RESUMEN
OBJECTIVES: We report on a large prospective, multicentre clinical investigation on inter- and intrapatient genetic variability for antimicrobial resistance of Helicobacter pylori. METHODS: Therapy-naive patients (n = 2004) who had undergone routine diagnostic gastroscopy were prospectively included from all geographic regions of Austria. Gastric biopsy samples were collected separately from antrum and corpus. Samples were analysed by histopathology and real-time PCR for genotypic resistance to clarithromycin and quinolones. Clinical and demographic information was analysed in relation to resistance patterns. RESULTS: H. pylori infection was detected in 514 (26%) of 2004 patients by histopathology and confirmed in 465 (90%) of 514 patients by real-time PCR. PCR results were discordant for antrum and corpus in 27 (5%) of 514 patients, indicating inhomogeneous infections. Clarithromycin resistance rates were 17% (77/448) and 19% (84/455), and quinolone resistance rates were 12% (37/310) and 10% (32/334) in antrum and corpus samples, respectively. Combination of test results per patient yielded resistance rates of 21% (98/465) and 13% (50/383) for clarithromycin and quinolones, respectively. Overall, infection with both sensitive and resistant H. pylori was detected in 65 (14%) of 465 patients. CONCLUSIONS: Anatomically inhomogeneous infection with different, multiple H. pylori strains is common. Prospective clinical study design, collection of samples from multiple sites and microbiologic methods that allow the detection of coinfections are mandatory for collection of reliable data on antimicrobial resistance patterns in representative patient populations. (ClinicalTrials.gov identifier: NCT02925091).
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Farmacorresistencia Bacteriana , Infecciones por Helicobacter/microbiología , Helicobacter pylori/efectos de los fármacos , Helicobacter pylori/genética , Adulto , Anciano , Anciano de 80 o más Años , Antibacterianos/farmacología , Austria , Biopsia , Claritromicina/farmacología , Femenino , Mucosa Gástrica/microbiología , Mucosa Gástrica/patología , Genes Bacterianos , Variación Genética , Helicobacter pylori/aislamiento & purificación , Histocitoquímica , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Quinolonas/farmacología , Reacción en Cadena en Tiempo Real de la Polimerasa , Adulto JovenRESUMEN
PURPOSE: Our aim was to evaluate the diagnostic accuracy of contrast-enhanced 64-MSCT coronary angiography (MSCT-CA) in patients with severe coronary calcification. MATERIALS AND METHODS: 110 patients with an Agatston score > 400 were included in this retrospective analysis. Each patient underwent both conventional coronary angiography and MSCT-CA. No patient was excluded from the study because of coronary artery bypass grafting or coronary stenting. The results of MSCT-CA were compared with those of conventional coronary angiography and the diagnostic accuracy for detecting a hemodynamically significant stenosis was determined for coronary segments, vessels and patients. RESULTS: The average Agatston score for the study population was 1368 ± 1105. At least one significant stenosis was detected in 97 patients (88%) during conventional coronary angiography defining the gold standard. The sensitivity, specificity, positive and negative predictive values of MSCT-CA for detecting a significant stenosis were 54%, 83%, 52% and 85% for coronary segments (n = 1384), 80%, 70%, 74% and 77% for coronary vessels (n = 440), and 100%, 31%, 92% and 100% for patients (n = 110), respectively. No significant correlation could be observed between the degree of coronary calcification and the number of misclassified coronary segments. CONCLUSION: Artifacts caused by severe coronary calcification decrease the diagnostic accuracy of MSCT-CA. Performing MSCT-CA in patients with an Agatston score > 400 with the drawbacks of contrast media application and radiation exposure should be critically questioned and this decision should be made on an individual basis.
