RESUMEN
BACKGROUND: Subclinical chronic inflammation could be the driving force behind the recently revealed association between abnormal nailfold capillaries as well as autoantibodies and long-term mortality in patients with incipient Raynaud's phenomenon. Whether laboratory markers that reflect a chronic inflammatory process are directly related to mortality in Raynaud's phenomenon is not known. METHODS: In total, 2958 patients with incipient Raynaud's phenomenon without previously known connective tissue disease (CTD) were enrolled. At their initial presentation, laboratory tests for C-reactive protein (CRP), leucocytes, fibrinogen and the haemoglobin concentration were obtained. In addition, nailfold capillaries and antinuclear antibodies (ANA) were assessed. Patients' mortality was recorded through a median follow-up period of 9.3 years. RESULTS: Baseline CRP, fibrinogen and haemoglobin concentration were associated with long-term mortality in an individual analysis of patients with incipient Raynaud's phenomenon. In a multivariable model including patients' age, nailfold capillaries and ANA, a low haemoglobin concentration remained independently related to future mortality. Amongst potential predictors for mortality in patients with Raynaud's phenomenon, a low haemoglobin concentration was most strongly related to patients' mortality risk. CONCLUSION: In Raynaud's phenomenon, laboratory markers that can be attributed to a chronic inflammatory state independently yield prognostic information in addition to the presence of abnormal nailfold capillaries and ANA. Amongst all prognostic markers, the haemoglobin concentration is most strongly related to patients' mortality in Raynaud's phenomenon.
Asunto(s)
Autoanticuerpos/sangre , Proteína C-Reactiva/metabolismo , Predicción , Inflamación/sangre , Enfermedad de Raynaud/mortalidad , Adulto , Austria/epidemiología , Biomarcadores/sangre , Causas de Muerte/tendencias , Femenino , Estudios de Seguimiento , Humanos , Inflamación/inmunología , Inflamación/mortalidad , Masculino , Persona de Mediana Edad , Pronóstico , Enfermedad de Raynaud/sangre , Enfermedad de Raynaud/inmunología , Estudios Retrospectivos , Tasa de Supervivencia/tendenciasRESUMEN
Purpose: Vascular ultrasound (US) allows the analysis of vascular strain by speckle-tracking. This study sought to assess the extent to which vas cular strain varies between different segments of the arterial tree. Furthermore, this study aimed to investigate the reproducibility of vascular strain determination as well as of the components that contribute to the variance of vascular strain measurements in different vascular beds. Materials and Methods: Speckle-tracking was used to determine the vascular strain of the abdominal aorta (AA), the common carotid artery (CCA), the common femoral (CFA) and the popliteal artery (PA) of healthy adults. Intra- and interday reproducibility and the components of variance of vascular strain of the respective arteries were determined. Results: A total of 589 US clips obtained in 10 healthy adults (7 males, 28.3â±â3.2 years) were analyzable. Vascular strain was 7.2â±â3.0â% in the AA, 5.7â±â2.1â% in the CCA, 2.1â±â1.1â% in the CFA and 1.9â±â1.1â% in the PA. The intraday coefficients of variation of vascular strain were 6.2â% (AA), 3.9â% (CCA), 3.3â% (CFA) and 6.1â% (PA), and the interday coefficients of variation were 5.9â% (AA), 8.4â% (CCA), 10â% (CFA) and 4.6â% (PA). The variance of vascular strain mainly depended on the investigated vessel and subject. Individual DUS clips, the day of examination and the (right/left) body side (in paired arteries) had no impact on the variance of vascular strain. Conclusion: Vascular strain substantially varies between different sites of the arterial tree. Speckle-tracking by DUS allows the reliable determination of vascular strain at different arterial sites.