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Biomedical subjects

D C Poskanzer

Publications and source records attributed to D C Poskanzer.

At least 37 records · Page 2Linked to original sources
PubMed1977

Cooperative study of hospital frequency and character of transient ischemic attacks. V. Symptom analysis.

All patients (1,328) suspected of having transient ischemic attacks (TIA) who came to six institutions during a 21-month period were identified. Symptoms and symptom complexes were related to the clinical diagnoses by cross-tabulation, factor analysis, and discriminant analysis. The diagnoses obtained by the discriminant analysis program were comparable to those of reviewing clinical neurologists. Symptoms of importance in the vertebral-basilar system (VBS) were bilateral visual blurring, diplopia, ataxia, and dizziness; In either carotid system (CAS), ipsilateral monocular visual disturbance anc contralateral weakness or sensory complaints; in the left CAS, language disturbances; and in those whose ultimate diagnosis was not TIA, loss of consciousness, confusion, and bilateral leg weakness. Patients with VBS TIAs have symptoms common to conditions that are not TIA and have a greater variety of symptoms and more combinations of symptoms than CAS TIA.

Aphasia↗
PubMed1977

Cooperative study of hospital frequency and character of transient ischemic attacks. IV. The reliability of diagnosis.

All patients (1,328) suspected of having transient ischemic attacks (TIA) who came to six institutions over a 21-months period were identified. Each case was reviewed by a neurological investigator, and a definite diagnosis of TIA was supported in 39% and ruled out in 30%. The reliability of the neurologist's review diagnosis was assessed by three methods, and close agreement (84% to 93%) was obtained. Factors demonstrated to effect the diagnosis were historical information, neurological training of the examiners, type of symptom complex, presence of carotid artery bruits, and examination during an attack.

Cerebrovascular Disorders↗
PubMed1977

Cooperative study of hospital frequency and character of transient ischemic attacks. III. Variations in treatment.

Variations in therapy for patients with complaints suggesting transient ischemic attacks (TIAs) among six participating medical centers are described. Selected treatment, based on clinical interpretation of patient characteristics, varied widely among centers. Therefore, results cannot be attributed to specific treatment. Nevertheless, there was little difference between treatment categories and the likelihood of further TIAs. The mortality of the patients who had received anticoagulants was significantly higher (P less than .001) than those patients receiving other treatment. Possible reasons for these differences are discussed.

Age Factors↗
PubMed1977

A cooperative study of hospital frequency and character of transient ischemic attacks. II. Performance of angiography among six centers.

Angiographic procedures were carried out on 36% of 1,328 patients suspected of having transient ischemic attacks (TIA). Among six participating centers, this ranged from 13% to 82%. This large difference might be related to the number of patients considered good surgical candidates and differences in the use of screening noninvasive diagnostic techniques. Arch studies, using catheter techniques, were performed most often. Although 13% of the patients had transient complications, permanent neurological deficits occurred in only 0.65%. Angiographic lesions were best correlated to clinical symptoms in those patients thought to definitely have carotid artery system TIA but were commonly seen in all other groups. Thus, clinical correlation was poor.

Basilar Artery↗
PubMed1977

Cooperative study of hospital frequency and character of transient ischemic attacks. I. Background, organization, and clinical survey.

To better understand transient ischemic attacks (TIA), all patients (1,328) with TIA-like symptoms were identified at six participating institutions representing known variations in geography, referral patterns, and socioeconomic status. A total of 954 patients were observed for a mean of 14.3 months. Problems in diagnosis are defined, demographic information is summarized, and features of the histroy, examination, tests, and treatments are noted.

Age Factors↗
PubMed1977

Clinical and angiographic features of carotid transient ischemic attacks.

To determine the prevalence of radiologically evident carotid stenosis in patients with transient cerebral ischemic attacks, we analyzed 95 consecutive hospitalized patients who during a two-year period had appropriate symptoms and also underwent angiography. Pure transient hemisphere symptoms affected 52 patients, pure monocular blindness occurred in 33, and 10 experienced each type of attack separately. Tight stenosis (less than or equal to 2 mm) or occlusion was present in 49 patients (52 per cent). Thirteen patients showed intracranial-branch occlusion, nine of whom had no notable stenosis. Only two clinical transient ischemic attack features correlated with angiographic findings: in transient hemisphere attacks lasting for one hour or longer, the carotid arteries revealed no notable stenosis (0.05 less than P less than 0.1); and separate hemisphere and ocular attacks in the same patient correlated with tight carotid stenosis. On the basis of the angiographic findings, the study indicates there are several distinct groups of patients with carotid transient ischemic attacks.

Arterial Occlusive Diseases↗
PubMed1977

Epidemiology of vaginal adenosis and adenocarcinoma associated with exposure to stilbestrol in utero.

Following the observation that maternal ingestion of diethylstilbestrol was associated with the development of adenocarcinoma of the vagina in young women, analysis of 170 cases of the disease, collected over a two-year period, was undertaken. Details of history of non-steroidal estrogenic intake during pregnancy, its dosage and duration of intake and prevalence of concomitant abnormalities of the vagina and cervix were recorded. This analysis disclosed that dosage and duration of intake do not appear to be vital factors in contributing to the development of carcinoma. A controlled, prospective investigation of prenatal exposure to stilbestrol was also carried out. Vaginal and cervical abnormalities were common among 110 young women exposed to stilbestrol in utero. Biopsy-proved vaginal adenosis was present in 35% of the exposed population as compared with only 1% of the control subjects. Fibrous ridges of the vagina and cervix and failure of the vaginal mucosa and portions of the cervix to stain with iodine were also more frequently observed in the exposed population. While the risk of developing adenocarcinoma appears to be very low, a majority of exposed females do have other abnormalities of the lower genital tract. While some investigators believe that adenosis is a premalignant lesion, at present there is no clear-cut evidence of transition from adenosis to adenocarcinoma.

Adenocarcinoma↗