Gerald S. Levey, MD

While academic medical centers all over the country currently face challenging times, no area has been harder hit by managed care than California. The ruthless cost-cutting and competition for health care contracts dealt a severe blow to both public and private hospitals. While many physicians in that market are looking to relocate elsewhere, Gerald Levey recently returned from a top level position at Merck & Co. to helm the school of medicine at the University of California, Los Angeles. Prior to Merck, Levey was chairman of medicine at the University of Pittsburgh, president of the Association of Professors of Medicine, and a member of the Board of Governors of the American Board of Internal Medicine. Now, as other Los Angeles hospitals are on the brink of closure, Levey has the formidable task of directing the UCLA Medical Center into the future. Interviewed in his office in sunny southern California, Levey reflected on UCLA's strategy in a highly competitive market and the cloudy horizon facing academic centers in the United States.

The National Study of Internal Medicine Manpower: XX. The changing demographics of internal medicine residency training programs

Three annual physician workforce surveys of internal medicine residency programs from 1990-1991, 1991-1992, and 1992-1993 show that changes in the demographic characteristics of internal medicine residents detected in the period 1986-1989 have been sustained; specifically, more women and international medical graduates are entering internal medicine. Women and international medical graduates now compose 32% and 36% of internal medicine trainees, respectively. The percentage of U.S. medical graduates was lower in traditional 3-year (categorical) tracks (64%) and highest in preliminary tracks (1 year of internal medicine leading to another specialty) (87%). Approximately 1500 more first-year residents than positions offered through the National Residency Matching Program were reported in 1992-1993. This suggests that many programs concentrate their recruiting efforts outside the Matching Program. The data also show a continuing high subspecialization rate for residents who complete 3 years of training in internal medicine (approximately 60%), although about one third do not go directly into subspecialty training. We discuss the implications of these findings for the national goal of increasing the number of primary care physicians.

Treatment of hyperthyroid disease

PURPOSE

To evaluate treatments for hyperthyroid disease.

DATA SOURCES

Selected studies published during the last 20 years addressing the diagnosis, causes, and treatment of hyperthyroid disease.

STUDY SELECTION

Studies were chosen based on their usefulness in addressing specific points in the treatment of hyperthyroid disease.

DATA EXTRACTION

Various treatment principles extracted from the references form the basis for the conclusions and recommendations made here.

RESULTS

Hyperthyroid disease is a common endocrine disease. Although Graves disease is the most common cause of thyrotoxicosis, other primary and secondary causes exist. With classic signs and symptoms accompanied by confirmatory laboratory measures of thyroid hyperfunction, the diagnosis can be established firmly. Radioiodine is the preferred method to treat Graves disease; however, recent data concerning treatment with a combination of propylthiouracil and thyroxine require further evaluation to establish its efficacy. Radioiodine is also the preferred treatment for the other forms of hyperthyroid disease; however, patient-specific considerations in both may require patient-tailored therapies.

CONCLUSIONS

Hyperthyroid disease can be treated definitively for most patients. Palliative therapy with beta-adrenergic blockade is useful in some patients. Further studies are needed to determine whether more recently described treatments have improved efficacy and whether therapy directed specifically at the underlying immunologic cause of Graves disease can be used successfully.

Three-decade investigation of familial pheochromocytoma. An allele of von Hippel-Lindau disease?

BACKGROUND

Usually sporadic, pheochromocytoma can, on occasion, complicate genetic disorders, such as neurofibromatosis 1, von Hippel-Lindau disease, and multiple endocrine neoplasia 2; some families seem to have just pheochromocytoma, where it may have occurred by chance. The natural history of a large kindred believed to have an excess of pheochromocytoma 34 years ago was followed with the hypothesis that the predisposition was, in fact, present and that family education and surveillance would decrease mortality.

METHODS

Prospective observation and diagnostic surveillance for pheochromocytoma were conducted on the inception cohort, defined as three branches of the kindred in 1960. Of 619 descendants of three (of 11) siblings of German origin, 333 were evaluated in person at least once in the three decades of surveillance. No pheochromocytomas were known to have occurred in the eight other branches. A total of 522 persons from the 11 branches were evaluated.

