Browse Health
Emergency Physician, Internist
17 years of experience
Accepting new patients


Education ?

Medical School Score Rankings
Yeshiva University (1995)
Top 50%

Awards & Distinctions ?

American Board of Emergency Medicine

Affiliations ?

Dr. Katz is affiliated with 1 hospitals.

Hospital Affiliations



  • Maricopa Medical Center
    2601 E Roosevelt St, Phoenix, AZ 85008
  • Publications & Research

    Dr. Katz has contributed to 14 publications.
    Title Rapidly Fatal Infections.
    Date June 2008
    Journal Emergency Medicine Clinics of North America

    Emergency physicians are trained to separate "sick" from "not sick" patients during their training. Nevertheless, every emergency physician will face situations in which early intervention is critical to their patient's outcome. Infectious diseases are responsible for many of these potentially poor outcomes. This article discusses early identification and treatment for several rapidly fatal infections, including two newly identified travel-related illnesses.

    Title Depression Among Emergency Medicine Residents over an Academic Year.
    Date April 2006
    Journal Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine

    OBJECTIVES: To describe the frequency of depression among emergency medicine (EM) residents by month, gender, rotation type, postgraduate year (PGY), and number of hours worked. METHODS: This was a prospective, nonblinded, cohort study of consenting EM residents in a four-year, 51-resident EM residency program from July 2003 to June 2004. Participants received an anonymous monthly survey via Web site that consisted of the Center for Epidemiologic Studies Depression Scale (CESD) and the resident's gender, PGY, number of hours worked in the previous week (< or =40, 41-60, 61-80 and >80), and rotation type (EM, intensive care unit, non-EM clinical, or other). Residents were excluded from analysis if they did not complete at least one survey during each season. For each resident, the peak score for each three-month period was recorded and analyzed with a mixed-model analysis of variance to account for a repeated-measures effect. RESULTS: Fifty of 51 (98.0%) residents consented for participation. Nineteen (38%) were excluded because of incomplete data. The prevalence of depression was 12.1% (95% confidence interval [95% CI] = 7.5% to 19.0%; 15 of 124 scores). The women had numerically, but not statistically, significantly lower mean +/- standard deviation CESD scores than the men (6.4 +/- 6.8 vs. 8.7 +/- 8.6, p = 1.0). There was no significant difference in mean CESD score by month, PGY, rotation type, or number of hours worked. CONCLUSIONS: Season, number of hours worked, rotation type, PGY, and gender all failed to predict depression among EM residents in this single-center trial. The prevalence of depression was comparable to that of the general population.

    Title Identifying Inaccuracies on Emergency Medicine Residency Applications.
    Date January 2006
    Journal Bmc Medical Education

    BACKGROUND: Previous trials have showed a 10-30% rate of inaccuracies on applications to individual residency programs. No studies have attempted to corroborate this on a national level. Attempts by residency programs to diminish the frequency of inaccuracies on applications have not been reported. We seek to clarify the national incidence of inaccuracies on applications to emergency medicine residency programs. METHODS: This is a multi-center, single-blinded, randomized, cohort study of all applicants from LCME accredited schools to involved EM residency programs. Applications were randomly selected to investigate claims of AOA election, advanced degrees and publications. Errors were reported to applicants' deans and the NRMP. RESULTS: Nine residencies reviewed 493 applications (28.6% of all applicants who applied to any EM program). 56 applications (11.4%, 95%CI 8.6-14.2%) contained at least one error. Excluding "benign" errors, 9.8% (95% CI 7.2-12.4%), contained at least one error. 41% (95% CI 35.0-47.0%) of all publications contained an error. All AOA membership claims were verified, but 13.7% (95%CI 4.4-23.1%) of claimed advanced degrees were inaccurate. Inter-rater reliability of evaluations was good. Investigators were reluctant to notify applicants' dean's offices and the NRMP. CONCLUSION: This is the largest study to date of accuracy on application for residency and the first such multi-centered trial. High rates of incorrect data were found on applications. This data will serve as a baseline for future years of the project, with emphasis on reporting inaccuracies and warning applicants of the project's goals.

