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

The histories of 117 patients with left axis deviation and complete right bundle branch block (rbbb) on the electrocardiogram were reviewed for evidence of clinical cardiac disease, hypertension or emphysema. One hundred fifty-four patients with complete right bundle branch block alone served as controls. The incidence of coronary artery disease (myocardial infarction or angina) was significantly greater in the group with pronounced left axis deviation; the other factors evaluated showed no significant difference between the two groups. Pronounced left axis deviation of the mean qrs axis is associated with a high prevalence of clinical coronary artery disease. The presence of complete right bundle branch block does not alter their relationship. Some patients with complete rbbb, or with rbbb and pronounced left axis deviation, have no clinical evidence of heart disease.
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PMID:The significance of pronounced left axis deviation in the presence of right bundle branch block. 577 97

We present 38 acromegalyc patients who were studied by non invasive methods to assess the frequency of cardiovascular complications. Seventy one percent of the cases presented some type of cardiovascular alteration. In 68% we observed left ventricular hypertrophy by echocardiography which was the most sensitive method to detect it. In 71% we obtained abnormal electrocardiograms, mainly because of conduction disturbances, being right bundle branch block the most frequent. Half of the cases had pulmonary fibrosis and chronic bronchitis. Arterial hypertension was present in 32%. Diabetes mellitus in 21%. Only 2 cases had coronary heart disease. In 37% of the patients who underwent hypophisectomy we observed regression up to 90% of the cardiac complications except for left ventricular hypertrophy and pulmonary fibrosis. None of the patients has died.
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PMID:[Cardiovascular changes in acromegaly. Prospective study]. 623 87

Four hundred seventy-five patients underwent repair of tetralogy of Fallot from 1955 to 1964; 396 of these were hospital survivors and were followed up for 12 to 22 years. An excellent late clinical result was maintained by 87 percent of the 396 hospital survivors. A less than excellent result in the remaining 13 percent of hospital survivors was caused by late mortality in 7 percent (sudden death in 3 percent, death due to cardiac causes in 2 percnt and death due to noncardiac causes in 2 percent), required reoperation in 4 percent (mainly because of residual ventricular septal defect) and development of symptoms in 2 percent. Postoperative cardiomegaly (cardiothoracic ratio greater than 0.55) was observed in 60 (25 percent) of 246 patients who had a follow-up chest roentgenogram, and was more common among those who died late or remained symptomatic. Among the few patients with inadequate surgical relief of right ventricular hypertension who did not have transanular patch repair, the hypertension did not tend to decrease progressively, whereas it did decrease in patients who had patch repair. No late sudden deaths were encountered in 20 patients shown to have postoperative right bundle branch block plus left axis deviation (bifascicular block pattern). Pulmonary valve incompetence appeared to have relatively little harmful influence on the late result, causng cardiac disability in 1 percent of the patients and appeared to be the main contributing factor of postoperative cardiomegaly in 13 (5 percent) of the 246 patients who had a follow-up chest roentgenogram. Most late deaths and complicatins appeared within 2 years of operation, and accelerating deterioration in late results did not occur as the follow-up extended beyond 2 decades.
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PMID:Long-term evaluation (12 to 22 years) of open heart surgery for tetralogy of Fallot. 644 95

Cardiovascular abnormalities were prospectively identified in all 55 persons who acquired left bundle branch block and all 70 persons who acquired right bundle branch block during 18 years of follow-up of the Framingham Study cohort. Those with left and right bundle branch block did not differ from each other in the overall prevalence of either hypertension, clinical coronary disease or diabetes. In men, but not in women, left bundle branch block was associated with a significantly greater prevalence of cardiac enlargement and congestive failure than was right bundle branch block. A trend suggesting a higher mortality rate from cardiovascular disease in those with left than in those with right bundle branch block was more apparent in men than in women. It is concluded that in the general adult population, men who acquire left bundle branch block are more likely to have or subsequently acquire advanced cardiovascular abnormalities than are men who acquire right bundle branch block. In women, however, the clinical correlates of the two conduction abnormalities are similar.
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PMID:Comparative features of newly acquired left and right bundle branch block in the general population: the Framingham study. 645 50

Of 1,164 (= 89.7%) of all diabetics established in the district department for diabetes Prenzlau the electrocardiograms in rest were evaluated and the frequency of hypertension, adiposity and left hypertrophy in the photofluorogram were registered. Altogether only 13% of all patients with an average age of 65 years had a normal ECG. In comparisons to the population with healthy metabolism the frequency of hypertension *84.0%), adiposity (62.7%) and in the ECG of repolarization disturbances (68.9%), myocardial infarction (6.4%), atrioventricular blockings (16.9%), absolute arrhythmia (4.4%), tachycardia (5.5%), a left hypertrophy (18.2%; in the photofluorogram 52.3%), of forms of bundle branch blocks (9.1% left-anterior hemiblock, 4.5% right bundle branch block and 3.1% left bundle branch block) and of an overturned left type (13.1%) were evident in diabetics. Pathological changes of the ECG could be proved no more infrequently in females with diabetes than in males with diabetes. The connection between the appearance of a coronary arteriosclerosis and the intake of tolbutamide supposed by the UGDP-study could be confirmed also for the intake of glibenclamide.
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PMID:[Incidence of pathological ECG findings, hypertension and obesity in diabetic patients depending on their mode of therapy]. 645 56