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Calcinosis/diagnóstico por imagen , Medios de Contraste , Angiografía Coronaria/métodos , Enfermedad de la Arteria Coronaria/diagnóstico por imagen , Estenosis Coronaria/diagnóstico por imagen , Procesamiento de Imagen Asistido por Computador/métodos , Yohexol , Tomografía Computarizada Multidetector/métodos , Ácidos Triyodobenzoicos , Anciano , Anciano de 80 o más Años , Artefactos , Técnicas de Imagen Sincronizada Cardíacas , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Sensibilidad y EspecificidadRESUMEN
Published data on the association between paraoxonase1 (PON1) polymorphisms and coronary heart disease (CHD) have yielded controversial results. The objective of this study was to determine the possible relationship between the two human PON1 amino acid variants, the Leu55Met and the Gln192Arg polymorphism, and the risk of CHD in a community-dwelling cohort of European ancestry. PON1 genotypes of 152 women and 151 men out of 1,998 randomly selected individuals aged 44-75 years were determined by polymerase chain reaction-based restriction enzyme digestion. Study participants underwent cardiological examination including a structured clinical interview, resting ECG, exercise testing and echocardiography. The diagnosis of CHD was based on history and/or appropriate findings during cardiac examination. Evidence for CHD was found in 43 (14.2%) study participants. The Leu/Leu (LL), Leu/Met (LM) and Met/Met (MM) genotypes at position 55 were noted in 131 (43.2%), 128 (42.2%) and 44 (14.5%) subjects; the Gln/Gln (QQ), Gln/Arg (QR) and Arg/Arg (RR) genotypes at codon 192 occurred in 167 (55.1%), 118 (38.9%) and 18 (5.9%) individuals, respectively. Homozygosity for the 55L-allele was significantly associated with CHD (p = 0.02), while the Gln192Arg polymorphism had no effect (p = 0.16). Logistic regression analysis demonstrated age (odds ratio 1.06/year), smoking (odds ratio 2.86), HDL cholesterol (odds ratio 0.94/mg/dl) and the paraoxonase LL genotype (odds ratio 2.25) to be significant predictors of CHD. These data suggest that the paraoxonase LL genotype at position 55 may present a risk factor for CHD.
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Enfermedad Coronaria/genética , Esterasas/genética , Polimorfismo Genético/genética , Adulto , Factores de Edad , Anciano , Alelos , Arildialquilfosfatasa , Austria/epidemiología , HDL-Colesterol/genética , Codón/genética , Estudios de Cohortes , Servicios de Salud Comunitaria , Enfermedad Coronaria/epidemiología , Estudios Transversales , Femenino , Frecuencia de los Genes/genética , Marcadores Genéticos/genética , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Fumar/genéticaRESUMEN
PURPOSE: To determine the potential of mesoporphyrin- and gadopentetate dimeglumine-enhanced and functional magnetic resonance (MR) imaging in the assessment of the acute effect of nicorandil on ischemic injury of the myocardium. MATERIALS AND METHODS: Spin-echo MR imaging was used to monitor changes in myocardial contrast and function in reperfused myocardial injury. Inversion-recovery echo-planar MR imaging was used to depict the injured region. Myocardial injury in rats was produced by using 30 minutes of coronary occlusion followed by 24 hours reperfusion. Nicorandil (n = 9) was infused during occlusion and early reperfusion. Control animals (n = 11) received no therapy. At 24 hours, after administration of mesoporphyrin and gadopentetate dimeglumine and histochemical staining, the function and size of the injured region of the left ventricle (LV) were determined. A t test was used to compare data between groups of animals, whereas regression and Bland-Altman analyses were used to determine correlation and agreement between MR imaging and histomorphometry, respectively. RESULTS: Treated animals showed reduced infarction size as compared with the control group from 25.6% +/- 7.9 (SD) to 7.9% +/- 6.8 of LV myocardial area (P < .001), as defined with mesoporphyrin-enhanced MR imaging; while the size of the rim increased from 10.8% +/- 10.0 to 16.1% +/- 14.4 (P < .05). The diastolic-midventricular cavity area was smaller in treated animals (15.2 mm(2) +/- 4.3) compared with the control group (28.5 mm(2) +/- 7.9; P < .001). At functional MR imaging, nicorandil improved systolic reduction in LV cavity area (57.5% +/- 17.3) compared with the control group (38.0% +/- 16.0; P < .05) and preserved regional LV wall thickening at the site of injury (12.2% +/- 11.1 in treated group vs 0.3% +/- 8.6 in the control group; P < .05). CONCLUSION: Contrast material-enhanced MR imaging has the potential to demonstrate reduction in size of ischemically injured myocardium, whereas functional MR imaging demonstrated the recovery of LV function 24 hours after nicorandil therapy.
