Patents by Inventor Rohan Dharmakumar
Rohan Dharmakumar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11696686Abstract: The invention is directed to methods for diagnosing reperfusion/non-reperfusion hemorrhage and predicting cardiac arrhythmias and sudden cardiac death in subjects comprising using imaging techniques to detect regional iron oxide deposition. The invention also provides treatment methods for subject at increased risk of sudden cardiac death.Type: GrantFiled: June 18, 2020Date of Patent: July 11, 2023Assignee: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Ivan Cokic
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Patent number: 11690524Abstract: The invention provides various methods of identifying myocardial infarction (MI) patients who have microvascular obstruction (MO), persistent microvascular obstruction (PMO), reperfusion hemorrhage, iron deposition, chronic iron deposition, and/or fat infiltration/accumulation. The invention provides various methods of identifying myocardial infarction (MI) patients who are at risk of prolonged inflammation burden in heart, adverse cardiac remodeling, electrical abnormality, mechanical abnormality, malignant cardiac arrhythmia, ischemic heart failure, and/or sudden cardiac death. The invention also provides various methods of treating these MI patients with chelation drugs, anti-inflammatory drugs, fat-lowering drugs, cooling therapies, or device therapies, or their combinations.Type: GrantFiled: June 18, 2020Date of Patent: July 4, 2023Assignee: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Ivan Cokic
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Publication number: 20230165841Abstract: Methods of treating a subject with myocardial infarction are provided, which include selective targeting time-dependent iron products at different phases of the infarction. It is discovered that during acute phase of myocardial infarction, ferrous iron in the form of heme accumulate, often followed by infarct expansion, and during the chronic phase, ferric iron in the form of crystals are dominant Chelator agents specific for ferrous iron, heme or ferric iron are demonstrated in the protection of cardiomyocytes, reduction of infarct expansion, or improving cardiac remodeling following myocardial infarction. Also provided are methods for determining the presence of intramyocardial hemorrhage by measuring plasma level of cardiac troponin before and after re-vascularization or a reperfusion therapy, which can be used to guide therapeutic treatment or intervention procedures to control the hemorrhage and mitigate infarct expansion.Type: ApplicationFiled: March 19, 2021Publication date: June 1, 2023Applicant: CEDARS-SINAI MEDICAL CENTERInventor: Rohan DHARMAKUMAR
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Publication number: 20230056088Abstract: Deoxyhemoglobin in a subject may be modulated to act as a contrast agent for use in magnetic resonance imaging. Sequential gas delivery may be applied to adjust the level of deoxyhemoglobin in the subject. A suitable magnetic resonance imaging (MRI) pulse sequence that is sensitive to magnetic field inhomogeneities, such as a blood-oxygen-level dependent (BOLD) sequence, may be used to detect deoxyhemoglobin as a contrast agent.Type: ApplicationFiled: December 31, 2020Publication date: February 23, 2023Inventors: Adrian P. CRAWLEY, Rohan DHARMAKUMAR, James DUFFIN, Joseph Arnold FISHER, David MIKULIS, Julien POUBLANC, Behzad SHARIF, Olivia SOBCZYK, Kamil ULUDAG, Chau VU, John WOOD, Hsin-Jung YANG
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Publication number: 20220412990Abstract: The invention relates to methods of cardiovascular imaging and/or measurement of blood markers for detecting, diagnosing and/or prognosing cardiac or myocardial microbleeds, especially in subject with hypertension and cardiovascular diseases. Treatment methods are also provided for subjects identified, diagnosed, prognosed, or detected with cardiac or myocardial microbleeds. In some embodiments, the subject has hypertension-induced microbleeds, but has not had a myocardial infarction or reperfusion therapy.Type: ApplicationFiled: October 30, 2020Publication date: December 29, 2022Applicants: CEDARS-SINAI MEDICAL CENTER, BOARD OF SUPERVISORS OF LOUISIANA STATE UNIVERSITY AND AGRICULTURAL AND MECHANICAL COLLEGEInventors: Rohan DHARMAKUMAR, Joseph FRANCIS
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Patent number: 11445912Abstract: The invention provides various methods for imaging a subject's cardiovascular system. The imaging method may be used to provide a diagnosis or prognosis of various cardiovascular diseases in the subject, without contrast agents or radioactive tracers, and further generating a Gaussian Mixture Model to obtain a reference value of a normal myocardium.Type: GrantFiled: September 30, 2016Date of Patent: September 20, 2022Assignee: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Hsin-Jung Yang
