Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0392680 (shortness of breath)
 5,217 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Analysis is presented of the relationship between decline in ventilatory function and possible symptoms of bronchial hyperreactivity. Data comes from three consecutive surveys within a 13-year follow-up study of a population sample of 1747 persons (718 males and 1029 females) who completed spirometric testing and interviews. Chest symptoms recorded in the two initial surveys were used as baselines for the prognostic study on FEV1 change. To evaluate changes in lung function the FEV1 decline index, expressed as percentage of FEV1 loss during the study period, was calculated. Chronic wheezing and asthma-like attacks were very strongly related to FEV1 baseline level. Multiple linear regression analysis for each separate symptom including age and smoking habits as confounders and showed that the FEV1 decline index was higher and more significant when wheezing and asthma-like attacks or chronic cough were present. When the combination of symptoms were introduced into the regression model, the effect of wheezing became insignificant. Only attacks of shortness of breath in both sexes and chronic cough in women were significantly associated with more rapid FEV1 decline. However, the effect of persistent wheezing in men had a rather substantial impact on FEV1 change. Comparing the effect of the number of cigarettes smoked with the effect of symptoms, one can see that FEV1 decline due to attacks of shortness of breath is comparable to that seen with heavy smoking. There was no strong evidence that the symptoms under study precede the more rapid FEV1 decline.
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PMID:Are chronic wheezing and asthma-like attacks related to FEV1 decline? The Cracow Study. 318 86

Airway reactivity is known to increase in relation to the severity of asthma, and, in the community, hyperreactivity has been shown to be associated with respiratory symptoms such as wheezing and shortness of breath. However, the relation between change in airway reactivity and change in the severity of respiratory symptoms and change in the use of asthma medications within subjects has not been studied. We have investigated this relationship in a community population. In September 1984 and March 1985, the provocative dose of histamine producing a 20% fall in FEV1 (PD20) was measured, and respiratory symptoms and medication use assessed by questionnaire in 78 subjects taking part in a study of seasonal changes in airway reactivity. On both occasions, PD20 was negatively correlated with current frequency of wheezing, with the amount of asthma medication in regular use, and with the current general assessment of breathing problems. In the 45 subjects who had a PD20 value of 8 mumol or less on at least one of the two occasions tested, PD20 increased between September and March by 0.46 (SEM, 0.32) doubling doses of histamine (p = 0.16). Within subjects, change in PD20 was negatively correlated with change in the frequency of wheezing in the past month (p less than 0.005) and with change in medication use (p less than 0.05). This study demonstrates that PD20 is related to the severity of respiratory symptoms and medication use, and that change in airway reactivity within subjects in a community population is associated with changes in the frequency of wheezing and in the use of asthma medication.
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PMID:The relation between change in airway reactivity and change in respiratory symptoms and medication in a community study. 320 8

Nifedipine, 30 mg/day for 4 weeks, was compared to placebo in a double-blind, randomized, crossover study, as an additional drug added to the usual treatment of 14 patients with bronchial asthma. Nifedipine did not significantly change peak expiratory flow rates or subjective symptoms like cough, sputum, wheezing, shortness of breath, or disturbed sleep. Nifedipine did not decrease the number of salbutamol rotacaps inhaled per day. Arterial blood pressure significantly decreased (p less than 0.01) after nifedipine treatment, and side effects (headache and flushing) were not uncommon. In this study, long-term treatment with nifedipine had essentially no effect on subjective symptoms at peak expiratory flow rates.
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PMID:Nifedipine treatment of patients with bronchial asthma. 329 78

The purpose of this study was to determine the shortest duration of exposure to 1.0 ppm sulfur dioxide (SO2) sufficient to induce bronchoconstriction significantly greater than that observed with exposure to clean air (CA) in exercising SO2-sensitive asthmatics. Asymptomatic, nonmedicated, male asthmatics (n = 12) with airway hyperresponsiveness to both methacholine and SO2 were exposed in a chamber (20 degrees C, 40% relative humidity) for 0.0, 0.5, 1.0, 2.0 and 5.0 min to both CA and 1.0 ppm SO2 on separate days (10 exposures). Just prior to each exposure, subjects walked on a treadmill in CA for 5 min at a predetermined speed/elevation to elicit a target ventilation of about 40 L/min, i.e., a brisk pace up a slight incline. After this walk, subjects rapidly entered an adjoining exposure chamber containing either CA or SO2 and immediately walked at the same speed/elevation for the specified exposure duration. Subjects then rapidly exited the chamber. Specific airway resistance (SRaw) and ratings of respiratory symptoms associated with asthma [shortness of breath/chest discomfort (SB/CD) and wheezing (WHZ)] were measured prior to any exercise and following each exposure. Postexposure SRaw and symptom ratings increased with increased exposure duration in SO2; postexposure SRaw also was increased with increased exposure duration in CA but to a lesser extent. After adjusting for the CA response, significantly greater SO2-induced bronchoconstriction was observed for the 2.0 and 5.0 min exposures as indicated by substantially greater increases in SRaw and substantially higher ratings of respiratory symptoms. The authors conclude that with the above exposure conditions, on average, SO2-sensitive asthmatics exhibit significant bronchoconstriction at exposure durations of 2.0 min or more.
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PMID:The relationship between exposure duration and sulfur dioxide-induced bronchoconstriction in asthmatic subjects. 334 75