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Medios de Contraste , Gadolinio DTPA , Imagen por Resonancia Magnética , Mesoporfirinas , Isquemia Miocárdica/diagnóstico , Nicorandil/uso terapéutico , Vasodilatadores/uso terapéutico , Animales , Imagen Eco-Planar , Infarto del Miocardio/diagnóstico , Infarto del Miocardio/patología , Isquemia Miocárdica/tratamiento farmacológico , Isquemia Miocárdica/patología , Isquemia Miocárdica/fisiopatología , Miocardio/patología , Ratas , Función Ventricular Izquierda/efectos de los fármacosRESUMEN
BACKGROUND: Electron-beam computed tomography-derived coronary calcium score correlates with the morphologic severity of coronary artery disease, reflecting both global atherosclerotic plaque formation and coronary artery luminal narrowing. The current study examines the impact of coronary atherosclerotic plaque burden, measured by coronary calcium score, on the potential for perioperative myocardial cell injury, as assessed by cardiac troponin T elevations in patients undergoing elective vascular surgery. The authors further investigated whether perioperative myocardial cell injury in those patients adversely affects noninvasive measures of left ventricular systolic function, such as ejection fraction and wall motion score. METHODS: Fifty-one consecutive patients scheduled for vascular surgery were enrolled in this prospective study. In addition to standard preoperative evaluation, including patient history and physical examination, electron-beam computed tomography scan, 12-lead electrocardiography, and transthoracic echocardiography were performed on the day before surgery. Subsequent evaluations on postoperative days 2 and 7 included transthoracic echocardiography and 12-lead electrocardiography. Cardiac troponin T determinations were performed on the day before surgery, immediately preoperatively, and on postoperative days 1, 2, 3, and 7. RESULTS: The median coronary calcium score of the 51 patients was 997.0 (25th percentile, 202.5; 75th percentile, 1,949.5). Cardiac troponin T elevations exclusively occurred in patients with a coronary calcium score greater than 1,000. The six patients (12%) with perioperative cardiac troponin T elevations had a 2.5-fold higher coronary calcium score than those without cardiac troponin T elevation (P = 0.021). In these patients, the ejection fraction decreased from 61 +/- 10% to 52 +/- 13% (mean +/- SD) on postoperative day 2 and was 54 +/- 16% on postoperative day 7 (P = 0.022). CONCLUSION: A high electron-beam computed tomography coronary calcium score, reflecting substantial coronary plaque burden, carries an increased risk for myocardial cell injury after vascular surgery. In these patients, myocardial damage may result in deterioration of global systolic left ventricular function.
