PubMed Health⌕ Search

Biomedical subjects

Mohammed Saeed

Publications and source records attributed to Mohammed Saeed.

6 recordsLinked to original sources
PubMed2005

Fractals analysis of cardiac arrhythmias.

Heart rhythms are generated by complex self-regulating systems governed by the laws of chaos. Consequently, heart rhythms have fractal organization, characterized by self-similar dynamics with long-range order operating over multiple time scales. This allows for the self-organization and adaptability of heart rhythms under stress. Breakdown of this fractal organization into excessive order or uncorrelated randomness leads to a less-adaptable system, characteristic of aging and disease. With the tools of nonlinear dynamics, this fractal breakdown can be quantified with potential applications to diagnostic and prognostic clinical assessment. In this paper, I review the methodologies for fractal analysis of cardiac rhythms and the current literature on their applications in the clinical context. A brief overview of the basic mathematics of fractals is also included. Furthermore, I illustrate the usefulness of these powerful tools to clinical medicine by describing a novel noninvasive technique to monitor drug therapy in atrial fibrillation.

Adult↗
PubMed2004

DEET mosquito repellent sold through social marketing provides personal protection against malaria in an area of all-night mosquito biting and partial coverage of insecticide-treated nets: a case-control study of effectiveness.

DEET (diethyl-3-methylbenzamide), the widely used mosquito repellent, has the potential to prevent malarial infection but hitherto there has been no study demonstrating this possibility during normal everyday use. Mosbar, a repellent soap containing DEET, was promoted through social marketing in villages in eastern Afghanistan. This was followed up with a case-control study of effectiveness against malarial infection conducted through local clinics. Mosbar was purchased by 43% of households. Reported use of insecticide-treated nets (ITNs) was 65% among the control group. There was a strong association between Mosbar use and ITN use, as 81% of Mosbar users also possessed ITN. The use of Mosbar was associated with a 45% reduction in the odds of malaria (95% CI: -11% to 72%, P=0.08) after adjusting for ITN and other unmatched factors. Ownership of ITNs was associated with a 46% reduction in the odds of malaria (95% CI: 12% to 67%, P=0.013) after adjusting for Mosbar and other unmatched factors. The greatest reduction in the odds of malaria was associated with combined use of Mosbar and ITN (69% reduction, 95% CI: 28% to 87%, P=0.007). The association between recalled use of Mosbar 10 days ago (nearer the time of infection) and reduction in malarial infections (adjusted odds ratio 0.08, 95% CI: 0.01-0.61, P=0.001) was significantly stronger than that shown by current use of Mosbar. Most purchasers of Mosbar were satisfied with the product (74%), although a minority said they preferred to use only ITN (8%). The local mosquito vectors, Anopheles stephensi and A. nigerrimus, started biting shortly after dusk and continued biting until early morning. It was shown that Mosbar prevented biting throughout this period. In regions where mosquito vectors bite during evening and night, repellents could have a useful supplementary role to ITN and their use should be more widely encouraged.

Adolescent↗
PubMed2004

Child psychiatric disorders in a primary care Arab population.

OBJECTIVES: Physical and psychiatric comorbidity is relatively common in general practice but there have been few systematic studies using clinical interviews of children attending the primary care services in the Arab population, and none from the Gulf countries. This study was undertaken to determine the prevalence and nature of child psychiatric morbidity in primary care in the United Arab Emirates (UAE). METHOD: Systematic psychiatric evaluations were carried out on consecutive children aged 6 to 18 years visiting their primary care doctors in Al Ain. The sample consisted of 141 (50.7%) boys and 137 (49.3%) girls. RESULTS: Forty-three percent of the 278 children received a DSM-IV diagnosis. Of these, 46 (38%) were males and 74 (62%) were females. However, only 1.1% (3/120) of the patients consulted general practitioners for a primary psychiatric symptom. The most common diagnosis was anxiety disorder followed by depression. Obsessive compulsive disorder was present in 11%, conduct disorder in 7%, and attention deficit hyperactivity disorder in 3% of those with a diagnosis. A statistically significant association was found between DSM-IV caseness and female gender, higher number of children in the household, relationship problems in the family, physical illness and family history of psychiatric disorder. Other factors that did not show any significant association were age, nationality, socioeconomic status, parental education or occupation, scholastic performance or developmental delay in the child, or parental consanguinity. CONCLUSION: Our findings suggest that psychiatric disorders are common among young people of Arab origin attending primary care facilities, and that doctors need to be vigilant about this possibility.

Adolescent↗
PubMed2003

Robot Schmobot...

Explore the source record for details and available documents.

Cardiac Pacing, Artificial↗
PubMed2002

Off-pump cardiac revascularization after a complex stab wound.

Penetrating cardiac injuries are among the most dramatic and lethal of all injuries. High survival rates in selected reports have given the erroneous impression that the lethality of cardiac injuries has diminished in recent years. In a review of 1,198 cases of penetrating cardiac trauma from South Africa, only 6% of patients arrived at hospital alive. Many patients with proximal coronary artery injuries present without signs of life. Cardiopulmonary bypass is advocated as a means of salvage, but mortality rates are high. We present a case of arterial revascularization using off-pump technology.

Adult↗