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Patent number: 11439309Abstract: The invention provides methods for diagnosing coronary heart disease in a subject in need thereof comprising administering an admixture comprising CO2 to a subject to reach a predetermined PaCO2 in the subject to induce hyperemia, monitoring vascular reactivity in the subject and diagnosing the presence or absence of coronary heart disease in the subject, wherein decreased vascular reactivity in the subject compared to a control subject is indicative of coronary heart disease. The invention also provides methods for increasing sensitivity and specificity of BOLD MRI.Type: GrantFiled: May 7, 2012Date of Patent: September 13, 2022Assignee: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Debiao Li, Sotirios A. Tsaftaris
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Publication number: 20220117508Abstract: Described herein are methods for cardiovascular imaging for diagnosing and/or detecting various cardiovascular diseases. Various embodiments of the invention provide using magnetic resonance imaging of the cardiovascular system of a subject at rest or a normocapnic condition, as well as at a stressed or hypercapnic condition, in a repeated manner enhancing the statistical power, such that fast, motion-corrected, free-breathing, whole-heart imaging of the cardiovascular system is utilized to identify impaired cardiovascular function in a manner with improved specificity and accuracy.Type: ApplicationFiled: February 7, 2020Publication date: April 21, 2022Applicant: Cedars-Sinai Medical CenterInventors: Rohan DHARMAKUMAR, Hsin-Jung YANG
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Publication number: 20220054661Abstract: There are provided methods for diagnosing coronary heart disease in a subject in need thereof comprising administering an admixture comprising CO2 to a subject to reach a predetermined PaCO2 in the subject to induce hyperemia, monitoring vascular reactivity in the subject and diagnosing the presence or absence of coronary heart disease in the subject, wherein decreased vascular reactivity in the subject compared to a control subject is indicative of coronary heart disease. There are also provided methods for increasing sensitivity and specificity of BOLD MRI.Type: ApplicationFiled: August 31, 2021Publication date: February 24, 2022Applicant: Cedars-Sinai Medical CenterInventors: Rohan DHARMAKUMAR, Debiao LI, Sotirios A. TSAFTARIS
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Patent number: 11129911Abstract: There are provided methods for diagnosing coronary heart disease in a subject in need thereof comprising administering an admixture comprising CO2 to a subject to reach a predetermined PaCO2 in the subject to induce hyperemia, monitoring vascular reactivity in the subject and diagnosing the presence or absence of coronary heart disease in the subject, wherein decreased vascular reactivity in the subject compared to a control subject is indicative of coronary heart disease. There are also provided methods for increasing sensitivity and specificity of BOLD MRI.Type: GrantFiled: March 2, 2018Date of Patent: September 28, 2021Assignee: CEDARS-SINAI MEDICAL CENTERInventors: Rohan Dharmakumar, Debiao Li, Sotirios A. Tsaftaris
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Publication number: 20210022640Abstract: The invention provides various methods for imaging a subject's cardiovascular system. The imaging methods may be used to diagnose or prognose various cardiovascular diseases in the subject, without contrast agents or radioactive tracers.Type: ApplicationFiled: April 26, 2019Publication date: January 28, 2021Applicant: Cedars-Sinai Medical CenterInventors: Rohan DHARMAKUMAR, Hsin-Jung YANG
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Publication number: 20200315468Abstract: The invention provides various methods of identifying myocardial infarction (MI) patients who have microvascular obstruction (MO), persistent microvascular obstruction (PMO), reperfusion hemorrhage, iron deposition, chronic iron deposition, and/or fat infiltration/accumulation. The invention provides various methods of identifying myocardial infarction (MI) patients who are at risk of prolonged inflammation burden in heart, adverse cardiac remodeling, electrical abnormality, mechanical abnormality, malignant cardiac arrhythmia, ischemic heart failure, and/or sudden cardiac death. The invention also provides various methods of treating these MI patients with chelation drugs, anti-inflammatory drugs, fat-lowering drugs, cooling therapies, or device therapies, or their combinations.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Ivan Cokic
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Publication number: 20200315456Abstract: The invention is directed to methods for diagnosing reperfusion/non-reperfusion hemorrhage and predicting cardiac arrhythmias and sudden cardiac death in subjects comprising using imaging techniques to detect regional iron oxide deposition. The invention also provides treatment methods for subject at increased risk of sudden cardiac death.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Ivan Cokic