    Title Inaccuracies on Applications for Emergency Medicine Residency Training.
    Date November 2004
    Journal Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine

    OBJECTIVES: Studies have shown erroneous claims of authorship by medical students applying for residency. Authors have hypothesized that investigation of advanced degrees, Alpha Omega Alpha (AOA) status, and peer-reviewed publications all show important rates of inaccuracy. METHODS: A retrospective review of all applicants offered an interview for the authors' emergency medicine (EM) residency (entering class of 2002), excluding foreign medical graduates and current residents, was conducted. After verifying peer-reviewed publications by MEDLINE search and journal review, errors were tabulated as follows: reference not found, not referenced as an abstract, incorrect author list, or clerical error. AOA status was verified by the AOA organization. Advanced degrees were verified by the awarding institutions. RESULTS: Of 194 applications screened (58.3% of applications), 21 (10.8%) were excluded (9 foreign medical graduates, 12 current residents). Multiple inaccuracies on a single application were counted separately. Of the 173 remaining applications, 23 (13.3%; 95% confidence interval [95% CI] = 8.8% to 19.5%) had at least one misrepresentation and seven of 173 (4.0%; 95% CI = 1.8% to 8.5%) had two or more. Authorship of at least one peer-reviewed article was claimed by 47 of 173 (27.2%), with ten of 47 (21.3%; 95% CI = 11.2% to 36.1%) having one inaccuracy and six of 47 (12.8%, 95% CI = 5.3% to 26.4%) having two or more. AOA membership was claimed by 14 applicants (8.1%), but five claims (35.7%, 95% CI = 14.0% to 64.4%) were inaccurate. Advanced degrees were claimed by 15 (8.7%); four (26.7%, 95% CI = 8.9% to 55.2%) were in error. CONCLUSIONS: Applications for EM residency contain frequent inaccuracies in publications listed, AOA status, and advanced degrees. Careful review of applications is necessary to ensure appropriate credit is given for claims of these types.

    Title Predictors of Outcome in Geriatric Patients with Urinary Tract Infections.
    Date October 2004
    Journal The Journal of Emergency Medicine

    A study was conducted to determine the prognosis of geriatric patients with urinary tract infections (UTIs) and identify clinical factors associated with adverse outcomes. This retrospective, cohort study identified elderly patients (age > or =65 years) presenting to an academic, urban Emergency Department (ED) during a 16-week period with UTI, suggested by urinalysis and pertinent symptoms. There were 37 demographic and clinical variables analyzed as potential predictors of outcome. Morbidity was defined as in-hospital death, Intensive Care Unit (ICU) admission, hospital length of stay (LOS) >2 days, or hospital intravenous (i.v.) antibiotics >2 days. Factors identified by univariate analysis were combined using multiple logistic regression to identify independent predictors of morbidity. There were 284 patients who met selection criteria. Thirteen patients (4.6%) died during hospitalization and 27 (9.5%) had ICU admission, 139 (48.9%) had LOS >2 days, and 75 (26.4%) had i.v. antibiotics >2 days. Multivariate analysis identified the following variables as independent predictors of adverse outcomes: mental status change, frequent UTIs, other nonurinary infections, abnormal temperature, tachycardia, hypotension, elevated BUN, hyperglycemia, elevated WBC, and relative neutrophilia. Regression models for adverse outcomes had sensitivities from 74.8% to 96.2% and specificities from 31.1% to 69.0%. In conclusion, this study defines high rates of morbidity for geriatric patients with UTIs and describes predictive variables that may help identify low-risk patients. These data may lay the foundation for determining specific guidelines for disposition of this high-risk patient population.

