Right heart catheterization using metallic guidewires and low SAR cardiovascular magnetic resonance fluoroscopy at 1.5 Tesla: first in human experience

Autor: Delaney R. McGuirt, Adrienne E. Campbell-Washburn, William H. Schenke, Jaffar M. Khan, Daniel A. Herzka, Annette M. Stine, Elena K. Grant, Toby Rogers, Laurie P. Grant, Rajiv Ramasawmy, Jonathan R. Mazal, Robert J. Lederman
Jazyk: angličtina
Rok vydání: 2018
Předmět:
lcsh:Diseases of the circulatory (Cardiovascular) system
Cardiac Catheterization
Hot Temperature
Time Factors
Sus scrofa
Guidewire
030204 cardiovascular system & hematology
Magnetic Resonance Imaging
Interventional
Imaging phantom
Cardiac Catheters
030218 nuclear medicine & medical imaging
Workflow
03 medical and health sciences
0302 clinical medicine
Flip angle
Predictive Value of Tests
medicine.artery
Materials Testing
medicine
Alloys
Fluoroscopy
Animals
Humans
Radiology
Nuclear Medicine and imaging
Right heart catheterization
Spiral MRI
Radiological and Ultrasound Technology
medicine.diagnostic_test
business.industry
Phantoms
Imaging
Research
Magnetic resonance imaging
Real-time MRI
Equipment Design
Interventional MRI catheterization
3. Good health
Catheter
lcsh:RC666-701
Heart catheterization
Pulmonary artery
Models
Animal
Invasive hemodynamics
Cardiovascular magnetic resonance
Cardiology and Cardiovascular Medicine
business
Nuclear medicine
Medical device heating
Zdroj: Journal of Cardiovascular Magnetic Resonance
Journal of Cardiovascular Magnetic Resonance, Vol 20, Iss 1, Pp 1-9 (2018)
ISSN: 1532-429X
1097-6647
Popis: Background Cardiovascular magnetic resonance (CMR) fluoroscopy allows for simultaneous measurement of cardiac function, flow and chamber pressure during diagnostic heart catheterization. To date, commercial metallic guidewires were considered contraindicated during CMR fluoroscopy due to concerns over radiofrequency (RF)-induced heating. The inability to use metallic guidewires hampers catheter navigation in patients with challenging anatomy. Here we use low specific absorption rate (SAR) imaging from gradient echo spiral acquisitions and a commercial nitinol guidewire for CMR fluoroscopy right heart catheterization in patients. Methods The low-SAR imaging protocol used a reduced flip angle gradient echo acquisition (10° vs 45°) and a longer repetition time (TR) spiral readout (10 ms vs 2.98 ms). Temperature was measured in vitro in the ASTM 2182 gel phantom and post-mortem animal experiments to ensure freedom from heating with the selected guidewire (150 cm × 0.035″ angled-tip nitinol Terumo Glidewire). Seven patients underwent CMR fluoroscopy catheterization. Time to enter each chamber (superior vena cava, main pulmonary artery, and each branch pulmonary artery) was recorded and device visibility and confidence in catheter and guidewire position were scored on a Likert-type scale. Results Negligible heating (
Databáze: OpenAIRE
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