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Calcinosis/complicaciones , Cardiomiopatías/etiología , Enfermedades Vasculares/cirugía , Anciano , Enfermedad de la Arteria Coronaria/complicaciones , Electrocardiografía , Femenino , Humanos , Cuidados Intraoperatorios , Complicaciones Intraoperatorias/etiología , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Tomografía Computarizada por Rayos X , Troponina T/metabolismoRESUMEN
BACKGROUND: Metoprolol is a beta(1)-selective beta-adrenergic antagonist while carvedilol is a non-selective beta-blocker with additional blockades of alpha(1)-adrenoceptors. Administration of metoprolol has been shown to cause up-regulation of beta-adrenoceptor density and to decrease nocturnal melatonin release, whereas carvedilol lacks these typical effects of beta-blocking drugs. AIMS: To compare beta-blocking effects of metoprolol and carvedilol when applied orally in healthy subjects. METHODS: We investigated the effects of single oral doses of clinically recommended amounts of metoprolol (50, 100 and 200 mg) and carvedilol (25, 50 and 100 mg) to those of a placebo in a randomised, double-blind, cross-over study in 12 healthy male volunteers. Two hours after oral administration of the drugs heart rate and blood pressure were measured at rest, after 10 min of exercise, and after 15 min of recovery. RESULTS: Metoprolol tended to decrease heart rate during exercise (-21%, -25% and -24%) to a greater extent than carvedilol (-16%, -16% and -18%). At rest, increasing doses of metoprolol caused decreasing heart rates (62, 60 and 58 beats/min) whereas increasing doses of carvedilol caused increasing heart rates (62, 66 and 69 beats/min), 50 and 100 mg carvedilol failed to differ significantly from the placebo (71 beats/min). CONCLUSIONS: We conclude that clinically recommended doses of carvedilol cause a clinically relevant beta-blockade in humans predominantly during exercise where it appears to be slightly (although not significantly) less effective than metoprolol. On the other hand, the effects of carvedilol on heart rate at rest appear rather weak, particularly in subjects with a low sympathetic tone. This might be caused by a reflex increase on sympathetic drive secondary to peripheral vasodilation resulting from the alpha-blocking effects of the drug. These results might be helpful in explaining why carvedilol, in contrast to metoprolol, may fail to cause up-regulation of beta-adrenoceptor density and does not decrease nocturnal melatonin release. This, in turn, may be a reason for the weak side-effects of carvedilol resulting from the beta-blockade. In addition, our data might be of interest in the interpretation of the forthcoming results of the COMET trial, although it has to be emphasised that they were derived from healthy subjects and, therefore, cannot be directly extrapolated to patients with heart failure.
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Antagonistas Adrenérgicos beta/administración & dosificación , Carbazoles/administración & dosificación , Metoprolol/administración & dosificación , Propanolaminas/administración & dosificación , Administración Oral , Adulto , Presión Sanguínea/efectos de los fármacos , Carvedilol , Estudios Cruzados , Método Doble Ciego , Prueba de Esfuerzo/métodos , Insuficiencia Cardíaca/tratamiento farmacológico , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Masculino , Persona de Mediana Edad , Valores de ReferenciaRESUMEN
The determination of myocardial viability is crucial in patients with left ventricular dysfunction resulting from acute myocardial ischemia or chronic coronary artery disease. Viable myocardium will most likely benefit from revascularization procedures. However, the revascularization of scar tissue will not lead to improvement of ventricularfunction andfurthermore bears unnecessary riskfor the patient. Currently, echocardiographic and radionuclide techniques are the most established methods for the assessment of presence and extent of viable myocardium. Magnetic resonance imaging (MRI) also provides multiple approaches for determining viability of acute ischemically injured and hibernating myocardium. MRI can assess contractile reserve in a manner similar to echocardiography. Additionally, contrast-enhanced MRI can characterize myocardial ischemic injury, including the ability to discriminate viable from nonviable zones. Several new contrast media have been introduced for this purpose. This review addresses the progress toward the goal of defining myocardial viability based on MR techniques and focuses on the current and future role of MR in the assessment of viable myocardium.
