Clinical Focus

  • Cardiovascular Disease

Academic Appointments

Professional Education

  • Board Certification: National Board of Echocardiography, Adult Echocardiography (2019)
  • Fellowship: University of California San Francisco Registrar Office CA
  • Board Certification: American Board of Internal Medicine, Cardiovascular Disease (2020)
  • Fellowship: Kaiser Foundation Hospital San Francisco (2020) CA
  • Board Certification: American Board of Internal Medicine, Internal Medicine (2017)
  • Residency: UC Davis Internal Medicine Residency (2017) CA
  • Medical Education: University of Cincinnati College of Medicine Registrar (2014) OH

All Publications

  • QT Interval Dynamics and Cardiovascular Outcomes: A Cohort Study in an Integrated Health Care Delivery System Journal of the American Heart Association Mantri, N. M., Lu, M., Zaroff, J., Risch, N., Hoffman, T., Oni-Orisan, A., Lee, C., Jorgenson, E., Iribarren, C. 2021

    View details for DOI 10.1161/JAHA.120.018513

  • Intraprocedural direct left atrial and wedge pressure correlation during transcatheter mitral valve repair: Results from a single center registry CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS Chen, L., Mantri, N., Eng, M. L., Wung, W., Smith, T. R., Stripe, B. R., Fan, D., Boyd, W. D., Low, R. I., Rogers, J. H., Singh, G. D. 2019; 94 (1): 165-170


    This study investigates the correlation of occlusive wedge pressure (WP) with direct left atrial (LA) pressure in patients with severe mitral regurgitation (MR) undergoing transcatheter mitral valve repair (TMVr) with MitraClip.There is interest in acquiring objective hemodynamic parameters for intraprocedural guidance in patients undergoing MitraClip.The study included 94 patients with severe MR at prohibitive surgical risk who underwent MitraClip at the University of California Davis Medical Center between 2014 and 2016.An average of 1.8 ± 0.7 clips were used to achieve MR grade of 2+ or less in 99% of patients. Correlation analysis of all (n = 236) pre-clip, inter-clip, and final-clip WP and LA pressures yielded a Pearson's R (r) of 0.85 and 0.79 for mean WP vs mean LA and WP V vs LA V, respectively. Median LA V to mean LA ratio (LAV:mLA) was 1.75 (IQR 1.5-1.9). 79% (n = 74) of patients had LAV:mLA ratio ≥ 1.5 with associated WP V vs LA V correlation (r) of 0.83. In patients with LAV:mLA ratio < 1.5, the correlation (r) was 0.69. Baseline characteristics were not significantly different between patients with LAV:mLA ratio ≥ 1.5 and patients with LAV:mLA ratio < 1.5. Post-procedure, median LA V: mean LA ratio decreased from 1.75 to 1.4, P = 0.0001.Correlation between WP and direct LA pressure in patients with severe MR undergoing Mitraclip is modest. Caution is advised when using WP to approximate LA pressure intraprocedurally, especially in patients with baseline low LAV:mLA ratios.

    View details for DOI 10.1002/ccd.28035

    View details for Web of Science ID 000474638500030

    View details for PubMedID 30588751

  • Power Failure: Acromegalic Cardiomyopathy. The American journal of medicine Mantri, N. M., Amsterdam, E. n., Tan, M. n., Singh, G. D. 2016

    View details for PubMedID 27039953