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Patent number: 10694962Abstract: The invention provides various methods of identifying myocardial infarction (MI) patients who have microvascular obstruction (MO), persistent microvascular obstruction (PMO), reperfusion hemorrhage, iron deposition, chronic iron deposition, and/or fat infiltration/accumulation. The invention provides various methods of identifying myocardial infarction (MI) patients who are at risk of prolonged inflammation burden in heart, adverse cardiac remodeling, electrical abnormality, mechanical abnormality, malignant cardiac arrhythmia, ischemic heart failure, and/or sudden cardiac death. The invention also provides various methods of treating these MI patients with chelation drugs, anti-inflammatory drugs, fat-lowering drugs, cooling therapies, or device therapies, or their combinations.Type: GrantFiled: March 9, 2016Date of Patent: June 30, 2020Assignee: CEDARS-SINAI MEDICAL CENTERInventors: Rohan Dharmakumar, Ivan Cokic
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Patent number: 10694961Abstract: The invention is directed to methods for diagnosing reperfusion/non-reperfusion hemorrhage and predicting cardiac arrhythmias and sudden cardiac death in subjects comprising using imaging techniques to detect regional iron oxide deposition. The invention also provides treatment methods for subject at increased risk of sudden cardiac death.Type: GrantFiled: June 13, 2012Date of Patent: June 30, 2020Assignee: CEDARIS-SINAI MEDICAL CENTERInventors: Rohan Dharmakumar, Ivan Cokic
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Patent number: 10471094Abstract: Provided herein are methods for reducing ischemia-reperfusion injury and/or microvascular obstructions by administering to the subject effective amounts of carbon dioxide and oxygen before, during and/or after re-establishing perfusion. In some embodiments, the methods further include using therapeutic hypothermia.Type: GrantFiled: August 5, 2014Date of Patent: November 12, 2019Assignee: CEDARS-SINAI MEDICAL CENTERInventor: Rohan Dharmakumar
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Publication number: 20190038781Abstract: There are provided methods for diagnosing coronary heart disease in a subject in need thereof comprising administering an admixture comprising CO2 to a subject to reach a predetermined PaCO2 in the subject to induce hyperemia, monitoring vascular reactivity in the subject and diagnosing the presence or absence of coronary heart disease in the subject, wherein decreased vascular reactivity in the subject compared to a control subject is indicative of coronary heart disease. There are also provided methods for increasing sensitivity and specificity of BOLD MRI.Type: ApplicationFiled: March 2, 2018Publication date: February 7, 2019Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Debiao Li, Sotirios A. Tsaftaris
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Publication number: 20180271375Abstract: The invention provides various methods for imaging a subject's cardiovascular system. The imaging method may be used to provide a diagnosis or prognosis of various cardiovascular diseases in the subject, without contrast agents or radioactive tracers, and further generating a Gaussian Mixture Model to obtain a reference value of a normal myocardium.Type: ApplicationFiled: September 30, 2016Publication date: September 27, 2018Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Hsin-Jung Yang
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Publication number: 20180185519Abstract: The invention provides methods for diagnosing coronary heart disease in a subject in need thereof comprising administering an admixture comprising CO2 to a subject to reach a predetermined PaCO2 in the subject to induce hyperemia, monitoring vascular reactivity in the subject and diagnosing the presence or absence of coronary heart disease in the subject, wherein decreased vascular reactivity in the subject compared to a control subject is indicative of coronary heart disease. The invention also provides methods for increasing sensitivity and specificity of BOLD MRI.Type: ApplicationFiled: August 8, 2017Publication date: July 5, 2018Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Debiao Li, Sotirios A. Tsaftaris
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Publication number: 20160183815Abstract: The invention provides various methods of identifying myocardial infarction (MI) patients who have microvascular obstruction (MO), persistent microvascular obstruction (PMO), reperfusion hemorrhage, iron deposition, chronic iron deposition, and/or fat infiltration/accumulation. The invention provides various methods of identifying myocardial infarction (MI) patients who are at risk of prolonged inflammation burden in heart, adverse cardiac remodeling, electrical abnormality, mechanical abnormality, malignant cardiac arrhythmia, ischemic heart failure, and/or sudden cardiac death. The invention also provides various methods of treating these MI patients with chelation drugs, anti-inflammatory drugs, fat-lowering drugs, cooling therapies, or device therapies, or their combinations.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Applicant: Cedars-Sinai Medical CenterInventors: Rohan Dharmakumar, Ivan Cokic