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Corazón/fisiopatología , Imagen por Resonancia Magnética/métodos , Infarto del Miocardio/fisiopatología , Aturdimiento Miocárdico/fisiopatología , Disfunción Ventricular Izquierda/fisiopatología , Membrana Celular/patología , Medios de Contraste , Humanos , Imagen por Resonancia Magnética/tendencias , Infarto del Miocardio/diagnóstico , Aturdimiento Miocárdico/diagnóstico , Miocardio/patología , Necrosis , Supervivencia Tisular , Disfunción Ventricular Izquierda/diagnósticoRESUMEN
OBJECTIVE: Oscillometric measurement of blood pressure at the wrist is becoming a widely used method for detection of hypertension and its control by treatment. The objective of the present study was to evaluate accuracy and suitability of wrist measurement in a clinical routine setting. PATIENTS AND METHODS: A series of 333 consecutive patients admitted to our cardiology outpatient clinic were included. Blood pressure was measured at both upper arms according to World Health Organization-International Society of Hypertension guidelines. Oscillometric measurement was performed at the contralateral wrist simultaneously. Blood pressure readings were taken by an oscillometric device applied at the wrist ('Klock'; Industrielle Entwicklung Medizintechnik, Stolberg, Germany) and a conventional mercury sphygmomanometer applied at the upper arm. RESULTS: Seventy-eight patients were excluded due to differences in blood pressure > 5 mmHg between both upper arms or due to 'error' messages of the wrist device. The data of the remaining 255 patients (149 males; mean age, 65 +/- 13 years; range, 18-95 years) are presented. Mean conventional blood pressure was significantly lower compared with the wrist device (137 +/- 20/80 +/- 11 mmHg versus 153 +/- 28/87 +/- 18 mmHg; P < 0.001 and P < 0.001). The mean difference was 16 +/- 25/6 +/- 17 mmHg. In clinical terms, differences in blood pressure exceeding +/-20/+/-10 mmHg reflecting classification of hypertension are considered important. Measurements of 101 (40%) patients were within these limits. Systolic readings of 110 (43%) and diastolic readings of 117 patients (46%) were beyond this scope. CONCLUSION: Due to low reliability of wrist blood pressure measurement, it cannot compete with the upper arm standard procedure. If ever, it should only be used if test readings in an individual comparing wrist and upper arm measurement show differences within a range of +/-20/+/-10 mmHg.
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Determinación de la Presión Sanguínea/instrumentación , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Presión Sanguínea/fisiología , Determinación de la Presión Sanguínea/métodos , Servicio de Cardiología en Hospital , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enfermeras y Enfermeros , Servicio Ambulatorio en Hospital , Muñeca/fisiologíaRESUMEN
Cardiovascular imaging requires an appreciation of rapidly evolving MR imaging sequences as well as careful utilization of intravascular, extracellular and intracellular MR contrast media. At the present time, clinical studies are restricted to the use of extracellular MR contrast media. MR imaging has the potential to noninvasively measure multiple parameters of the cardiovascular system in a single imaging session. Recent advances in fast and ultrafast MR imaging have considerably enhanced the capability of this technique, beyond the assessment of left ventricular wall motion and morphology into visualization of the coronary arteries and measurement of blood flow. During the course of the last several years, multiple strategies for imaging viable myocardium have been developed and validated using MR contrast media. Contrast enhanced dynamic MR imaging provides information regarding microvascular integrity and perfusion. Because these information can be provided noninvasively by MR imaging, repeated measurements can be performed in longitudinal studies to monitor the progression or regression of myocardial injury. Similar studies are needed to examine the effects of newly developed cardioprotective therapeutics. Development of suitable intravascular MR contrast medium may be essential for visualization of the coronary arteries and interventional therapies. MR imaging may emerge as one-stop-shop for evaluating the heart and coronary system. This capability will make MR imaging cost-effective in the first decade of this millennium.
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Medios de Contraste , Imagen por Resonancia Magnética/métodos , Isquemia Miocárdica/diagnóstico , Miocardio/patología , Angiografía Coronaria , Circulación Coronaria , Ecocardiografía , Humanos , Infarto del Miocardio/diagnóstico , Tomografía Computarizada de Emisión de Fotón ÚnicoAsunto(s)
Medios de Contraste , Enfermedad Coronaria/diagnóstico , Imagen por Resonancia Magnética/métodos , Infarto del Miocardio/diagnóstico , Angiografía Coronaria/métodos , Diagnóstico Diferencial , Humanos , Angiografía por Resonancia Magnética/métodos , Infarto del Miocardio/patología , NecrosisRESUMEN
OBJECTIVE: To investigate the diastolic Doppler filling pattern in patients with idiopathic dilated cardiomyopathy and its relation to N-terminal pro-atrial natriuretic peptide (NT-pro-ANP). METHODS: 32 patients (26 male, six female) with idiopathic dilated cardiomyopathy were investigated. All were in sinus rhythm. Conventional M mode echocardiography and Doppler echocardiography was done in each patient. Pulsed wave Doppler inflow signals were obtained and the following variables were measured: maximum E wave, maximum A wave, E/A ratio, E wave deceleration time, A wave deceleration time. NT-pro-ANP was measured using radioimmunoassay. RESULTS: Mean (SD) left ventricular ejection fraction was 34 (7)% and mean left ventricular end diastolic diameter on M mode echocardiography was 69 (7) mm. Left ventricular filling indices were as follows: maximum E wave velocity, 0.86 (0.22) m/s; maximum A wave velocity, 0.71 (0.24) m/s; E/A ratio, 1.41 (0.65). Mean E wave deceleration time was 140 (50) ms; mean A wave deceleration time was 100 (20) ms. In a stepwise forward regression model, NT-pro-ANP correlated significantly with left atrial diameter (r = 0.603; p < 0. 001), left ventricular ejection fraction (r = -0.758; p < 0.001), and Doppler derived E/A ratio (r = 0.740; p < 0.001). CONCLUSIONS: In patients with idiopathic dilated cardiomyopathy there is a relation between NT-pro-ANP and both systolic and diastolic variables. In a multivariate model NT-pro-ANP correlated with left atrial diameter, left ventricular ejection fraction, and Doppler derived E/A ratio on transmitral inflow.
