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Biomedical subjects

E Loftus

Publications and source records attributed to E Loftus.

5 recordsLinked to original sources

Memory for memory.

Participants read short passages and 1 day later they answered questions via telephone about the passages (text facts) and about the experimental session (event facts). They were telephoned again 6 weeks later and answered the same questions about text and event facts. They also answered new questions about whether they remembered the answers they had given in the initial telephone interview (recall for prior memory performance). Although participants accurately remembered the majority of past memory successes, they were poor at remembering past memory failures. After being provided with the correct answer and tested again, the participants' performance improved somewhat, especially for memory failures. This suggests that some errors in recalling past forgetting might have been due to correctly remembering the answer previously given, but failing to realize that it had been wrong. These findings have implications for a variety of situations in which people are queried about past memory performance.

Adolescent↗

Establishing a mobile coronary care service in a rural setting.

A mobile coronary care unit (MCCU) service was introduced at Sligo General Hospital in 1992. Initially, a medical registrar and CCU staff nurse drove a fully equipped MCCU car to the patient location (Phase 1). When the patient was medically stabilised and had received thrombolysis, if appropriate, the doctor and nurse travelled with him in the conventional ambulance to the hospital. Subsequently, on a pilot basis, the doctor, nurse and equipment were transported by taxi to the patient (Phase 2). Since 1995, the MCCU service has been provided routinely by Sligo General Hospital (Phase 3). During each Phase the proportion of patients with acute myocardial infarction (AMI) was as follows: Phase 1--16 of 35 (46%), Phase 2--7 of 19 (36%), Phase 3--53 of 154 (34%). The incidence of unstable angina (UA) was 25%, 32% and 26% during each of the three Phases. Five patients had successful out of hospital (OOH) defibrillation and 56(74%) of the 76 AMI patients had OOH thrombolysis. The MCCU reduced the median "Call to needle" time by 64 minutes in Phase 1 and 102 minutes in Phase 2 compared to the conventional service. Median delay to MCCU treatment was 46, 40 and 80 minutes during each of the three Phases. In an Irish setting, a MCCU service provided rapid safe and effective care, including thrombolysis and defibrillation for patients with suspected AMI.

Coronary Care Units↗

Repression: a mistaken impression?

How do clinical observations of repression square with experimental evidence suggesting that emotionally arousing memories are especially enduring? This discrepancy can be understood by examining three kinds of memory distortions that give the impression in a clinical context, of repression. Potentially traumatic events such as childhood sexual abuse (CSA) may be subject to ordinary forgetting. Recent research suggests people who fail to understand the sexual nature of CSA report that they remember it less well. In other words, the event occurred and it was forgotten, but not "repressed." In addition, people may be wrong about experiencing a period of forgetting, i.e. the event occurred but was never forgotten. Finally, people may believe that a particular traumatic event occurred and was repressed when, in fact, it did not happen in the first place. Under certain circumstances, some combination of these distortions could lead to situations that are mistakenly interpreted as repression.

Adolescent↗

Diagnosis and monitoring of Whipple disease by polymerase chain reaction.

BACKGROUND: Whipple disease is a chronic, multisystem disorder associated with infection with Tropheryma whippelii, an organism that has not yet been grown on artificial media. In some cases, the diagnosis of Whipple disease is uncertain if it is based on histology alone. Although antibiotic regimens of various durations have been used, the disease recurs in about one third of cases. No test for cure is available. OBJECTIVE: To develop a test that is more sensitive and specific than histologic examination to diagnose Whipple disease and monitor the effects of antibiotic therapy. DESIGN: Retrospective, laboratory-based evaluations of stored tissue specimens. PATIENTS: 30 patients with clinically diagnosed, histologically confirmed Whipple disease and 8 patients in whom Whipple disease was clinically suspected but who did not have definitive histologic evidence. MEASUREMENTS: Pretreatment and post-treatment biopsy specimens of the small bowel and lymph node were tested by polymerase chain reaction for the presence of T. whippeli DNA. RESULTS: Results on PCR were positive in 29 of the 30 specimens from patients with histologically confirmed disease (sensitivity, 96.6%; specificity, 100%) and in 7 of the 8 specimens from patients in whom disease was clinically suspected. Small-bowel biopsy specimens were obtained after treatment from 17 patients (median duration of follow-up, 119 months); specimens from 12 of these patients had positive results on PCR. When these cases were correlated with therapeutic outcome, it was found that 7 of the 12 patients had clinical relapse during subsequent follow-up or had never responded to treatment (positive predictive value, 58% [95% CI, 28% to 85%]). In contrast, none of the 5 patients whose post-treatment biopsy specimens had negative results on PCR had relapse (negative predictive value, 100% [CI, 48% to 100%]; P = 0.044). No correlation was found between post-treatment histology and clinical outcome (P > 0.2). CONCLUSIONS: Polymerase chain reaction is highly sensitive and specific when used to confirm the diagnosis of Whipple disease, to identify inconclusive and suspicious cases, and to monitor response to therapy. A negative result on PCR may predict a low likelihood of clinical relapse; a positive test result that remains positive despite therapy may be associated with a poor clinical outcome. Histopathologic evaluation of post-treatment specimens does not predict clinical cure or relapse.

Actinobacteria↗