    Title Change of Shift. Checking My Pulse.
    Date September 2004
    Journal Annals of Emergency Medicine
    Title Careers of Graduates of Combined Emergency Medicine/internal Medicine Programs.
    Date March 2003
    Journal Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine

    In 1991, the American Boards of Internal Medicine and Emergency Medicine changed their credentialing requirements to recognize training common to both disciplines. This allowed the formation of a five-year track for dual board eligibility. From 1995 to 1998, 28 physicians graduated from eight emergency medicine/internal medicine (EM/IM) programs. This study was an analysis of career outcomes of these graduates. OBJECTIVES: To document career outcomes of EM/IM program graduates, establish a baseline for future studies of EM/IM graduates, and elucidate the role of EM/IM graduates in medicine. METHODS: The 28 EM/IM graduates were mailed a written questionnaire. Endpoints assessed included practice fields, practice environments, ongoing research, publications, academic appointments, board examination scores, career satisfaction, and career goals. RESULTS: Surveys were obtained from 23 of 28 (82.1%) graduates. Seven (30.4%) practice EM and IM, 15 (65.2%) practice EM exclusively, and one (4.3%) practices IM exclusively. Twelve (52.2%) are involved in research. The graduates authored a total of 30 papers or chapters. Ten (43.5%) currently work in administrative positions, but many more aspire to. The most common reasons for having chosen an EM/IM program are to be a better physician (22/23, 95.7%), to practice in both fields (15/23, 65.2%), and to become better prepared for an academic career (15/23, 65.2%). The EM/IM graduates reported high career satisfaction. CONCLUSIONS: Although the majority of EM/IM graduates do not practice both IM and EM, many would prefer to. The graduates are highly satisfied with their choice of residency and career. Early in career development, the graduates appear to gravitate toward academic and leadership positions.

    Title Quantitation and Purification of Polymerase Chain Reaction Products by High-performance Liquid Chromatography.
    Date March 1997
    Journal Molecular Biotechnology

    This work describes the application of the fully automated high-performance liquid chromatographic system to the analysis of PCR-amplified products. Efficient separations of both DNA restriction fragments and PCR products were performed using an anion-exchange DEAE-NPR column, packed with 2.5-microns nonporous particles. The automated HPLC method was employed for the separation, quantitation, and purification of PCR products in less than 10 min in a single step.

    Title An Electrochemiluminescence-based Detection System for Quantitative Pcr.
    Date August 1993
    Journal American Biotechnology Laboratory
    Title Rapid Separation, Quantitation and Purification of Products of Polymerase Chain Reaction by Liquid Chromatography.
    Date December 1990
    Journal Journal of Chromatography

    The polymerase chain reaction (PCR), a new, powerful method for rapid enzymatic amplification of specific DNA fragments, has gained tremendous popularity in molecular biology. This paper describes the successful application of liquid chromatography to the analysis of products of the PCR. Efficient separation of both DNA restriction fragments and amplified PCR products were achieved in 10-12 min on a new ion-exchange column, DEAE-NPR, packed with 2.5-microns non-porous particles. The PCR products were quantitated with a reproducibility within 10%. Use of liquid chromatography was demonstrated for separation and quantitation of PCR products in amounts below those required for direct analysis by ethidium bromide gel electrophoresis or a Hoechst 33258 dye-based fluorescence assay. Liquid chromatography was also demonstrated to be effective for quick optimization of PCR procedures.

    Title Rapid Analysis and Purification of Polymerase Chain Reaction Products by High-performance Liquid Chromatography.
    Date July 1990
    Journal Biotechniques

    This report describes the use of high-performance liquid chromatography (HPLC) for the rapid analysis and purification of the polymerase chain reaction products. Employing a new anion-exchange nonporous column, efficient separations of both DNA restriction fragments and amplified PCR products are achieved in 10 to 20 minutes and quantitated within +/- 10%. The performance of the HPLC technique is described in terms of resolution, reproductibility, sensitivity and micropreparative capability and compared to that of gel electrophoresis for this application.

