TG (+20 to 28% and +14 to 25%, respectively) but did not significantly affect HDL-C. In contrast, celiprolol, a highly cardioselective beta-blocker with beta 2-partial agonism, improved lipid risk factors by significantly reducing TG (-14 to -21%) and increasing HDL-C (+8 to 14%).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Plasma lipids during chronic antihypertensive therapy with different beta-blockers. 248 87

Effective treatment of chronic hypertension may be accompanied by a decrease, increase, or no change in the extent of LVH, depending on the pharmacologic properties of the antihypertensive agents employed. Unlike beta-adrenoceptor blockers without ISA, beta-adrenoceptor blockers with ISA have been reported to increase left ventricular mass despite favorable reductions in blood pressure. To assess further the potential effect of ISA on LVH, we retrospectively evaluated the effect of carteolol, a nonspecific beta-adrenoceptor antagonist with strong ISA, upon ECG evidence of LVH. In 12 patients with LVH, carteolol treatment for one year reduced mean arterial blood pressures from 120 +/- 2 mm Hg to 100 +/- 2 mm Hg and mean hypertrophy scores from 5.2 +/- 0.6 to 2.6 +/- 0.8. Therefore, ISA does not preclude the regression of ECG evidence of LVH during the treatment of hypertension.
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PMID:Carteolol, an antihypertensive beta-blocker with intrinsic sympathomimetic activity, reduces ECG evidence of left ventricular hypertrophy. 252 Dec 4

In 242 patients with hypertension and/or angina pectoris, a new cardioselective betablocker without ISA, bisoprolol (Concor), was tested. The average mean value of 168/102 mm Hg was lowered in the 174 hypertensive patients by a systolic value of 17 and a diastolic value of 11 mm Hg. A normal diastolic pressure of 95 mm Hg or below was attained within 4 weeks in 73% of patients. Angina pectoris improved from 7 attacks per week before treatment to 3 attacks after 2 weeks; patients with additional hypertension showed a further improvement after another two weeks to an average of 1.7 attacks per week. Side effects were most frequently dizziness, headache and fatigue and also a few patients with gastrointestinal symptoms, an unusual side effect with this treatment. The results show the effective antihypertensive and antianginal action of bisoprolol in a large group of outpatients.
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PMID:[A new beta 1-receptor blocker in the therapy of essential hypertension and angina pectoris]. 256 85

In summary it appears that beta 2-blockade does not lower high blood pressure. Beta 1-blockade seems to be the necessary feature for the antihypertensive effect. Beta 1 ISA may attenuate the blood pressure lowering efficacy. Finally beta 2 ISA causes a favourable hemodynamic pattern in which the blood pressure lowering occurs mainly through vasodilatation. The ideal beta-blocker for hypertension should cause beta 1-blockade. It should not cause beta 2-blockade and it should possess relatively pronounced beta 2 ISA.
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PMID:Pharmacological properties of beta-adrenoceptor blockers in relation to their antihypertensive effect. 285 41

1. Beta-Blockers are of similar efficacy in the treatment of hypertension to other antihypertensive drugs of first choice; they have a wide spectrum of activity both alone and in combination. 2. Although beta-blockers first appear to worsen the haemodynamic changes of hypertension, subsequently peripheral resistance falls. The cardiovascular reflexes responsible for the responses of posture or other responses requiring normal functioning of alpha-mediated tone are not inhibited. 3. Important contra-indications are asthma and heart failure in susceptible subjects. Lipid soluble drugs have somewhat greater CNS side effects. 4. Triglyceride levels, notably an increase in VLDL and a fall in HDL occur from non-selective agents (less so from beta 1-selective agents) and there is a marginal effect from drugs with relatively high ISA. 5. In contrast to other antihypertensive drugs beta-blockers reduce the myocardial infarction rate in high risk patients (i.e. post-myocardial infarct). Results in primary prevention of mild hypertension have been less promising. 6. Those drugs which are lipid soluble and liver metabolized result in greater variation of plasma concentration after oral administration and some pharmacokinetic drug interactions. Once daily administration is possible with many beta-blockers. 7. beta-Blocking drugs have an established and proven place in the treatment of hypertension.
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PMID:Risk-benefits of antihypertensive drugs--beta-blockers. 290 32


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