The prevalence of right bundle branch block (RBBB) according to clinical findings was investigated in 4210 randomly selected subjects of both sexes, aged 35 to 54, in 1969 and after a period of three years (1972). Rheumatic heart disease and decreased forced vital capacity were more often found in persons with RBBB than in persons without RBBB. The prevalence of RBBB was 0.24% in 1969 and 0.35% in 1972. Incomplete RBBB (iRBBB) was found in 2.95% in 1969 and in 1.64% in 1972. The R1 smaller than the R wave in V1 or V2 was seen in 3.37% in 1969 and in 2.72% in 1972. RBBB remained constant over a period of three years, iRBBB was constant in 40.8% and R1 smaller than the R wave in V1/V2 was constant in 34.8%. Hypertension and depression of the S-T segment and inverted T wave before and after exercise were not more frequent in subjects with RBBB than in those without RBBB.
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PMID:Right bundle branch block in a prospective population study. 661 10

A total of 14,500 E.C.G. tracings were reviewed to determine the incidence of bifascicular block and those patients were followed up to assess prognosis. Forty patients with bifascicular block (complete right bundle branch block associated with left anterior hemiblock), diagnosed with standard E.C.G., according to Medrano's criteria from January 1978 to September 1980 were studied in our Service. The incidence of this intraventricular conduction defect was 0.0033 (3.3 per thousand). Males predominated over females at a rate of 2.4 to 1. This block was more frequent from the sixth to the ninth decades of life. Thirty five percent of the patients had no evidence of cardiovascular pathology; 32.5 percent had high blood pressure, 2.5 percent had coronary heart disease, 2.5 percent rheumatic heart disease, 5 percent chronic pulmonale, and 37.5 percent had diabetes mellitus as an associated finding. During the follow up which covered 20.2 months/patient, only one patient developed junctional rhythm and periods of asystolia and syncope; this case was treated with a permanent pacemaker with good results. Two patients died, one from digitalis intoxication and the other at home, the cause was not determined. It is necessary to study this conduction defect with longer follow up periods and according to the underlying heart disease, in order to assess properly the prognosis and behavior of this conduction defect.
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PMID:[Bifascicular block: long-term follow-up. Report of 40 cases]. 708 98

Echocardiography was used to study the quantitative and qualitative alterations of pulmonary valve echograms. 228 infants and children with congenital heart disease and with known pulmonary artery pressure were studied to evaluate which echocardiographic parameters would be most useful in predicting pulmonary artery hypertension. Right ventricular systolic time intervals (RVSTI) were studied and when patients with complete right bundle branch block (CRBBB) or transposition of the great arteries (TGA) had been excluded the strongest correlation was found between right ventricular preejection period/right ventricular ejection time (RPEP/RVET) and pulmonary artery diastolic pressure (PADP) (r = 0.73). In patients with TGA the correlation coefficient for LPEP/LVET and PADP was r = 0.88. We did not find a significant correlation between right ventricular isovolumetric contraction time (RICT) or RICT/RVET and PADP in patients with CRBBB. The correlation between the amplitude of the a-wave and PADP was fair (r = 0.48). BC slope, EF slope and the maximum amplitude of opening of the pulmonary valve were all related to PADP but the correlation coefficients were low. A-wave of 2 mm or less, systolic fluttering or systolic notching of the pulmonary valve echo were seen significantly more often in patients with PADP above 20 mm Hg but were less valuable in predicting pulmonary artery hypertension. RVSTI seem to be more useful than the other echocardiographic parameters for evaluation of pulmonary artery hypertension and RPEP/RVET appears to be the most reliable of them.
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PMID:Echocardiographic estimation of pulmonary artery pressure in infants and children with congenital heart disease. 744 12

This study is based on the Reykjavik Study, a long-term prospective cardiovascular survey, which included a representative population of 9135 men and 9627 women, 33-79 years old, who were invited to participate during the years 1967-91. Right bundle branch block (RBBB) was found in 126 men and 67 women. The prevalence increased with age, from 0% among men and women 30-39 years of age to 4.1% and 1.6% in men and women, respectively, who where 75-79 years old. The incidence increased with age. In men younger than 60 years RBBB had a significant relationship with hypertension (P < 0.05), elevated fasting blood glucose (P = 0.05), and increased heart size (P < 0.05). In men with RBBB regardless of age, an association was found with cardiomegaly (P < 0.05), ischaemic heart disease (P < 0.05), arrhythmias (P < 0.001) and bradycardia (P < 0.01). A higher mortality from heart disease (P < 0.01) was found in men with RBBB compared to the control population. This was not significant when risk factors of heart disease were taken into account by multivariate Cox analysis. There was a relationship (P < 0.05) between hypertension and RBBB in women younger than 60 years. RBBB in women younger than 60 years is often associated with hypertension and in men younger than 60 it is often associated with an underlying cardiovascular disease, hypertension, cardiomegaly and elevated blood glucose.
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PMID:The epidemiology of right bundle branch block and its association with cardiovascular morbidity--the Reykjavik Study. 813 55

A traumatic left bundle branch block (LBBB) is uncommon in a patient with intact atrioventricular conduction. Three of our patients developed LBBB during a left-sided catheterization. Two patients suffered from angina pectoris and the other had an abdominal aneurysm. Two of them had a history of hypertension. None of the patients had ever shown any conduction abnormalities before the catheterization. The electrocardiogram just before the examination was normal in all 3 patients. LBBB was observed when a catheter was introduced into the left ventricle, and lasted 2--4 min without significant change in heart rates. Examination revealed no significant stenosis proximal to the first septal perforator and normal left ventricular contraction in all patients. One patient developed permanent LBBB 14 months later. Catheter-induced LBBB may occur easily with certain anatomical characteristics of the left bundle branch or the distal His bundle, with or without some concealed damage to the conduction system. It is important to keep this complication in mind and to pay adequate attention to patients' electrocardiograms as well as their angiographical findings, especially in those with pre-existing right bundle branch block.
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PMID:Transient left bundle branch block induced by left-sided cardiac catheterization in patients without pre-existing conduction abnormalities. 955 37


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