Dr. Rojina  Pant  Md image

Dr. Rojina Pant Md

856 W Nelson Street Apt 1307
Chicago IL 60657
650 502-2929
Medical School: Other - Unknown
Accepts Medicare: No
Participates In eRX: No
Participates In PQRS: No
Participates In EHR: No
License #: 125.057567
NPI: 1336454040
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Pathophysiology of coronary vascular remodeling: relationship with traditional risk factors for coronary artery disease. - Cardiology in review
The relationship between cardiovascular risk factors and vascular remodeling is a relatively new area of investigation. We discuss the various mechanisms by which cardiovascular risk factors cause vascular remodeling. Endothelial dysfunction, lipoprotein alterations, inflammation, and platelet activation are the mechanisms by which remodeling occurs. Plaque composition also plays an important role in directing remodeling. Plaque with extensive calcification is more likely to undergo constrictive remodeling. Positive and negative remodeling is based on how these factors coordinate and determine the direction of remodeling. Matrix metalloproteinases perform a crucial role in vascular remodeling. Advanced glycation end-products are key substances involved in the negative remodeling associated with diabetes. Remodeling in hypertension can be either eutrophic or hypertrophic. Endothelial dysfunction and low-grade inflammation lead to negative remodeling in hypertension. Dyslipidemia can be associated with either positive or negative remodeling. High high-density lipoprotein is associated with positive remodeling and high low-density lipoprotein with negative remodeling. Smoking causes endothelial dysfunction, increased oxidative stress, and decreased nitric oxide synthesis leading to inward remodeling. Aging also causes endothelial dysfunction and predisposes to negative remodeling. Knowledge of these associations can elucidate various clinical presentations and guide therapeutic choices in the future.
Incidence and management of gastrointestinal bleeding with continuous flow assist devices. - The Annals of thoracic surgery
Continuous flow left ventricular assist devices (CF-LVADs) have emerged as the standard of care for patients in advanced heart failure (HF) requiring long-term mechanical circulatory support. Gastrointestinal (GI) bleeding has been frequently reported within this population.A retrospective analysis of 101 patients implanted with the Heart Mate II from January 2005 to August 2011 was performed to identify incidence, etiology, and management of GI bleeding. Univariate and multivariate regression analysis was conducted to identify related risk factors.A significant incidence of GI bleeding (22.8%) occurred in our predominantly destination therapy (DT) (93%) population. Fifty-seven percent of the patients with bleeding episodes bled from the upper GI (UGI) tract (with 54% bleeding from gastric erosions and 37% from ulcers/angiodysplasias), whereas 35% of patients bled from the lower GI (LGI) tract. Previous history of GI bleeding (odds ratio [OR], 22.7; 95% CI, 2.2-228.6; p=0.008), elevated international normalized ratio (INR) (OR, 3.9; CI, 1.2-12.9; p=0.02), and low platelet count (OR, -0.98; CI, 0.98 -0.99; p=0.001) were independent predictors of GI hemorrhage. Recurrent bleeding was more common in older patients (mean, 70 years; p=0.01). The majority of bleeders (60%) rebled from the same site. Management strategies included temporarily withholding anticoagulation, decreasing the speed of LVADs, and using octreotide. Octreotide did not impact the amount of packed red blood cells used, rebleeding rates, length of hospital stay, or all-cause mortality. Only 1 patient died as a direct consequence of GI bleeding.Multiple factors account for GI bleeding in patients on CF-VADs. A previous history of bleeding increases risk significantly and warrants careful monitoring.Copyright © 2012 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.

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