Stroke radiology and distinguishing characteristics of intracranial atherosclerotic disease in native South Asian Pakistanis.

BACKGROUND: There are no descriptions of stroke mechanisms from intracranial atherosclerotic disease in native South Asian Pakistanis. METHODS: Men and women aged ≥ 18 years with acute stroke presenting to four tertiary care hospitals in Karachi, Pakistan were screened using magnetic resonance angiography/transcranial Doppler scans. Trial of ORG 10172 in Acute Stroke Treatment criteria were applied to identify strokes from intracranial atherosclerotic disease. RESULTS: We studied 245 patients with acute stroke due to intracranial atherosclerotic disease. Two hundred thirty scans were reviewed. Also, 206/230 (89.0%) showed acute ischaemia. The most frequent presentation was with cortically based strokes in 42.2% (87/206) followed by border-zone infarcts (52/206, 25.2%). Increasing degrees of stenosis correlated with the development of both cortical and border-zone strokes (P = 0.002). Important associated findings were frequent atrophy (166/230, 72.2%), silent brain infarcts (66/230, 28%) and a marked lack of severe leukoaraiosis identified in only 68/230 (29.6%). A total of 1870 arteries were studied individually. Middle cerebral artery was the symptomatic stroke vessel in half, presenting with complete occlusion in 66%. Evidence of biological disease, symptomatic or asymptomatic was identified in 753 (40.2%) vessels of which 543 (72%) were significantly (>50%) stenosed at presentation. CONCLUSION: Intracranial atherosclerotic disease is a diffuse process in Pakistani south Asians, with involvement of multiple vessels in addition to the symptomatic vessel. The middle cerebral artery is the most frequent symptomatic vessel presenting with cortical embolic infarcts. There is a relative lack of leukoaraiosis. Concomitant atrophy, silent brain infarcts and recent ischaemia in the symptomatic territory are all frequently associated findings.

The Karachi intracranial stenosis study (KISS) Protocol: an urban multicenter case-control investigation reporting the clinical, radiologic and biochemical associations of intracranial stenosis in Pakistan.

BACKGROUND: Intracranial stenosis is the most common cause of stroke among Asians. It has a poor prognosis with a high rate of recurrence. No effective medical or surgical treatment modality has been developed for the treatment of stroke due to intracranial stenosis. We aim to identify risk factors and biomarkers for intracranial stenosis and to develop techniques such as use of transcranial doppler to help diagnose intracranial stenosis in a cost-effective manner. METHODS/DESIGN: The Karachi Intracranial Stenosis Study (KISS) is a prospective, observational, case-control study to describe the clinical features and determine the risk factors of patients with stroke due to intracranial stenosis and compare them to those with stroke due to other etiologies as well as to unaffected individuals. We plan to recruit 200 patients with stroke due to intracranial stenosis and two control groups each of 150 matched individuals. The first set of controls will include patients with ischemic stroke that is due to other atherosclerotic mechanisms specifically lacunar and cardioembolic strokes. The second group will consist of stroke free individuals. Standardized interviews will be conducted to determine demographic, medical, social, and behavioral variables along with baseline medications. Mandatory procedures for inclusion in the study are clinical confirmation of stroke by a healthcare professional within 72 hours of onset, 12 lead electrocardiogram, and neuroimaging. In addition, lipid profile, serum glucose, creatinine and HbA1C will be measured in all participants. Ancillary tests will include carotid ultrasound, transcranial doppler and magnetic resonance or computed tomography angiogram to rule out concurrent carotid disease. Echocardiogram and other additional investigations will be performed at these centers at the discretion of the regional physicians. DISCUSSION: The results of this study will help inform locally relevant clinical guidelines and effective public health and individual interventions.

Short communication: a study on the packaging information of essential drug products used at Union and Thana health complex level in Bangladesh.

The samples of secondary packaging items (cartons, labels and package inserts) of 45 essential drug products used at Union health and family welfare center and Thana health complex level, that included 23 solid (tablet and capsule), 34 liquid (syrup, suspension, and injectables) and 4 semisolid (ointment and cream) preparations either manufactured in Bangladesh or imported by local distributing agencies, were thoroughly examined from April 30, 2005 to March 31, 2006 on the basis of 32 parameters which are usually regarded important for the labeling of any pharmaceutical preparation including essential drug products. Many of the products were available simultaneously as solid, liquid and topical (total 74 different) dosage forms and all dosage forms have been considered in this study. The secondary packaging items of a total of 58 pharmaceutical companies for 45 generics of essential drug products have been collected, sorted/arranged and meticulously studied, and packaging parameters were accumulated for analysis. It has been observed that many of the important packaging information were either completely missing or not properly described. This study was aimed at examining the extent of the packaging information provided in the secondary packaging items.