RESULTS

Five of the eight initial patients with pheochromocytoma died of cardiovascular complications attributable to the tumor. In follow-up, eight additional relatives were newly diagnosed with pheochromocytomas (at an average age of 19 years), and others had additional or recurrent pheochromocytomas, meningioma, para-adrenal paraganglioma, and a functioning glomus vagale; none died.

CONCLUSIONS

A continuing excess of pheochromocytoma seems present in the family. Whether the incompletely penetrant gene in this family is allelic to the von Hippel-Lindau gene on chromosome 3 or is a distinct locus remains to be resolved with molecular studies. Meanwhile, education and surveillance seem to decrease mortality from pheochromocytoma in this family.

Internal medicine and the training of international medical graduates: a time for open discussion and new approaches

The number of foreign national medical graduates entering internal medicine residency training programs in the United States has doubled since 1986. A rigorous, standardized preresidency evaluation of the basic clinical skills and language abilities of international medical graduates should be implemented. Those found to have significant deficits should undertake a preparatory curriculum designed to meet special educational needs before entry into the formal training program. A relevant curriculum might include formal lectures, reading assignments, physical diagnosis sessions, language classes, patient encounter sessions, and a tutorial on U.S medical culture that includes medical ethics and the basics of the our health care system. All or only some of these may be required for any given individual. The Educational Commission for Foreign Medical Graduates (ECFMG) could provide many of the methods needed for an evaluation program and work collaboratively with program directors. This new approach to training of international medical graduates will require an evaluation system to to measure its effectiveness. Important questions about the funding of graduate medical education for international medical graduates must also be addressed.

National Study of Internal Medicine Manpower: XIX. Trends in internal medicine residency training programs

The National Study of Internal Medicine Manpower (NaSIMM) reports on the results of its 1989-1990 census of residency programs. The results are integrated into an organizational model identifying inputs, process, outputs, and environment of medical training programs. The number of residents entering internal medicine continues to grow at a relatively rapid pace. This growth is largely accounted for by foreign citizens who are graduates of foreign medical schools (AFMGs). Residents are spending an increasing proportion of their time in ambulatory care settings, but, thus far, this ambulatory care training has occurred primarily in hospital clinics and emergency rooms. The proportion of a program's residents entering general internal medicine was found in a multiple regression analysis to be negatively associated with the number of subspecialty programs located in the training hospital, the percent of AFMG residents in the program, and the presence of a preliminary track in the program.

Changing the curriculum for internal medicine residency training

The academic leadership of internal medicine is considering fundamental changes in the curriculum for internal medicine residency training. The impetus to change the curriculum is derived from various socioeconomic changes during the past 10 years. These changes have resulted in a drastically shortened length of stay of patients in hospitals, an emphasis on outpatient care by reimbursement agencies, and a sharp decline in the numbers of U.S. medical graduates selecting careers in internal medicine. Curriculum change will mandate that we define the roles of general internists and subspecialists in the delivery of primary care and that we re-define how we train these two groups of internists. We must focus attention on the issue of service compared with education and must confront the issue of how best to train foreign medical graduates. Any curriculum change will also have to accommodate residents selecting careers in research in order to ensure an adequate supply of physician-scientists. Before implementing any change in curriculum, we must put into place a rigorous, prospective evaluation system. We must be able to accurately assess both positive and negative outcomes of these changes and make necessary midcourse corrections. The impetus for curriculum change in internal medicine will, it is hoped, ultimately benefit the public, the trainees, and the practice of internal medicine.

The inter-rater reliability and internal consistency of a clinical evaluation exercise

OBJECTIVE

To assess the internal consistency and inter-rater reliability of a clinical evaluation exercise (CEX) format that was designed to be easily utilized, but sufficiently detailed, to achieve uniform recording of the observed examination.

DESIGN

A comparison of 128 CEXs conducted for 32 internal medicine interns by full-time faculty. This paper reports alpha coefficients as measures of internal consistency and several measures of inter-rater reliability.

