Researcher:
Bertelsen, Nathan

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Faculty Member

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Nathan

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Bertelsen

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Bertelsen, Nathan

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2015 - 20207

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Researcher Of Publications: search.filters.isAuthorOfPublication.b351ccaa-6d6c-4574-ad11-efa0ffbc2e13

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    Clinical value of ambulatory blood pressure: is it time to recommend for all patients with hypertension?
    (Springer, 2016) Solak, Yalcin; Kario, Kazuomi; Covic, Adrian; Afsar, Baris; Ozkok, Abdullah; Wiecek, Andrzej; N/A; Bertelsen, Nathan; Kanbay, Mehmet; Faculty Member; Faculty Member; School of Medicine; School of Medicine; N/A; 110580
    Hypertension is a very common disease, and office measurements of blood pressure are frequently inaccurate. Ambulatory Blood Pressure Monitoring (ABPM) offers a more accurate diagnosis, more detailed readings of average blood pressures, better blood pressure measurement during sleep, fewer false positives by detecting more white-coat hypertension, and fewer false negatives by detecting more masked hypertension. ABPM offers better management of clinical outcomes. For example, based on more accurate measurements of blood pressure variability, ABPM demonstrates that taking antihypertensive medication at night leads to better controlled nocturnal blood pressure, which translates into less end organ damage and fewer clinical complications of hypertension. For these reasons, albeit some shortcomings which were discussed, ABPM should be considered as a first-line tool for diagnosing and managing hypertension.
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    Primary care screening methods and outcomes for asylum seekers in New York City
    (Springer, 2018) Selden, Elizabeth; Krass, Polina; Keatley, Eva S.; Keller, Allen; N/A; Bertelsen, Nathan; Faculty Member; School of Medicine; N/A
    Effective screening in primary care among asylum-seekers in the US is critical as this population grows. This study aimed to evaluate disease prevalence and screening methods in this high-risk group. Two hundred ten new clients from 51 countries, plus Tibet, who were accepted into a program for asylum seekers from 2012 to 2014 were included. Screening rates and outcomes for infectious, non-communicable, and mental illnesses were evaluated. Screening rates were highest for PTSD, depression, hepatitis B, and latent tuberculosis. Seventy-one percent of clients screened positive for depression and 55 % for PTSD, followed by latent tuberculosis (41 %), hypertension (10 %), hepatitis B (9.4 %), and HIV (0.8 %). Overall screening rates were high. Point of care testing was more effective than testing that required a repeat visit. A large psychiatric and infectious disease burden was identified. These findings can inform future primary care screening efforts for asylum seekers in the US.
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    Teaching medical students in English in a non-English speaking country: evaluation of a global health elective for us residents in Turkey
    (Wiley-Blackwell, 2015) Cocks, P.; Bertelsen, Nathan; Demirhan, Mehmet; Faculty Member; Faculty Member; School of Medicine; School of Medicine; N/A; 9882
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    War and displacement stressors and coping mechanisms of syrian urban refugee families living in Istanbul
    (American Psychological Association (APA), 2020) Arenliu, Aliriza; Saad, Rahaf; Abdulaziz, Hussam; Weine, Stevan Merrill; Bertelsen, Nathan; Faculty Member; School of Medicine; N/A
    The overall purpose of this study was to achieve a contextual understanding of war and displacement stressors and coping mechanisms among urban refugee families from Syria living in Istanbul. This study was informed primarily by Walsh's family resilience framework and Weine's Family Consequences of Refugee "frauma empirical model. Qualitative family interviews were conducted with a purposive sample of 30 Syrian refugee families from the capa and Esenler neighborhoods of Istanbul. Data were analyzed using a grounded theory approach and Atlas/ti software. The analysis identified a total of 21 war and displacement stressors for families across 3 categories: (a) Surviving war and border crossing; (b) Living as urban refugees, and; (c) Parenting children in refuge. The analysis also identified a total of 16 coping mechanisms for families across 4 themes: (a) Flexible and reciprocal family organization; (b) Hopeful family beliefs and communication; (c) Staying connected with family in Syria and in exile, and; (d) Making the best of living in a new country. These findings underlie the need for several practice and policy priorities including: (a) Increasing the number of children attending Turkish schools and decreasing child labor; (b) Incorporating faith into psycho-social and mental health interventions. and; (c) Developing family focused interventions conducted by community-based lay providers that draw upon empirical models of family stressors and coping.