    Title Muscarinic Actions and Receptor Binding of the Enantiomers of Bm 130, an Alkylating Analog of Oxotremorine.
    Date May 1989
    Journal The Journal of Pharmacology and Experimental Therapeutics

    The enantiomers of the oxotremorine analog N-[4-(2-chloromethylpyrrolidine)-2-butynyl]-2-pyrrolidone (BM 130) were synthesized. The LD50 values of (+)- and (-)-BM 130 in mice (i.v.) were 10.4 +/- 1.4 and 13.5 +/- 1.9 mumol/kg, respectively. Atropine and N-methylatropine poorly protected against the lethal effects, suggesting that they were nonmuscarinic in nature. When administered i.v. to mice, (+)- and (-)-BM 130 were equipotent in producing peripheral and central muscarinic effects. ED50 values were 1.3 to 1.4, 2.8 to 3.2 and 0.20 to 0.26 mumol/kg, respectively, for salivation, tremor and analgesia (tail-flick assay). After i.p. injection, tremor was not observed and analgesic potency was reduced more than 10-fold compared to the i.v. route. The aziridinium ions [(+)- and (-)-BM 130A], formed by spontaneous cyclization of (+)- and (-)-BM 130, were virtually equipotent in eliciting contractions of the isolated guinea pig ileum and in causing salivation in mice. Their LD50 values in mice (i.v.) were 1.1 +/- 0.2 and 2.1 +/- 0.3 mumol/kg, respectively. The enantiomers of BM 130A had similar affinity for muscarinic receptors in the rat cerebral cortex as measured by competitive inhibition of (-)-[3H]N-methylscopolamine binding at 0 degrees C. The rate constants for alkylation of muscarinic receptors, obtained at 37 degrees C by measuring the decline in (-)-[3H]-3-quinuclidinyl benzilate binding to cortical homogenates that had been treated with various concentrations of (+)- and (-)-BM 130A for 20, 45 or 90 min, differed significantly for the two enantiomers.(ABSTRACT TRUNCATED AT 250 WORDS)

    Title Alkylating Partial Muscarinic Agonists Related to Oxotremorine. N-[4-[(2-haloethyl)methylamino]-2-butynyl]-5-methyl-2-pyrrolidones.
    Date April 1989
    Journal Journal of Medicinal Chemistry

    N-[4-[(2-Chloroethyl)methylamino]-2-butynyl]-5-methyl-2-pyrrolidone (3) and N-[4-[(2-bromoethyl)methylamino]-2-butynyl]-5-methyl-2- pyrrolidone (4) were synthesized. Compounds 3 and 4 cyclized in neutral aqueous solution to an aziridinium ion (4A). The rate constants for the cyclization of 3 and 4 at 37 degrees C were 0.025 and 0.89 min-1, respectively. The aziridinium ion was equipotent with carbachol as a muscarinic agonist on the isolated guinea pig ileum. It was more potent than the corresponding 2-pyrrolidone derivative (2A) in alkylating muscarinic receptors in homogenates of the rat cerebral cortex. This higher potency was due to greater receptor affinity of 4A as compared to 2A rather than to greater rate constant for alkylation of muscarinic receptors. These properties of 3 and 4 and their low toxicity should make them valuable tools for receptor inactivation studies in vivo and in vitro.

    Title Differential Gene Expression of Soluble Cd8+ T-cell Mediated Suppression of Hiv Replication in Three Older Children.
    Journal Journal of Medical Virology

    Suppression of human immunodeficiency virus (HIV) replication by CD8+ T-cells (CD8 suppression) contributes to survival in adults and children <1 year. Soluble CD8 suppression can also be seen in some older children with AIDS. The factor responsible, CD8-derived antiviral factor (CAF), acts at the level of HIV RNA transcription. Differential gene expression techniques have been used to define the gene(s) mediating this phenomenon in adults. Recently, CAF has been linked to exosomes secreted by CD8+ T-cells. To compare the gene expression profiles from pediatric patients with each other, with those reported in 2 previous studies in adults and in those reportedly related to exosomes, we used differential gene expression to study three older children with HIV infection, one who did demonstrate soluble CD-8 suppression and two who did not. Eighteen differentially expressed genes were also seen in one adult study (P = 0.002, χ(2) test), and 38 such genes (P < 0.0001, χ(2) test) in a second adult study. In addition, two exosome components and some RNA's related to exosomal proteins were also differentially expressed. In children with HIV infection, we found significant differentially expressed genes that correlated to those previously reported in two studies in adults. Our data also lends some support to the recent identification of CAF with exosomes secreted by CD8+ T-cells.

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