SETTING

A university internal medicine program. Observations were conducted at the end of the internship year.

PARTICIPANTS

Participants were 32 interns and observers were 12 full-time faculty in the department of medicine. The entire intern group was chosen in order to optimize the spectrum of abilities represented. Patients used for the study were recruited by the chief resident from the inpatient medical service based on their ability and willingness to participate.

INTERVENTION

Each intern was observed twice and there were two examiners during each CEX. The examiners were given a standardized preparation and used a format developed over five years of previous pilot studies.

MEASUREMENTS AND MAIN RESULTS

The format appeared to have excellent internal consistency; alpha coefficients ranged from 0.79 to 0.99. However, multiple methods of determining inter-rater reliability yielded similar results; intraclass correlations ranged from 0.23 to 0.50 and generalizability coefficients from a low of 0.00 for the overall rating of the CEX to a high of 0.61 for the physical examination section. Transforming scores to eliminate rater effects and dichotomizing results into pass-fail did not appear to enhance the reliability results.

CONCLUSIONS

Although the CEX is a valuable didactic tool, its psychometric properties preclude reliable assessment of clinical skills as a one-time observation.

Hyperthyroid myopathy and the response to treatment

Hyperthyroidism is accompanied by significant dysfunction of both proximal and distal skeletal muscles. The purpose of this study was to quantitate the degree of muscle weakness in newly diagnosed patients with Graves' disease and to assess the response to treatment. Ten patients were prospectively studied with objective measures of strength and endurance of proximal and distal muscles while hyperthyroid (stage I), after 2 weeks of propranolol (stage II), and about 6 months later when euthyroid (stage III). Propranolol treatment for 2 weeks resulted in a subjective decrease in weakness, which was accompanied by a statistically significant improvement in grip strength (P less than 0.01), shoulder strength (P less than 0.02), and grip endurance (P less than 0.01) but not shoulder endurance. Muscle function further improved and attained control levels when the patients were chemically and clinically euthyroid. In contrast, a control group subjected to the same muscle testing protocol before and after 1 week of propranolol treatment showed no improvement in grip, shoulder strength, or shoulder endurance but had decreased grip endurance (P less than 0.01) and increased subjective weakness. These results confirm that muscle weakness commonly is associated with hyperthyroidism and can be quantitatively profound. In contrast to the effects of beta-blockade in normal controls, propranolol partially improves muscle weakness in thyrotoxic patients. We conclude that thyroid hormone and catecholamines in concert mediate the muscle dysfunction of hyperthyroidism.

Medical student attitudes about internal medicine: a study of U.S. medical school seniors in 1988

OBJECTIVE

To determine the attitudes of medical students toward careers in internal medicine.

DESIGN

Cross-sectional national survey of U.S. medical school seniors.

PARTICIPANTS

The 10,379 respondents to the 1988 Medical Student Graduation Questionnaire from the Association of American Medical Colleges.

MEASUREMENTS AND MAIN RESULTS

Most men and women selecting internal medicine (n = 1931) as well as those switching from earlier preferences for internal medicine (n = 1606) made their final decisions about specialty during the third and fourth years of medical school. Almost 50% of students planning to be internists cited "intellectual content" as the most important factor in their choice of specialty. "Diagnostic challenge" was next most frequently cited. "Type of patient seen" and "role models" were more frequently cited as the most important factors in specialty choice for all other specialties than for internal medicine. Students who switched away from earlier preferences for general internal medicine cited the following most important factors in descending order of frequency: "too demanding of time and effort," "inconsistent with personality," "negative clerkship experiences," "don't like the type of patient," and "specialty chosen more fulfilling." The same five factors, in a different order of frequency, were given for switching from the subspecialties of internal medicine.

CONCLUSIONS

Most medical students make their final choices about specialty during or after their clerkship year. Knowledge of these students' attitudes toward internal medicine could form the basis for the development of strategies to enhance the attractiveness of internal medicine among these students while they are making their final decisions about specialty.

