Background: Microparticles (MP) are vesicles released from activated or apoptotic cells. Endothelial MP (EMP) are derived from injured endothelium, platelet MP (PMP) from activated platelets, and Annexin V positive MP (AMP) from apoptotic endothelial cells. The aim was to assess the release of MP and its association with inflammation and atherosclerotic burden. Methods and Results: AMP, EMP and PMP were measured on admission (Day 0) in 33 patients with stable angina (SA) and 43 patients with acute coronary syndrome (ACS) undergoing percutaneous coronary interventions (PCI). In SA, peripheral artery disease (PAD) was assessed by ultrasound examination. In 30 of the 76 patients (20 ACS and 10 SA), MP, high-sensitivity-C-reactive protein (hs-CRP), and troponin T (TnT) levels were also assessed 24h (Day 1) and 48h (Day 2) after PCI. AMP, EMP, and PMP were higher in ACS than in SA (all P<0.01). In the SA group, AMP, PMP, and EMP were similar in patients with or without PAD. In the ACS group, AMP increased until Day 2 (P=0.001), while EMP and PMP peaked on Day 1 (P<0.01) then decreased to baseline values. Day 2 AMP correlated with Day 2 TnT levels (r=0.43, P=0.01) while Day 1 EMP and PMP correlated with Day 1 hs-CRP (r=0.37, P=0.04 and r=0.33, P=0.05; respectively). Conclusions: Higher MP levels were observed in ACS than in SA. Atherosclerotic burden did not affect MP levels in stable patients. (Circ J 2012; 76: 2174–2182)

Objective: To assess pain and quality of life in patients with chronic vascular leg ulcers.Method: A multicentre cross-sectional study was conducted. A questionnaire to assess quality of life and report the experience of pain was developed. It incorporated the SF-12 questionnaire and a visual analogue scale (VAS) for the assessment of pain during the day, night and at dressing change.Results: A total of 381 patients (233 females, 148 males) were observed from September to November 2006. The patients had venous (52%), ischaemic (11%), mixed aetiology (10%), hypertensive (2%), microangiopatic (2%), diabetic (9%) and other (14%) types of ulcers. Women experienced more pain and had a worse quality of life than men. Venous ulcers had high mean VAS values during the day (44.4) and night (44.9). However, a higher mean value was recorded at dressing change, when it was similar to the mean for vascular ulcers (57.5 versus 56.3). There was a direct correlation between pain and quality of life, which was worse for ulcers with a longer duration and larger area. Ulcers of less than three months’ duration had mean VAS values of 38.7, 36.9, 46.8 compared with 53.8, 53.9, 62.9 for ulcers of over 12 months’ duration. Mean SF-12 values for the physical component of the questionnaire also showed that patients whose ulcers had a longer duration had a poorer quality of life (35.9) than patients whose ulcers were more recent (40.9).Conclusion: Vascular leg ulcers are very painful and result in a poor quality of life, with a direct correlation with both ulcer duration and ulcer area. Pain relief is required, particularly at dressing changes, as is the selection of advanced wound dressings.Declaration of interest: None.

To investigate the ionizing radiation dose, image quality, and diagnostic performance of computed tomographic (CT) angiography of the peripheral arteries with three different CT angiographic acquisition protocols, with use of pretreatment digital subtraction angiography (DSA) as the reference standard. The study was approved by the institutional review board and performed in agreement with the 1990 Declaration of Helsinki and subsequent amendments. Each patient provided informed consent before undergoing CT. The authors performed a prospective, single-center, randomized comparison of three different x-ray exposure CT acquisition protocols in 60 randomized patients with peripheral arterial occlusive disease referred for 64-section multidetector CT angiography of the lower limb (0.625-mm collimation, intravenous administration of 100 mL of iomeprol [400 mg iodine per milliliter] at 4 mL/sec). The acquisition protocols were performed with (a) 120 kVp and a noise index of 26 (moderate noise reduction [MNR]), referred to as the 120-kVp MNR group; (b) 80 kVp and a noise index of 26, referred to as the 80-kVp MNR group; and (c) 80 kVp and a noise index of 30 (high noise reduction [HNR]), referred to as the 80-kVp HNR group. Axial and three-dimensional (3D) images were qualitatively and quantitatively compared by using the overall F test and pairwise comparisons. The X(2) test was used to compare the three protocols in terms of diagnostic performance in patients who also underwent DSA before an interventional procedure. Significantly higher attenuation values were obtained in the vessels with the 80-kVp MNR and 80-kVp HNR acquisition protocols. No significant differences were noted in terms of image quality with either axial source images or 3D reconstructions. Likewise, no significant differences were found among the three protocols in terms of noise throughout the peripheral vasculature. Finally, no significant differences were found among the three groups with regard to diagnostic performance. Overall dose reductions of 48% and 61% were obtained for the 80-kVp MNR and 80-kVp HNR protocols, respectively. Substantial reductions of radiation dose are achievable at multidetector CT angiography of the peripheral arteries without compromising image quality and diagnostic performance if acquisition protocols are modified appropriately and used in conjunction with a contrast material containing a high concentration of iodine.