Three patients addicted to cocaine in the form of "freebasing" were treated because of asthma. Patient no. 1 had very severe asthma while using the illicit drug. Patient no. 2's asthma became severe 2 months after she stopped this form of cocaine. Patient no. 3, who had asthma in childhood, developed cough and shortness of breath (but not wheezing) when he smoked the freebase but not while snorting. Freebasing may cause or contribute to asthma as a nonspecific irritant.
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PMID:Association of asthma and freebase smoking. 335 39

In Papua New Guinea a 15-year mortality follow-up was carried out among 2026 highlanders and 1734 coastal dwellers on whom data on respiratory symptoms and signs, and lung function had been obtained by prevalence surveys in 1970/71. Survival status was established in 99%, of whom 9.8% had died, the rate being higher in the highland (12.2%) than in the coastal population (7.0%). All abnormalities indicative of chronic lung disease were associated with increased mortality though this was statistically significant only for chronic shortness of breath (SMR 195) and wheezing (SMR 183) in coastal females. In those aged 25 years or more there was a strong association between reduced lung function (FEV1, FVC, FEV1/FVC%) and mortality, after controlling for age and height. The associations observed were as strong as those reported from prospective studies in developed countries. The most striking difference was that in Papua New Guinea mortality showed no association whatever with tobacco smoking; this may be because the traditional type of tobacco and method of smoking it resembles pipe/cigar smoking in developed countries.
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PMID:Prospective study of mortality associated with chronic lung disease and smoking in Papua New Guinea. 338 50

Infants with significant left-to-right shunts due to ventricular septal defects and atrioventricular canal defects commonly present with respiratory symptoms, such as shortness of breath while feeding, tachypnea, and wheezing. Radiographs show hyperinflated lungs as well as cardiomegaly and increased vascularity. Enlarged vessels adjacent to small compressible airways as well as peribronchial interstitial edema may cause diffuse air trapping. In this study, using an automated planimetric device, we measured the total thoracic, cardiomediastinal, and lung volumes in a group of patients with large left-to-right shunts as well as in a group of normal controls and found that, as expected, all volumes were significantly increased in the abnormal group. We also tried to correlate these volumes (corrected for patient size) with the degree of left-to-right shunt and found that there was no significant correlation between the cardiac or lung volumes and shunt size as estimated by cardiac catheterization.
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PMID:Hyperinflation of the lungs in infants with large left-to-right shunts. 338 15

The relation between the frequency of wheezing illness and IgE antibody levels against Dermatophagoides farinae (Df) and total IgE levels was examined in 457 randomly selected schoolchildren. From the response to the ATS-DLD-78-C respiratory symptoms questionnaire, 14 subjects (3.1%) were found to have asthma syndrome (recurrent episodes of attacks of shortness of breath with wheezing) and 17 subjects (3.7%), wheezing syndrome (only wheezing). The percentage of the asthma syndrome increased with increasing levels of Df-specific IgE, and there was an intimate correlation between the percentage of asthma syndrome and Df-specific IgE levels (r = 0.97; p less than 0.001), whereas such association was not found between the two (r = -0.19; p greater than 0.5). Similar relations were found between the frequencies of the specific syndromes and total IgE levels. There was a significant correlation between total IgE levels and Df-specific IgE levels in the total population (r = 0.7; p less than 0.001). These results suggest that allergic reaction greatly contributes to the development of asthma in children.
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PMID:Relation between frequency of asthma and IgE antibody levels against Dermatophagoides farinae and total serum IgE levels in schoolchildren. 339 74

In 1962 a cohort of 4604 Finnish men were interviewed about their smoking habits and cardiorespiratory symptoms. The cohort was followed up for deaths and incidence of lung cancer from 1963 to 1980 in order to study the effect of smoking and respiratory symptoms on the risk of lung cancer. The joint effect of smoking, age and respiratory symptoms on the risk of lung cancer was studied using a log-linear modelling technique. When analysed simultaneously with smoking, the symptoms of phlegm, shortness of breath and wheezing were all significantly associated with increased lung cancer risk. The joint effect of smoking and phlegm as well as that of smoking and wheezing was close to being multiplicative. Even if smoking is a causative factor in both these symptoms and in lung cancer, the symptoms seem to have a separate role as predictors of lung cancer risk.
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PMID:The joint effect of smoking and respiratory symptoms on risk of lung cancer. 344 Jun 61

Previous studies indicated that the prevalence of symptomatic asthma is about 4 to 7 percent. No similar studies exist to suggest the prevalence of asthma in highly trained competitive athletes, since asthma is thought to be an uncommon disease in this population. We became concerned, therefore, when a large number of football players developed symptoms consistent with asthma during preparation in California for the Rose Bowl in December 1981. We studied the team and found 12 percent of the football players admitted to a history of asthma, whereas none of the members of the university basketball team and 7 percent of a group of sophomore medical students and physician assistant students gave a history of asthma. Furthermore, 19 percent of the football players indicated that at some time they had chest tightness, cough, wheezing, or prolonged shortness of breath after exercise; 12 percent of the basketball players and 37 percent of the students indicated such a history. We examined each of these three groups for non-specific bronchial hyperresponsiveness to inhaled methacholine using a modified methacholine bronchoprovocation (MBP) challenge and found that 76 of 151 (50 percent) football players tested had positive tests; 76 percent of those with symptoms had positive results of inhalation tests and 47 percent of those with minimal or no symptoms had positive test results. In addition, four of 16 (25 percent) basketball players and 69 of 167 (41 percent) students had positive MBP tests. These studies indicate that bronchial hyperresponsiveness to inhaled methacholine is much more common in these young adults than has previously been suspected.
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PMID:Prevalence of bronchial hyperresponsiveness in highly trained athletes. 352 19


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