National Study of Internal Medicine Manpower. XVIII: Subspecialty fellowships with a special look at hematology and oncology, 1988-1989

OBJECTIVE

To determine the number and distribution of internists in subspecialty training and compare with data collected since 1976; to determine the distribution of activity of subspecialty fellows; and to focus on hematology and oncology.

DESIGN

Repeated mail survey with telephone follow-up.

PARTICIPANTS

All directors of subspecialty training programs in internal medicine in the United States.

RESULTS

The 1988-1989 census identified 7530 fellows in training, 55 more than in 1987-1988. There are 24 more first-year fellows. Reports on the activities of subspecialty fellows show that, overall, 53% of fellows' time is spent in direct patient care, 20% on basic research, 15% on patient-related research, and 12% in teaching.

CONCLUSIONS

The number of internists entering subspecialty training has risen at a considerably slower rate in the last 5 years compared with the 5 years before that. The length of subspecialty training has increased significantly since 1976. There has been a shift in subspecialty choice from hematology to oncology and toward joint programs offering both subspecialties.

National Study of Internal Medicine Manpower: XVII. Changes in the characteristics of internal medicine residents and their training programs, 1988-1989

The National Study of Internal Medicine Manpower (NaSimm) has been surveying program directors of internal medicine about their programs and residents for 13 years. The 1988-1989 survey results, when compared with the results for 1987-1988, show an increase in both the number of residency positions offered in internal medicine and the number of residents in internal medicine programs. Although the proportion of graduates from U.S. medical schools who choose internal medicine is not changing (34%), the proportion of U.S. medical school graduates who continue training in internal medicine after their first year is decreasing. The composition of the residents in internal medicine by medical school graduated is also changing. Almost 25% of the first-year residents (R1s) in internal medicine are now graduates of foreign medical schools (FMGs) compared with 14% in 1976. The proportion of first-year female residents in internal medicine has increased to 30%, whereas the proportion of both first-year blacks and Hispanics has remained constant at 5% each. In nearly 25% (109 of 440) of the residency programs, more than 50% of the R1s are FMGs. Hispanics, Asians, and blacks were found to be over-represented in the programs training larger proportions of FMGs. This over-representation is attributable, in part, to the fact that Hispanics and Asians may be FMGs. Training issues of concern to program directors continue to be the provision of ambulatory and primary care experiences and the scheduling of nights on call. The survey results show that many residency program directors have reported a reduction in the number of nights on call and an increase in the amount of time residents spend in ambulatory training.

Catecholamine-thyroid hormone interactions and the cardiovascular manifestations of hyperthyroidism

The spectrum of classic symptoms of hyperthyroidism suggests that in addition to the effects of increased thyroid hormone, affecting various organ systems, there is also a hyperadrenergic state. Despite this clinical impression, direct measures of serum levels of catecholamines and their urinary metabolites demonstrate values that are equal to or less than normal. In contrast, the hypothyroid patient who clinically manifests signs of decreased adrenergic stimulation can be expected to have increased levels of epinephrine, norepinephrine, and its metabolites. This review discusses possible mechanisms to explain this seeming paradox. Treatment of hyperthyroidism includes the rapid reversal of many of the adrenergic symptoms with use of beta-blocking drugs. Return to a clinically and chemically euthyroid state, however, requires antithyroid therapy accomplished over a longer period of time. A knowledge of the interaction of the cardiovascular and extracardiovascular manifestations of hyperthyroidism and the role of the adrenergic nervous system is important in the rational management of these patients.

Graves' disease: an analysis of thyroid hormone levels and hyperthyroid signs and symptoms

PURPOSE

Assessment of disease severity for patients with hyperthyroidism involves clinical evaluation and laboratory testing. To determine if there is a correlation between symptoms and thyroid function test results, we prospectively studied hyperthyroid patients using a standardized symptom rating scale and serum thyroid function parameters.

PATIENTS AND METHODS

We examined 25 patients with untreated, newly diagnosed Graves' disease using the Hyperthyroid Symptom Scale (HSS) and serum levels of thyroxine (T4), triiodothyronine (T3) relative insulin area (RIA), and estimates of free thyroxine index (FTI). In addition, we compared thyroid hormone levels with standard measures of depression and anxiety in these patients.