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    The role of plasma triglyceride/high-density lipoprotein cholesterol ratio to predict new cardiovascular events in essential hypertensive patients
    (Wiley, 2016) Turak, Osman; Afsar, Baris; Ozcan, Firat; Oksuz, Fatih; Mendi, Mehmet Ali; Yayla, Cagri; Covic, Adrian; N/A; Kanbay, Mehmet; Bertelsen, Nathan; Faculty Member; Faculty Member; School of Medicine; School of Medicine; 110580; N/A
    Triglyceride (TG) to high-density lipoprotein cholesterol (HDL-C) ratio (TG/HDL-C) has been suggested as a simple method to identify unfavorable cardiovascular outcomes in the general population. The effect of the TG/HDL-C ratio on essential hypertensive patients is unclear. About 900 consecutive essential hypertensive patients (mean age 52.9 +/- 12.6 years, 54.2% male) who visited our outpatient hypertension clinic were analyzed. Participants were divided into quartiles based on baseline TG/HDL-C ratio and medical records were obtained periodically for the occurrence of fatal events and composite major adverse cardiovascular events (MACEs) including transient ischemic attack, stroke, aortic dissection, acute coronary syndrome, and death. Participants were followed for a median of 40 months (interquartile range, 35-44 months). Overall, a higher quartile of TG/HDL-C ratio at baseline was significantly linked with higher incidence of fatal and nonfatal cardiovascular events. Using multivariate Cox regression analysis, plasma TG/HDL-C ratio was independently associated with increased risk of fatal events (hazard ratio [HR], 1.25; 95% confidence interval [CI], 1.13-1.37; P <=.001] and MACEs (HR, 1.13; 95% CI, 1.06-1.21; P <=.001). Increased plasma TG/HDL-C ratio was associated with more fatal events and MACEs in essential hypertensive patients.
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    A new risk factor for cardiovascular disease and associated risk factors: education
    (Wiley-Blackwell, 2015) N/A; N/A; Bertelsen, Nathan; Kanbay, Mehmet; Faculty Member; Faculty Member; School of Medicine; School of Medicine; N/A; 110580
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    PublicationOpen Access
    Teaching global health with simulations and case discussions in a medical student selective
    (BioMed Central, 2016) DallaPiazza, M.; Hopkins, M.A.; Ogedegbe, G.; DallaPiazza, M.; Hopkins, M.A.; Ogedegbe, G.; N/A; Bertelsen, Nathan; Faculty Member; School of Medicine
    Background: Among US medical schools, demand for Global Health (GH) programs continues to grow. At the same time, cultural competency training has become a priority for medical students who will care for an increasingly diverse US patient population. We describe a pilot period for a new GH Selectivedesigned to introduce medical students to global medicine and enhance culturally-sensitive communication skills. Methods: As a 4-week clinical clerkship, the GH Selective was offered annually over a three-year period to a total of 33 students. Activities included clinical assignments, cultural competency and clinical skills simulations, patient case discussions in tropical medicine, journal clubs, and lectures. Faculty assessments of student performance and student evaluations of course content were focused on 6 course objectives, adapted from standardized GH objectives. Results: For each offering of the GH Selective, at least 40 faculty members and fellows volunteered over 200 teaching hours from 11 medical school departments. Student feedback was consistently positive through competency-based curricular evaluations. As a result of its successes, the course is now offered on a biannual basis. Discussion: Experiential, student-centered teaching employed in this course proved successful as an introduction to delivery of evidence-based and culturally sensitive GH. Special emphasis on working with standardized patients in interdisciplinary and cross-cultural simulations provided students with clinical skills applicable for care provided both locally and on international rotations. Conclusion: With a special emphasis on cross-cultural sensitivity, this pilot elective trained future practitioners in fund of knowledge, clinical skills, and service delivery methods in GH.