Johanna Contreras

Dr. Johanna Contreras


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 December 2018 in Clinical Cardiology
Verified
Journal Article
Open access
PDF file
JCJohanna Contreras
Johanna Contreras
KHKimberly N. Hong
Kimberly N. Hong
JCJavier Castillo
Javier Castillo
LMLucas N. Marzec
Lucas N. Marzec
JHJonathan C. Hsu
Jonathan C. Hsu
TMThomas M. Maddox
Thomas M. Maddox
Background: In non‐valvular atrial fibrillation (NVAF) patients, congestive heart failure (CHF) confers an increased risk of stroke or systemic thromboembolism. This risk is present in both heart failure (HF) with reduced ejection fraction (HFrEF) and HF with preserved ejection fraction (HFpEF). It is unclear if clinicians account for both types of CHF in their NVAF anticoagulation practices. Accordingly, we characterized current outpatient anticoagulation trends in NVAF patients with HFpEF compared to patients with HFrEF.Methods: The outpatient NCDR PINNACLE‐AF registry was analyzed to identify patients with NVAF and CHF. The study population was subdivided into HFpEF (ie, LVEF ≥ 40%) and HFrEF (LVEF < 40%). Anticoagulation rates by CHF group were compared and stratified by CHA2DS2‐VASc score.Results: A total of 340 127 patients with NVAF and CHF were identified, of whom 248 136 (73.0%) were classified as HFpEF and 91 991 (27.0%) as HFrEF. Patients with HFpEF had higher mean CHA2DS2‐VASc scores and were more likely to be female, older, and have hypertension (P < 0.001). Unadjusted anticoagulation rates were significantly lower in patients with HFpEF compared to those with HFrEF (60.6% vs 64.2%, respectively). Lower rates of anticoagulation in the HFpEF group persisted after risk adjustment (RR: 0.93 [95% CI: 0.91, 0.94]). Stratification by CHA2DS2‐VASc score demonstrated that lower rates of anticoagulation in patients with HFpEF persisted until a score of ≥5.Conclusions: Patients with NVAF and HFpEF have significantly lower anticoagulation rates when compared to their HFrEF counterparts. These findings suggest a potential underappreciation of HFpEF as a risk factor in patients with NVAF.

15 June 2023 in Cardiovascular Drugs and Therapy
Verified
Journal Article
Closed access
PDF file
MPMaeve Soto Pérez
Maeve Soto Pérez
JRJorge Rodríguez-Capitán
Jorge Rodríguez-Capitán
JRJuan Antonio Requena-Ibáñez
Juan Antonio Requena-Ibáñez
CSCarlos G. Santos-Gallego
Carlos G. Santos-Gallego
MZMohammad Urooj Zafar
Mohammad Urooj Zafar
Juan J. BadimonJuan J. Badimon
Juan J. Badimon

4 January 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
JCJohanna Contreras
Johanna Contreras
JNJeremy Nussbaum
Jeremy Nussbaum
PCPeter Cangialosi
Peter Cangialosi
STSahityasri Thapi
Sahityasri Thapi
ARAnkitha Radakrishnan
Ankitha Radakrishnan
ASAlejandro Folch Sandoval
Alejandro Folch Sandoval
Minoritized racial and ethnic groups suffer disproportionately from the incidence and morbidity of pulmonary hypertension (PH), as well as its associated cardiovascular, pulmonary, and systemic conditions. These disparities are largely explained by social determinants of health, including access to care, systemic biases, socioeconomic status, and environment. Despite this undue burden, minority patients remain underrepresented in PH research. Steps should be taken to mitigate these disparities, including initiatives to increase research participation, combat inequities in access to care, and improve the treatment of the conditions associated with PH.

12 September 2023 in Current Cardiology Reports
Verified
Journal Article
Closed access
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Estefania OliverosEstefania Oliveros
Estefania Oliveros
CGClara Inés Saldarriaga Giraldo
Clara Inés Saldarriaga Giraldo
JHJillian Hall
Jillian Hall
ETElizabeth Tinuoye
Elizabeth Tinuoye
MRMaria Juliana Rodriguez
Maria Juliana Rodriguez
JCJohanna Contreras
Johanna Contreras

1 October 2025 in Circulation: Heart Failure
Verified
Journal Article
Closed access
ANAndriana P. Nikolova
Andriana P. Nikolova
LBLavanya Bellumkonda
Lavanya Bellumkonda
ABAnju Bhardwaj
Anju Bhardwaj
NFNadia Fida
Nadia Fida
LHLuise Holzhauser
Luise Holzhauser
JCJohanna Contreras
Johanna Contreras
Induction therapy is the use of potent immunosuppression in the perioperative period with the intent to diminish rejection rates in at-risk patients or as a renal-protective strategy. The potent immunomodulatory effects of these agents must be balanced against the recipient’s risk of infectious or malignant complications, among others. There is a notable lack of clinically useful risk stratification models that integrate these competing risks and guide the clinician in the use of these therapies. This review integrates the existing evidence on the utility and safety of various induction regimens and highlights the gaps of knowledge in the field. In addition, we frame the discussion in view of the changing landscape of heart transplantation where many unknowns remain, such as the impact of induction immunosuppression on patients bridged with mechanical circulatory devices or receiving organs from hepatitis C–positive or donation after circulatory death donors, among others.