RESULTS

When regression analyses controlling for age were performed, none of these symptom ratings were associated with FTI or T3 RIA. The HSS was correlated with goiter size and anxiety ratings and was inversely correlated with age.

CONCLUSION

The present study suggests that there is no relationship between the clinical assessment of disease severity and serum levels of thyroid hormone in untreated Graves' disease.

National Study of Internal Medicine Manpower. XIV: Patterns of residency and fellowship over time, 1987 update

In response to concerns among internists following the 1987 internal medicine match, this report compares internal medicine trainees with those in other specialties since 1972, describes their paths through the internal medicine "pipeline," and documents their distribution and continuation rates in residency and subspecialty fellowship programs. It is based on the National Study of Internal Medicine Manpower, 1987-1988. Between 1972 and 1986 the number of trainees in internal medicine doubled, and the percentage of trainees in internal medicine grew from 20% to 25%, while the percentage in surgical specialties declined from 28% to 19%. The numbers of women and foreign medical school graduates training in internal medicine have continued to increase, but minority representation has stabilized. Women and minorities have lower continuation rates into fellowships, and distinctive patterns of subspecialization are found among women, minorities, and foreign medical school graduates.

National Study of Internal Medicine Manpower: XVI. Subspecialty fellowship programs, 1988 update

Much of the debate about medical manpower during the 1980s has focused on the growing number of medical subspecialists. We examined the number of subspecialty fellows since 1976, paying particular attention to data collected in the 1987-1988 academic year. The number of fellows in subspecialty training at a given time has increased by 27% since 1976; however, much of this increase is due to the increased length of the training programs. The number of first-year fellows has increased only 7% since 1976. Growth in the number of fellowships has varied by subspecialty. The number of fellowships in geriatrics, critical care, and general internal medicine has increased dramatically. Additionally, the traditional subspecialties-cardiology, pulmonary disease, gastroenterology, infectious diseases, rheumatology, and allergy-immunology-have all grown to some extent. Program directors in all subspecialties anticipate continued growth in the coming years.

Thyrotoxic periodic paralysis in a Latin-American taking acetazolamide

A Latin-American teenager was begun on a regimen of acetazolamide for a presumptive diagnosis of familial periodic paralysis. He presented 2 weeks later with near total body paralysis and was found to have florid manifestations of Graves' disease. Although thyrotoxic periodic paralysis occurs most frequently in Oriental males, it occasionally is found in Caucasians. Unlike familial, euthyroid, and periodic paralysis, thyrotoxic periodic paralysis may be worsened by administration of acetazolamide. Physical signs and laboratory evidence of hyperthyroidism must be sought in cases of periodic paralysis to differentiate the two diseases.

Adult cardiology and the expanding supply of physicians

The number of cardiologists can be projected with considerable accuracy into the next century. The total cardiology pool of physicians will increase until the year 2015 at which time those entering and leaving the pool will come into equilibrium. At that time the ratio of active cardiologists to the population will have greatly increased. This nation's future need for cardiologists is difficult to assess with any degree of precision. Therefore, this is the time for updating practice profile studies. Such studies today could be formulated in a manner to provide more detailed information on the cardiologist's daily activities. In addition, a data base developed through methodology such as the consensus formation approach must be developed and updated on a periodic basis. Through such analyses it will be possible to quantitate the future needs of cardiovascular manpower.

Postdoctoral research training of full-time faculty in academic departments of medicine

This report shows the results of a survey of 5604 faculty in departments of medicine, 4200 of whom had postdoctoral research training. As a follow-up to a previous study of research activity in the same population, this retrospective survey focused on location of training, source of funding, structure of the training program, impact of the training experience on career development, and respondents' recommendations for changes in training programs. A predominant finding is that most postdoctoral training occurred in medical schools, and the primary source of funding was the National Institutes of Health. For faculty members with the MD degree, being an active researcher and principal investigator for a peer-reviewed research grant were associated with length of training. The average length of time between the end of postdoctoral research training and obtaining the first peer-reviewed research grant was 24 months, regardless of length of training, source of training support, training site, or type of academic degree (MD, MD-PhD, or PhD). The results of this survey suggest a tentative formula to be a successful researcher in academic medicine: 2 or more years of postdoctoral research training, including formal course work in the fundamental sciences pertinent to biomedical research; 2 to 3 years of full research support from the academic institution until the first extramural grant is obtained; and commitment of at least 33% of time to research activities. The results also suggest directions for change and improvement in future research training programs.