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Factor Natriurético Atrial/sangre , Cardiomiopatía Dilatada/diagnóstico por imagen , Precursores de Proteínas/sangre , Disfunción Ventricular Izquierda/diagnóstico por imagen , Anciano , Biomarcadores/sangre , Cardiomiopatía Dilatada/sangre , Ecocardiografía Doppler de Pulso , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis de Regresión , Volumen Sistólico , Sístole , Disfunción Ventricular Izquierda/sangreRESUMEN
AIMS: The degree of systolic dysfunction does not always correlate with functional impairment in patients with congestive heart failure. In contrast, diastolic dysfunction correlates well with functional impairment. In heart failure, both elevation of N-terminal proatrial natriuretic peptide and B-type natriuretic peptide are markers of a poor prognosis. METHODS: We investigated 32 patients (26 male, 6 female; mean age 55+/-2 years) with dilated cardiomyopathy and sinus rhythm. M-mode echocardiography and 2D-echocardiography were carried out in each patient. Pulsed-wave Doppler inflow signals were obtained and the following parameters were measured: maximal E wave and maximal A wave velocity, E/A ratio, E wave deceleration time, A wave deceleration time. Immediately after echocardiography blood samples were collected from patients in the supine position. N-terminal proANP and brain natriuretic peptide were measured using a radioimmuno assay. RESULTS: The left ventricular ejection fraction was 34+/-1%, the left ventricular end-diastolic diameter on M-mode echocardiography was 68+/-1 mm, while left atrial diameter was 45+/-1 mm. Univariate analysis revealed a significant correlation between both left atrial diameter and ejection fraction and N-terminal proANP and brain natriuretic peptide. All transmitral Doppler parameters showed a significant correlation with N-terminal proANP and brain natriuretic peptide. On forward stepwise regression analysis, left atrial diameter and ejection fraction were able to predict both N-terminal proANP and brain natriuretic peptide. However, of the diastolic parameters only the E/A ratio remained significant. Mildly symptomatic patients differed significantly from severely symptomatic patients in all Doppler parameters. Mildly symptomatic patients had significantly lower levels of N-terminal proANP (0.571+/-0.079 vs 2.282+/-0.340 nmol. l(-1);P<0.001) and brain natriuretic peptide (51+/-14.8 vs 474.2+/- 86.8 pg. ml(-1);P<0. 001). CONCLUSION: There is a close relationship between natriuretic peptides and diastolic Doppler parameters of left ventricular filling in patients with dilated cardiomyopathy. There is also a significant difference between patients with mild and severe functional impairment regarding both natriuretic peptides and transmitral Doppler parameters.
