Search PubMed⌕ Search

Biomedical subjects

M Mohamed

Publications and source records attributed to M Mohamed.

30 records · Page 2Linked to original sources
PubMed1994

Determination of naltrexone dosage for narcotic agonist blockade in detoxified Asian addicts.

Thirty-eight, adult, male, detoxified, Malaysian opiate addicts participated in this double-blind clinical evaluation of naltrexone. Addicts from three ethnic groups: Chinese, Malays, and Indians received a weekly regimen of naltrexone (100 mg on Days 1 and 3, and 150 mg on Day 5). Subjects were randomly assigned to receive intravenous challenge with either 25 mg heroin or placebo 12, 24, 48, and 72 h after the third naltrexone dose. Physiological and subjective parameters were measured at each challenge interval. Results indicated that naltrexone was effective in blocking the physiological and psychological effects of heroin for at least 48 and 72 h, respectively, in detoxified Malaysian opiate addicts. The efficacy of naltrexone did not differ among the three ethnic groups evaluated in this study.

Adult↗
PubMed1993

Initial nonfunction in cadaveric renal transplantation.

Patients who receive a kidney transplant that does not function immediately have more complications and decreased graft survival than patients whose allografts function immediately. To determine the causes of initial nonfunction (INF), the authors reviewed 188 consecutive cadaveric kidney transplants performed between 1985 and 1988 at the University Hospital, London, Ont. Data were collected on 16 putative risk factors for INF, which were divided into three categories: donor, recipient and technical. INF was defined as the need for dialysis within 7 days of transplantation. Forty-eight (26%) of the 188 allografts had INF, 6 of which never functioned. Univariate analysis identified five variables associated with increased risk of INF: no donor dopamine use, back-table flush, single-organ retrieval, exchanged kidney and prolonged cold ischemic time. Multivariate analysis, however, identified only three variables associated with INF: cerebrovascular accident as the cause of donor death, no donor dopamine use and single-organ retrieval. The authors recommend (a) low-dose dopamine therapy for all donors and (b) multiorgan retrieval to produce quality kidneys for transplantation.

Cadaver↗
PubMed1989

Cardiomyopathy in pregnancy: 2 case reports.

Cardiomyopathy developed in the peripartum period in two healthy primigravida at 41 and 42 weeks of gestation are presented. In the first case, the patient presented with pulmonary oedema and had cardiac arrest immediately after admission. After resuscitation, a live baby was delivered by Caesarean section. Second cardiac arrest occurred after 12 hours of operation and the patient was resuscitated again. On the 8th post operative day, patient died of D.I.V.C. and renal failure. The second case was a twin pregnancy associated with pregnancy induced hypertension. Caesarean section was performed for foetal distress. She developed pulmonary oedema with left ventricular failure on the second post operative day, was resuscitated and discharged on the 15th day. These are the first two cases to be reported from Hospital University Sains Malaysia. Reference is made to three other cases in which a similar pathological process might have occurred.

Adult↗
PubMed1986

Coronary artery disease in patients aged 30 and younger.

Twenty-four male patients aged 18-30 (mean = 27.4) years were catheterized either after myocardial infarction (22 patients) or because of angina pectoris (2 patients). In this highly-selected group, 18 of 24 smoked but only 5 had elevated cholesterol levels. Of 14 patients with anterior myocardial infarction (AMI), 7 had a significant left anterior descending obstruction while the other 7 had nonsignificant or no coronary stenosis. In 8 patients with inferior MI (IMI), 4 had significant multivessel disease. Five of 6 patients with multivessel disease smoked while 4 had hypercholesterolemia. Risk factors were absent in 3 of 16 patients with single or no coronary lesions. We conclude that angina pectoris and inferior MI carry high risk of multivessel coronary disease; there is often one or more risk factor in this subgroup. Finally, routine catheterization in young patients with AMI is not warranted.

Adolescent↗
PubMedDate not supplied

Predicting hypogonadism in men based upon age, presence of erectile dysfunction, and depression.

Hypogonadism, a disorder associated with aging, can cause significant morbidity. As clinical manifestations of hypogonadism can be subtle, the challenge and the burden of diagnosis remain the responsibility of the clinician. Four different analytic methods were used to predict hypogonadism in men based upon age, the presence of erectile dysfunction (ED) and depression. 218 men were classified by age, serum testosterone level, the presence of ED and depression. Depression was determined by the Center for Epidemiologic Studies Depression Scale (CES-D). ED was assessed by the Sexual Health Inventory for Men (SHIM). Hypogonadism was defined as a serum testosterone level <300 ng/dl. An artificial neural network (ANN) was programmed and trained to predict hypogonadism based upon age, SHIM, and CES-D scores. Subject data was randomly partitioned into a training set of 148 (67.9%) and a test set of 70 (32.1%). The ANN processed the test set only after the training was complete. The discrete predicted binary output was set to (0) if testosterone level was <300 ng/dl or (1) if >300 ng/dl. The data was also analyzed by standard logistic regression (LR), linear and quadratic discriminant function analysis (LDFA and QDFA, respectively). Reverse regression (RR) analysis evaluated the statistical significance of each risk factor. The ANN can accurately predict hypogonadism in men based upon age, the presence of ED, and depression (receiver-operating characteristic=0.725). A four hidden node network was found to have the highest accuracy. RR revealed the depression index score to be most significant variable (P=0.0019), followed by SHIM score (P=0.00602), and then by age (P=0.015). Hypogonadism can be predicated by an ANN using the input factors of age, ED, and depression. This model can help clinicians assess the need for endocrinologic evaluation in men.

Adolescent↗