National Study of Internal Medicine Manpower: XIII. The financing of internal medicine residency and fellowship training, 1985 to 1986

Hospital revenue is the most important source for residency and fellowship stipends in internal medicine. Medicare is especially important for residency programs in voluntary hospitals and hospitals not closely affiliated with a medical school. In the last decade state and local government support and federal training grant support for residency stipends declined, whereas Veterans Administration support increased. Fellowship stipend sources are much more diverse; federal training grants, professional fees, foundations, medical school funds, and research grants contribute significantly. Medicare support appears to be focused on subspecialties particularly important to the elderly, including critical care, rheumatology, cardiology, hematology, gastroenterology, and nephrology. Geriatric medicine, however, receives substantial Veterans Administration support. With growing revenue constraints and increasing concerns about excess physicians we need to monitor the impact of government regulations and other factors on funds available for training internal medicine specialists.

National Study of Internal Medicine Manpower. XII. The future of graduate medical education in internal medicine: what do program directors predict?

The 1985-1986 National Study of Internal Medicine Manpower asked directors of residency and fellowship programs about their plans to change the size of their programs in the near future. The vast majority (71% to 76%) of the directors expected their programs to remain about the same size for the next couple of years. For fellowship directors, this reflects a decline in the number planning to increase their program size since 1976-1977 from 32% to 18%. Directors of programs that are principal affiliates of medical schools are more likely to plan a decrease, while Veterans Administration directors are more likely to plan an increase in program size. The reason residency directors cited most frequently as important to their plans to increase program size was a perceived shortage of internists. Fellowship directors most frequently cited the need for fellows in clinical research. Stipend availability was the most important factor that influenced plans to decrease program size. Overall, residency and fellowship directors planned to increase the size of their programs around 1%. Program directors and others in the internal medicine community should consider how they can change the stipend availability, admissions criteria, and other incentives to channel trainees into the areas of greatest potential need and demand for the profession.

Psychiatric and neuropsychological response to propranolol in Graves' disease

We describe the endocrine, psychiatric, and neuropsychological assessments of 10 untreated, newly diagnosed Graves' disease subjects who were studied longitudinally at three stages: hyperthyroid (stage 1), after 2 weeks of propranolol treatment (stage 2), and after 6 months of antithyroid treatment (stage 3). Major depression, generalized anxiety disorder, and hypomania were diagnosed at stage 1. Elevations on psychiatric symptom rating scales and in motor activity monitoring at stage 1 were significantly decreased at stage 2 and again at stage 3. Psychiatric improvements paralleled improvements in endocrine symptoms. Neuropsychological improvements were noted on the more challenging memory and attention tasks at stage 3, whereas propranolol treatment was not associated with changes on attention tests. Results are discussed in relation to catecholamine-thyroid hormone interactions, in particular, the beta-adrenergic system.

Symptom rating scale for assessing hyperthyroidism

A hyperthyroid symptom scale (HSS) was designed and administered to ten subjects with untreated Graves' disease. All subjects had clinical and chemical evidence of hyperthyroidism and reproducible HSS scores of 20 or more points. During sequential treatments with propranolol hydrochloride (phase 2) followed by propylthiouracil (phase 3) there was a significant decline in the HSS scores at each phase. Accompanying the decrease in HSS scores was a decrease in heart rate, but there was no change in thyroid function test results at phase 2 and a decrease in heart rate, thyroid function test results, and goiter size at phase 3. This new scale includes ten categories of symptoms, it is sensitive to changes in both the adrenergic and metabolic components of hyperthyroidism, and it is useful in the clinical assessment and management of patients with thyrotoxicosis.