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Factor Natriurético Atrial/sangre , Cardiomiopatía Dilatada/sangre , Péptido Natriurético Encefálico/sangre , Disfunción Ventricular Izquierda/sangre , Cardiomiopatía Dilatada/complicaciones , Cardiomiopatía Dilatada/fisiopatología , Estudios de Casos y Controles , Diástole/fisiología , Ecocardiografía , Ecocardiografía Doppler , Femenino , Humanos , Masculino , Persona de Mediana Edad , Natriuresis , Precursores de Proteínas/sangre , Radioinmunoensayo , Disfunción Ventricular Izquierda/diagnóstico por imagen , Disfunción Ventricular Izquierda/etiologíaRESUMEN
BACKGROUND: In patients with coronary artery disease (CAD), a rate of restenosis as high as 50% is observed after percutaneous transluminal coronary angioplasty (PTCA). Frequently, this results in further revascularization procedures. Lifestyle intervention has been shown to slow the progression of CAD and to reduce cardiovascular events after myocardial infarction. However, no information exists whether such treatment influences the rate of restenosis in patients with CAD. The present study was performed to investigate the effects of an intensified lifestyle intervention on the need for further revascularization procedures in patients with established CAD after successful PTCA. DESIGN: A total of 60 patients were included and randomized to either conventional treatment by cardiologists and general practitioners or additional intensified lifestyle intervention in a diabetes and metabolism outpatient clinic for 12 months. The mean observation time after successful PTCA was 26 months. The primary outcome variable was the need for further revascularization procedures because of clinical restenosis. Secondary outcome variables were lifestyle-related measures. RESULTS: Intervention resulted in a reduction in body weight and blood pressure, and in increased physical activity. Furthermore, nutritional habits were changed towards less fat intake, and body composition changed towards a higher proportion of fat-free mass. The need for further revascularization procedures was reduced from a total of 14 out of 32 in the conventionally treated group to 3 out of 28 in the intervention group. This resulted in an event-free survival probability of 0.89 in the intervention group and 0.57 in the control group (P = 0.0055, log rank) with a resulting relative risk of 0.26 (95% CI 0.09-0.74). CONCLUSION: In conclusion, our data strongly suggest that intensified lifestyle modification is able to reduce the need for further revascularization procedures after PTCA in patients with CAD.
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Conductas Relacionadas con la Salud , Estilo de Vida , Revascularización Miocárdica , Angina de Pecho/dietoterapia , Angina de Pecho/terapia , Angioplastia Coronaria con Balón , Enfermedad de la Arteria Coronaria/dietoterapia , Enfermedad de la Arteria Coronaria/prevención & control , Enfermedad Coronaria/dietoterapia , Enfermedad Coronaria/terapia , Supervivencia sin Enfermedad , Ejercicio Físico , Femenino , Estudios de Seguimiento , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Medición de Riesgo , Prevención SecundariaRESUMEN
OBJECTIVES: To study the association between cognitive status and plasma concentrations of various antioxidants in middle-aged and older individuals without neuropsychiatric disease. DESIGN: Evaluation of cross-sectional data from a cohort study. SETTING: The Austrian Stroke Prevention Study. PARTICIPANTS: A total of 1769 subjects aged 50 to 75 years, with no history or signs of neuropsychiatric disease, selected randomly from the community register. MEASUREMENTS: The score on the Mattis Dementia Rating Scale (MDRS) was dichotomized according to age-and education-specific lowest quartile cut-off points. Reversed-phase high performance liquid chromatography measurements of the plasma concentrations of lutein/zeaxanthin, cryptoxanthin, canthaxanthin, lycopene, alpha-carotene, beta-carotene, retinol, gamma-tocopherol, alpha-tocopherol, and ascorbate were measured. RESULTS: Individuals with MDRS results below the lowest quartile cut-off point had lower levels of beta-carotene and alpha-tocopherol than their counterparts with test performance above this limit (0.44+/-.33 micromol/L vs 0.51+/-.48 micromol/L, P < .001; and 29.50+/-7.98 micromol/L vs 30.93+/-11.10 micromol/L, P < .001, respectively). Only alphatocopherol remained significantly associated with cognitive functioning when logistic regression analysis was used to adjust for possible confounders including age, sex, month of blood sampling, years of education, smoking, lipid status, and major risk factors for stroke (P = .019). CONCLUSION: These observations are compatible with the view that some dietary antioxidants may protect against cognitive impairment in older people.
