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

Cyclically fluctuating intracranial pressure (ICP) with periodic breathing was first described by Nils Lundberg in 1960. While Cheyne-Stokes respiration (CSR) frequently accompanies severe cerebrovascular accidents, it is not commonly appreciated that cycles of severe intracranial hypertension can complicate this abnormal ventilation pattern. We recently treated a patient with a hemorrhagic stroke in whom episodes of elevated ICP were synchronously associated with CSR.
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PMID:Fluctuating intracranial hypertension due to Cheyne-Stokes respiration. 55 16

Two cases of pure sensory stroke were studied pathologically 6 months and 4 years after the acute illness. In both, there were lacunar infarcts in the region of the sensory nucleus of the thalamus on the side opposite the symptoms. The responsible vascular lesion in each case was hypertensive lipohyalinotic cerebral angiopathy, a process that correlates with the presence of hypertension. This was the first time that a complete clinicopathologic investigation was possible in pure sensory stroke and also the first time a lipohyalinotic lesion was shown to be the cause of a specific clinical syndrome.
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PMID:Thalamic pure sensory stroke: a pathologic study. 56 33

This study confirmed again that high protein diet feeding decreased the incidence of stroke, and high fish protein diet did attenuate severe hypertension but high soybean protein diet did not affect the hypertension. Dietary amino acid analyses indicated that increases in total amino acids, essential amino acids and nonpolar amino acids but not acid or basic amino acids were significantly related to the reduction of stroke incidence. Among essential amino acids, lysine, threonine, isoleucine, and leucine contents were inversely related to stroke incidence, and methionine content was significantly related to the dietary antihypertensive effect of high protein diets. The prophylactic effect of high protein diets may be ascribed to some amino acid constituent.
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PMID:Prophylactic trials for stroke in stroke-prone SHR. (3) Amino acid analysis of various diets and their prophylactic effect. 56 25

A patient with intractable congestive cardiac failure secondary to renovascular hypertension and severe coronary artery disease was infused with the competitive antagonist of angiotensin II, saralasin acetate. The infusion produced an impressive increase in cardiac output and left ventricular stroke work index in parallel with a striking decrease in the systemic and pulmonary vascular resistance, the coronary resistance, and the myocardial oxygen consumption. It is suggested that angiotensin inhibition may present advantages over other forms of treatment of congestive cardiac failure in selected cases.
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PMID:Angiotensin II inhibition. Treatment of congestive cardiac failure in a high-renin hypertension. 57 78

Report on a 10 year-old boy with acute hemiplegia after an ischemic cerebrovascular accident, provoked by an unilateral renovascular disease with malignant hypertension, for which nephrectomy was carried out. The few publications pertinent to cerebrovascular complications in children with hypertension and the value of comprehensive diagnostic operations, are the basic motives for this report.
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PMID:Renovascular hypertension as a cause of cerebrovascular accident in childhood: a case report. 57 1

Spontaneous intracerebral haemorrhages are dealt with on the basis of a great number of clinical and neuropathological cases. They amounted to 4.9 per cent of the patients admitted to the hospital and 5.2 per cent of the autopsies. In two thirds hypertension was found about 20 per cent were ruptured aneurysms. In 3 per cent of the respective autopsies no cause was found. The clinical courses are dealt with in greater detail. Eighty per cent of the hypertensive haemorrhages are located in the cerebral hemisphere; among these, 60 to 80 per cent show ventricular perforations. This percentage is still higher in thalamus--brain stem haemorrhages. Two theories on the aetiology are discussed. Traumatic haemorrhages are especially dealt with in connection with late apoplexy. Deformations of the cerebral vessels, too, are described in detail. Among the aneurysms, 82 per cent belong to the circulus willisi. Angiomas were found in 15.2 per cent of the autopsies in case of cerebral haemorrhages, but in 58 per cent of the surgically treated intracerebral haemorrhages. These figures are higher than those given in the relevant literature. Among 1600 cerebral tumours, there were 2.2 per cent massive cerebral haemorrhages. The cases are compiled in a table.
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PMID:Pathology of intracerebral hemorrhage. 57 54

In 10 patients with arterial hypertension and left heart failure the hemodynamic effect of 14-hydroxy-3-beta-[4-O-methyl-alpha-L-rhamnopyranosyl)oxy]-14beta-bufa-4,20,22-trienolide (Ky 18, meproscillarin, Clift) was compared with placebo in a double-blind study. 15 min after oral administration of meproscillarin there was an increase of cardiac output and stroke volume by up to 25%. Heart rate, arterial blood pressure and left ventricular filling pressure remained unchanged.
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PMID:[Preliminary hemodynamic studies on the activity of meproscillarin (author's transl)]. 58 May 88

Cardiovascular, aerobic, and ventilatory responses to a multistage treadmill test of near-maximal exercise were determined in 208 middle-aged Chinese men to provide standards in health, and to identify differences in relation to hypertension, coronary heart disease, chronic pulmonary disease and stroke. Except in patients with hypertension, exercise duration was shortened and symptom-limited oxygen uptake was reduced in all disease groups. Unexpectedly, stroke patients exhibited lower heart rate responses to exercise than did patients with coronary heart disease.
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PMID:Near-maximal exercise responses in health and disease in middle-aged Chinese men. 59 76

To date, there is little information available on stroke risk factors in a major ethnic minority such as Mexican-Americans (M-A) in the USA. Forty-three M-A patients were admitted to The Methodist Hospital and Ben Taub General Hospital (Houston) for a 12-month period, with diagnosis of atherosclerotic stroke. Thrombosis was diagnosed in 31 patients (72%), embolism from atherosclerotic sources in seven (16.4%), and parenchymal hemorrhage in five (11.6%). Hypertension was a common risk factor in all groups, being higher in hemorrhage followed by thrombosis and embolism. Arteriosclerotic heart disease was a common risk to all stroke types. TIAs, hyperlipidemia, diabetes, associated atherosclerotic lesions, smoking, obesity, erythrocytosis and sedentary life were significantly associated with embolism; less so with thrombosis or hemorrhage. Gout was only associated with thrombosis. These results indicate similar risk factors for Anglo-saxons and M-A in the USA with some minor differences between the Mexican and the USA stroke series.
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PMID:Risk factors in stroke in a Mexican-American population (Houston). 61 32

Angiotensin antagonists have proved useful in elucidating the clinical role of the renin-angiotensin system; and their diagnostic and therapeutic efficacy in hypertension has been the subject of many reports but the hemodynamic effects remain unknown. Therefore, saralasin was infused intravenously (1.3 mg/min for 30 min) in 26 sodium-depleted patients with hypertension. Systemic hemodynamic alterations were determined before, during, and after infusion. On the basis of mean arterial pressure (MAP) changes, patients were classified as responders, nonresponders, or pressorresponders (MAP changes greater than or equal to 10 mm Hg). MAP fall in responders was achieved through reduced cardiac output and/or total peripheral resistance, with minimal or absent reflexive heart rate increase. In nonresponders, despite no change in MAP, output fell in parallel with stroke index and left ventricular ejection rate, In pressorresponders, saralasin increased vascular resistance. Thus, in addition to variable effects on vascular receptors, saralasin produced inhibitory cardiac effects either through altered venous return or inhibition of contractility.
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PMID:Hemodynamic correlates of saralasin-induced arterial pressure changes. 61 29


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