A psychiatric and neuropsychological study of patients with untreated Graves' disease

We studied 13 untreated Graves' disease subjects in a clinical research unit using endocrine, psychiatric, and neuropsychological assessments. We used SADS interviews, RDC, standardized symptom rating scales, and motor activity monitoring to update earlier studies and quantified psychiatric symptoms to elucidate any correlations between endocrine and psychiatric status. Nine of 13 subjects had major depression, 8/13 had generalized anxiety disorder, and 3/13 were hypomanic. Anxiety levels were much higher than in other hospitalized medical patients. Using a broad battery of neuropsychological testing, we found mild deficits in attention, memory, and complex problem solving that were consistent with previous studies of hyperthyroid patients. The severity of psychiatric symptoms could easily result in an inappropriate referral to a psychiatrist prior to the diagnosis of hyperthyroidism. The relationship between psychiatric symptoms and possible CNS effects of excess levels of thyroid hormone is discussed.

National Study of Internal Medicine Manpower: XI. Internal medicine residency and fellowship training in the 1980s

The number of residents beginning training in internal medicine continued to increase slightly in 1985-86. However, the total number of residents in internal residency training decreased slightly from the previous year due to a decrease in the number of second- and third-year residents. The proportion of first-year residents who were foreign-trained physicians decreased from 21% to 20%, and the proportion of residents who finished training and went on to subspecialty training in 1985 decreased substantially to 56%. The number of physicians entering residency and fellowship training in internal medicine considerably exceeds the number projected by the Graduate Medical Education National Advisory Committee. In this article, we discuss implications of these trends for medical education and practice.

National Study of Internal Medicine Manpower: X. Internal medicine residency and fellowship training: 1985 update

The number of medical school graduates entering internal medicine residency training was at an all-time high in 1984-85. Although the number of first-year residents who were foreign-trained physicians did not differ greatly from the 1983-84 census, the number of first-year residents who were U.S. medical school graduates was much higher than the previous year largely because the number of graduates from U.S. medical schools increased substantially in 1984. The number of internal medicine fellowship programs and the number of fellows in 1984-85 were also at an all-time high. Foreign-trained physicians represent 22% of those in residency training and 20% of those in fellowship training. Of every 100 who completed residency training, 61 went on to a first year of subspecialty fellowship training, a number up slightly from the previous year. The increasing numbers of residents and fellows being trained in internal medicine, combined with the preference for subspecialization and the substantial proportion of foreign-trained physicians being trained, are discussed against the background of pending legislation to reduce federal assistance for graduate medical education.

Research activities of faculty in academic departments of medicine

To assess the involvement of current medical faculty in research, a research activities questionnaire and a faculty roster form were sent to all full-time, salaried faculty of departments of medicine in medical schools in the United States. Valid responses from 7483 faculty members were received from 119 medical schools. About 88% of respondents are men; 83% have M.D. degrees; 8% have a Ph.D. degree; and 7% have both degrees. Twenty-four percent of the faculty who have done research had little preparation for a research career. However, 45% of faculty with M.D. degrees had 2 or more years of research training. Seventy-seven percent of faculty with only an M.D. degree reported research activity from 1982 to 1983; the median effort of all faculty with an M.D. is 25%. Faculty with both degrees are more involved in research and the median effort for those with a Ph.D. is 95%.

Influence of clofibrate on thyroid hormone and muscle protein turnover

Clofibrate, a hypolipidemic agent, has been shown to increase muscle protein degradation. The possible role of thyroid hormones in this phenomena was examined. Clofibrate treatment of rats for 2 weeks resulted in a significant decrease in total thyroxine and triiodothyronine levels in serum. Reverse T3 and resin uptake values remained unchanged. When exogenous thyroxine was co-administered with clofibrate, serum TSH levels were suppressed, but the increased muscle protein degradation was not reversed. Equilibrium dialysis and Scatchard analysis of the binding of 125I-thyroxine to serum proteins indicated that clofibrate competitively inhibits the binding of thyroid hormone to serum proteins by decreasing its apparent binding affinity. In the presence of lower total thyroid hormone concentrations and an elevated free thyroxine fraction, the total free hormone levels are estimated to be in the normal range in the serum of clofibrate treated rats. Clofibrate seems to act like thyroid hormone since it binds to and displaces T4 from plasma proteins. Because free thyroid hormone levels are in the normal range, the thyroid hormone-like effects of clofibrate on the cell may be additive to the T4 effects, and are probably responsible for the hypermetabolic state seen in the muscle of clofibrate-treated animals. Our data suggest that the effects of clofibrate in muscle are complex. In addition to competitively altering the binding of thyroxine to serum proteins, this substance may also exert a hitherto unrecognized thyroid-hormone-like subcellular effect resulting in increased muscle protein degradation, and in augmented ouabain-sensitive ATPase activities.

