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Your search keyword '"Rajiv Chaturvedi"' showing total 5 results
Start Over Author "Rajiv Chaturvedi" Journal journal of the american college of cardiology
5 results on '"Rajiv Chaturvedi"'

2. DUCTAL ORIGIN OF AN ISOLATED PULMONARY ARTERY: INITIAL STENTING FOLLOWED BY UNIFOCALIZATION

Author

Navaneetha Sasikumar, Rajiv Chaturvedi, Kyong-Jin Lee, and Lee Benson

Subjects
Surgical repair, medicine.medical_specialty, business.industry, Pulmonary edema, medicine.disease, Surgery, Internal medicine, medicine.artery, Pulmonary artery, medicine, Cardiology, Small vessel, Cardiology and Cardiovascular Medicine, business
Abstract

Background: Primary surgical repair of an isolated pulmonary artery can be difficult because of the small vessel and reperfusion pulmonary edema. We evaluated a strategy of primary stenting of the ductal origin of the pulmonary artery followed by later complete repair. Methods: Retrospective

Published
2017

3. Modified ultrafiltration improves cardiac systolic and diastolic function immediately after cardiopulmonary bypass in children

Author

Christopher Lincoln, Darryl F. Shore, Paul D. White, Richard Szwarc, Andrew Bishop, Rajiv Chaturvedi, and Andrew N. Redington

Subjects
medicine.medical_specialty, business.industry, law, Internal medicine, Cardiology, medicine, Cardiopulmonary bypass, Modified ultrafiltration, Diastolic function, Cardiology and Cardiovascular Medicine, business, law.invention
Published
1996

4. 794–3 Development and Validation of a Conductance Method to Measure Pulmonary Regurgitation in Patients Late After Tetralogy of Fallot Repair

Author

Paul D. White, Rajiv Chaturvedi, and Andrew N. Redington

Subjects
medicine.medical_specialty, business.industry, Beat (acoustics), Blood volume, Stroke volume, Conductance method, medicine.disease, Right pulmonary artery, Internal medicine, Pulmonary regurgitation, Occlusion, Cardiology, medicine, Cardiology and Cardiovascular Medicine, business, Tetralogy of Fallot
Abstract

Pulmonary regurgitation (PR) is a significant determinant of right ventricular and global functional performance late after repair of tetralogy of Fallot (rTOF). We have previously shown that PR can be quantified using pressure volume loops by measuring RV volume increase during isovolumic relaxation period. This (digitisation of RV angiograms) and other methods of RV volume measurement (eg. MRI) do not allow real time analysis. However, measurement of RV blood volume by a conductance catheter may allow beat to beat analysis of RV volume and PR fraction. A conductance catheter method was validated which would enable continuous on line recording of pressure volume loops from which pulmonary incompetence could be directly assessed. Five silicone human right ventricular casts were constructed and an assessment of the accuracy and linearity of the conductance catheter was undertaken to compare conductance against known volume. The mean correlation coefficient (r2) and Y intercept for all the right ventricular cast studies was 0.94 (SE 0.02) and –0.225 (SE 1.72) respectively. Five patients late after rTOF with clinically significant PR had right heart catheterisation during which simultaneous microtip pressure and conductance volume were measured. All five patients had pressure volume loops typical of PR (Figure). The PR volume was indexed to stroke volume and varied significantly with respiration (p l 0.05), decreased with Valsalva manoeuvre (p l 0.05) and increased with transient right pulmonary artery occlusion (p l 0.05). Conductance measurement allows real time dynamic assessment of PR and demonstrates the impact of different loading conditions. Download : Download high-res image (258KB) Download : Download full-size image

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