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Envejecimiento/fisiología , Antioxidantes/metabolismo , Cognición/fisiología , Factores de Edad , Anciano , Análisis de Varianza , Austria , Trastornos Cerebrovasculares/etiología , Trastornos Cerebrovasculares/prevención & control , Estudios Transversales , Demencia/sangre , Demencia/diagnóstico , Femenino , Humanos , Modelos Logísticos , Masculino , Escala del Estado Mental , Persona de Mediana Edad , Estaciones del AñoRESUMEN
BACKGROUND AND PURPOSE: Genetic polymorphism at the paraoxonase locus is associated with serum concentration and activity of paraoxonase and with increased risk for coronary heart disease. Two frequent polymorphisms present at the paraoxonase gene are the methionine (M allele) leucine (L allele) interchange at position 54 and the arginine (B allele) glutamine (A allele) interchange at position 191. This is the first study to determine the effect of these polymorphisms on carotid atherosclerosis. METHODS: The paraoxonase genotypes at positions 54 and 191 of 316 randomly selected individuals aged 44 to 75 years were determined by polymerase chain reaction-based restriction enzyme digestion. Carotid atherosclerosis was assessed by color-coded Duplex scanning and was graded on a 5-point scale ranging from 0 (normal) to 5 (complete luminal obstruction). RESULTS: The LL, LM, and MM genotypes at position 54 were noted in 137 (43.4%), 132 (41.8%), and 47 (14.9%) subjects; the AA, AB, and BB genotypes at position 191 occurred in 172 (54.4%), 124 (39.2%), and 20 (6.3%) individuals. The LL genotype was significantly associated with the presence and severity of carotid disease (P=0.022), whereas the 191 polymorphism had no effect. Logistic regression analysis with age and sex forced into the model demonstrated plasma fibrinogen (odds ratio [OR], 1.005 per mg/dL), LDL cholesterol (OR, 1.01 per mg/dL), cardiac disease (OR, 1.75), and the paraoxonase LL genotype to be significant predictors of carotid atherosclerosis. The ORs for the associations with age and sex were 1.09 (P=0.0003) and 1.66 (P=0.052) per year. CONCLUSIONS: These data suggest that the paraoxonase LL genotype may represent a genetic risk factor for carotid atherosclerosis.
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Arteriosclerosis/genética , Enfermedades de las Arterias Carótidas/genética , Trastornos Cerebrovasculares/prevención & control , Esterasas/genética , Polimorfismo Genético/genética , Anciano , Alelos , Secuencia de Aminoácidos , Arteriosclerosis/diagnóstico por imagen , Arildialquilfosfatasa , Austria , Enfermedades de las Arterias Carótidas/diagnóstico por imagen , Femenino , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , Factores de Riesgo , Ultrasonografía Doppler DúplexRESUMEN
Heart failure is a clinical syndrome caused by various etiologic factors. The physician should undertake every effort to identify potentially reversible causes that lead to heart failure. Therefore one should go through various non-invasive as well as invasive diagnostic procedures. The diagnostic tests can be helpful in identifying patients with a poor prognosis.
Asunto(s)
Insuficiencia Cardíaca/diagnóstico , Diagnóstico Diferencial , Insuficiencia Cardíaca/etiología , Insuficiencia Cardíaca/fisiopatología , Hemodinámica/fisiología , Humanos , Grupo de Atención al Paciente , PronósticoRESUMEN
Prevention of disease leading to cardiac dysfunction, improvement of quality of life and reduction of mortality are the primary objectives in the treatment of chronic heart failure. The therapeutic possibilities are various, including general advices, pharmacological therapy and surgical interventions. Standard medical treatment of systolic cardiac dysfunction contains ACE inhibitors, diuretics and cardiac glycosides. Beta-blocking agents, oral anticoagulation and antiarhythmic drugs can be used in addition. A therapeutic management of chronic heart failure tailored to the individual patient has nowadays become available due to multiple treatment options.