Unusual manifestations of hypothyroidism

Thyroid hormone exerts direct effects on essentially all of the organ systems of the body. Hypothyroidism is a frequently diagnosed endocrine disorder that has characteristic clinical signs and symptoms. In addition to these common manifestations, however, there are many additional manifestations of hypothyroidism that are less commonly acknowledged and include involvement of the hematologic, muscular, cardiac, and rheumatologic systems. It is important to recognize that these other organ systems may be involved and that the resulting disease states can dominate the clinical picture. As with the classic manifestations of hypothyroidism, these unusual manifestations respond to thyroid hormone replacement therapy. Thus, the importance of recognizing these signs and symptoms, as a result of hypothyroidism, is evident. This article emphasizes these less common manifestations of the patient with hypothyroidism, and, in addition, discusses the possible pathophysiologic mechanisms by which thyroid hormone deficiency can lead to organ system dysfunction.

Pseudopseudohypoparathyroidism and pheochromocytoma. Association or coincidence?

We saw a patient who had a pheochromocytoma producing hypertension along with clear evidence of pseudopseudohypoparathyroidism (PPHP). Although PPHP does not have the biochemical features of hypocalcemia and elevated parathyroid hormone levels as seen in pseudohypoparathyroidism, it seems from this case to share the potential for multiple endocrine neoplasia seen in a number of metabolic disorders in which pheochromocytoma may be a prominent manifestation.

A prospective evaluation and follow-up of patients with syncope

We prospectively evaluated and followed 204 patients with syncope to determine how often a cause of syncope could be established and to define the prognosis of such patients. A cardiovascular cause was established in 53 patients and a noncardiovascular cause in 54. The cause remained unknown in 97 patients. At 12 months, the overall mortality was 14 +/- 2.5 per cent. The mortality rate (30 +/- 6.7 per cent) in patients with a cardiovascular cause of syncope was significantly higher than the rate (12 +/- 4.4 per cent) in patients with a noncardiovascular cause (P = 0.02) and the rate (6.4 +/- 2.8 per cent) in patients with syncope of unknown origin (P less than 0.0001). The incidence of sudden death was 24 +/- 6.6 per cent in patients with a cardiovascular cause, as compared with 4 +/- 2.7 per cent in patients with a noncardiovascular cause (P = 0.005) and 3 +/- 1.8 per cent in patients with syncope of unknown origin (P = 0.0002). Patients with syncope can be separated into diagnostic categories that have prognostic importance. Patients with a cardiovascular cause have a strikingly higher incidence of sudden death than patients with a noncardiovascular or unknown cause.

Clofibrate does not alter cyclic nucleotide metabolism in muscle

Clofibrate is a hypolipidemic agent that causes muscle protein breakdown in rats, and an acute muscular syndrome in man. It also inhibits adenylate cyclase in fat tissue. Muscle protein metabolism has been shown to be regulated by cyclic nucleotides. In the present experiments were measured several parameters of cyclic nucleotide metabolism to determine the role that cyclic nucleotides play in clofibrate-induced muscle protein degradation. It was found that clofibrate treatment did not alter cyclic nucleotide levels, nor did it change the activities of basal or hormone-stimulated adenylate cyclase, or cyclic nucleotide phosphodiesterase in muscle. Our results suggest that muscle protein breakdown in clofibrate-treated rats is not regulated by cyclic nucleotides.